Index: /trunk/src/VBox/Devices/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Devices/Makefile.kmk	(revision 44806)
+++ /trunk/src/VBox/Devices/Makefile.kmk	(revision 44807)
@@ -174,5 +174,5 @@
  	PC/DevSMC.cpp \
  	PC/DevLPC.cpp \
- 	Storage/fdc.c \
+ 	Storage/DevFdc.cpp \
  	Serial/DevSerial.cpp \
  	Parallel/DevParallel.cpp \
Index: /trunk/src/VBox/Devices/Storage/DevFdc.cpp
===================================================================
--- /trunk/src/VBox/Devices/Storage/DevFdc.cpp	(revision 44807)
+++ /trunk/src/VBox/Devices/Storage/DevFdc.cpp	(revision 44807)
@@ -0,0 +1,2780 @@
+/* $Id$ */
+/** @file
+ * VBox storage devices: Floppy disk controller
+ */
+
+/*
+ * Copyright (C) 2006-2011 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ * --------------------------------------------------------------------
+ *
+ * This code is based on:
+ *
+ * QEMU Floppy disk emulator (Intel 82078)
+ *
+ * Copyright (c) 2003 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+/*******************************************************************************
+*   Header Files                                                               *
+*******************************************************************************/
+#define LOG_GROUP LOG_GROUP_DEV_FDC
+#include <VBox/vmm/pdmdev.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/uuid.h>
+
+#include "VBoxDD.h"
+#include "vl_vbox.h"
+
+#define FDC_SAVESTATE_CURRENT   2       /* The new and improved saved state. */
+#define FDC_SAVESTATE_OLD       1       /* The original saved state. */
+
+#define MAX_FD 2
+
+#define PDMIBASE_2_FDRIVE(pInterface) \
+    ((fdrive_t *)((uintptr_t)(pInterface) - RT_OFFSETOF(fdrive_t, IBase)))
+
+#define PDMIMOUNTNOTIFY_2_FDRIVE(p)  \
+    ((fdrive_t *)((uintptr_t)(p) - RT_OFFSETOF(fdrive_t, IMountNotify)))
+
+
+/********************************************************/
+/* debug Floppy devices */
+/* #define DEBUG_FLOPPY */
+
+#ifndef VBOX
+    #ifdef DEBUG_FLOPPY
+    #define FLOPPY_DPRINTF(fmt, args...) \
+        do { printf("FLOPPY: " fmt , ##args); } while (0)
+    #endif
+#else /* !VBOX */
+    # ifdef LOG_ENABLED
+        static void FLOPPY_DPRINTF (const char *fmt, ...)
+        {
+            if (LogIsEnabled ()) {
+                va_list args;
+                va_start (args, fmt);
+                RTLogLogger (NULL, NULL, "floppy: %N", fmt, &args); /* %N - nested va_list * type formatting call. */
+                va_end (args);
+            }
+        }
+    # else
+      DECLINLINE(void) FLOPPY_DPRINTF(const char *pszFmt, ...) {}
+    # endif
+#endif /* !VBOX */
+
+#ifndef VBOX
+#define FLOPPY_ERROR(fmt, args...) \
+    do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
+#else /* VBOX */
+#   define FLOPPY_ERROR RTLogPrintf
+#endif /* VBOX */
+
+#ifdef VBOX
+typedef struct fdctrl_t fdctrl_t;
+#endif /* VBOX */
+
+/********************************************************/
+/* Floppy drive emulation                               */
+
+#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
+#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
+
+/* Will always be a fixed parameter for us */
+#define FD_SECTOR_LEN          512
+#define FD_SECTOR_SC           2   /* Sector size code */
+#define FD_RESET_SENSEI_COUNT  4   /* Number of sense interrupts on RESET */
+
+/* Floppy disk drive emulation */
+typedef enum fdisk_type_t {
+    FDRIVE_DISK_288   = 0x01, /* 2.88 MB disk           */
+    FDRIVE_DISK_144   = 0x02, /* 1.44 MB disk           */
+    FDRIVE_DISK_720   = 0x03, /* 720 kB disk            */
+    FDRIVE_DISK_USER  = 0x04, /* User defined geometry  */
+    FDRIVE_DISK_NONE  = 0x05  /* No disk                */
+} fdisk_type_t;
+
+typedef enum fdrive_type_t {
+    FDRIVE_DRV_144  = 0x00,   /* 1.44 MB 3"5 drive      */
+    FDRIVE_DRV_288  = 0x01,   /* 2.88 MB 3"5 drive      */
+    FDRIVE_DRV_120  = 0x02,   /* 1.2  MB 5"25 drive     */
+    FDRIVE_DRV_NONE = 0x03    /* No drive connected     */
+} fdrive_type_t;
+
+typedef uint8_t fdrive_flags_t;
+#define FDISK_DBL_SIDES     UINT8_C(0x01)
+
+typedef enum fdrive_rate_t {
+    FDRIVE_RATE_500K = 0x00,  /* 500 Kbps               */
+    FDRIVE_RATE_300K = 0x01,  /* 300 Kbps               */
+    FDRIVE_RATE_250K = 0x02,  /* 250 Kbps               */
+    FDRIVE_RATE_1M   = 0x03   /* 1 Mbps                 */
+} fdrive_rate_t;
+
+/**
+ * The status for one drive.
+ *
+ * @implements  PDMIBASE
+ * @implements  PDMIBLOCKPORT
+ * @implements  PDMIMOUNTNOTIFY
+ */
+typedef struct fdrive_t {
+#ifndef VBOX
+    BlockDriverState *bs;
+#else /* VBOX */
+    /** Pointer to the attached driver's base interface. */
+    R3PTRTYPE(PPDMIBASE)            pDrvBase;
+    /** Pointer to the attached driver's block interface. */
+    R3PTRTYPE(PPDMIBLOCK)           pDrvBlock;
+    /** Pointer to the attached driver's block bios interface. */
+    R3PTRTYPE(PPDMIBLOCKBIOS)       pDrvBlockBios;
+    /** Pointer to the attached driver's mount interface.
+     * This is NULL if the driver isn't a removable unit. */
+    R3PTRTYPE(PPDMIMOUNT)           pDrvMount;
+    /** The base interface. */
+    PDMIBASE                        IBase;
+    /** The block port interface. */
+    PDMIBLOCKPORT                   IPort;
+    /** The mount notify interface. */
+    PDMIMOUNTNOTIFY                 IMountNotify;
+    /** The LUN #. */
+    RTUINT                          iLUN;
+    /** The LED for this LUN. */
+    PDMLED                          Led;
+#endif
+    /* Drive status */
+    fdrive_type_t drive;
+    uint8_t perpendicular;    /* 2.88 MB access mode    */
+    uint8_t dsk_chg;          /* Disk change line       */
+    /* Position */
+    uint8_t head;
+    uint8_t track;
+    uint8_t sect;
+    /* Media */
+    fdrive_flags_t flags;
+    uint8_t last_sect;        /* Nb sector per track    */
+    uint8_t max_track;        /* Nb of tracks           */
+    uint16_t bps;             /* Bytes per sector       */
+    uint8_t ro;               /* Is read-only           */
+    uint8_t media_rate;       /* Data rate of medium    */
+} fdrive_t;
+
+#define NUM_SIDES(drv)      (drv->flags & FDISK_DBL_SIDES ? 2 : 1)
+
+static void fd_init(fdrive_t *drv)
+{
+    /* Drive */
+    drv->drive = FDRIVE_DRV_NONE;
+    drv->perpendicular = 0;
+    /* Disk */
+    drv->last_sect = 0;
+    drv->max_track = 0;
+}
+
+static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
+                          uint8_t last_sect, uint8_t num_sides)
+{
+    return (((track * num_sides) + head) * last_sect) + sect - 1; /* sect >= 1 */
+}
+
+/* Returns current position, in sectors, for given drive */
+static int fd_sector(fdrive_t *drv)
+{
+    return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, NUM_SIDES(drv));
+}
+
+/* Seek to a new position:
+ * returns 0 if already on right track
+ * returns 1 if track changed
+ * returns 2 if track is invalid
+ * returns 3 if sector is invalid
+ * returns 4 if seek is disabled
+ */
+static int fd_seek(fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
+                   int enable_seek)
+{
+    int sector;
+    int ret;
+
+    if (track > drv->max_track ||
+        (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
+        FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
+                       head, track, sect, 1,
+                       (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
+                       drv->max_track, drv->last_sect);
+        return 2;
+    }
+    if (sect > drv->last_sect) {
+        FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
+                       head, track, sect, 1,
+                       (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
+                       drv->max_track, drv->last_sect);
+        return 3;
+    }
+    sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
+    ret = 0;
+    if (sector != fd_sector(drv)) {
+#if 0
+        if (!enable_seek) {
+            FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
+                         head, track, sect, 1, drv->max_track, drv->last_sect);
+            return 4;
+        }
+#endif
+        drv->head = head;
+        if (drv->track != track)
+            ret = 1;
+        drv->track = track;
+        drv->sect = sect;
+    }
+
+    return ret;
+}
+
+/* Set drive back to track 0 */
+static void fd_recalibrate(fdrive_t *drv)
+{
+    FLOPPY_DPRINTF("recalibrate\n");
+    drv->head = 0;
+    drv->track = 0;
+    drv->sect = 1;
+}
+
+/* Recognize floppy formats */
+typedef struct fd_format_t {
+    fdrive_type_t drive;
+    fdisk_type_t  disk;
+    uint8_t last_sect;
+    uint8_t max_track;
+    uint8_t max_head;
+    fdrive_rate_t rate;
+    const char *str;
+} fd_format_t;
+
+static fd_format_t fd_formats[] = {
+    /* First entry is default format */
+    /* 1.44 MB 3"1/2 floppy disks */
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K,  "1.6 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB 3\"1/2", },
+    /* 2.88 MB 3"1/2 floppy disks */
+    { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M,   "2.88 MB 3\"1/2", },
+    { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M,   "3.12 MB 3\"1/2", },
+    { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M,    "3.2 MB 3\"1/2", },
+    { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M,   "3.52 MB 3\"1/2", },
+    { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M,   "3.84 MB 3\"1/2", },
+    /* 720 kB 3"1/2 floppy disks */
+    { FDRIVE_DRV_144, FDRIVE_DISK_720,  9, 80, 1, FDRIVE_RATE_250K,  "720 kB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K,  "800 kB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K,  "820 kB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K,  "830 kB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB 3\"1/2", },
+    { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB 3\"1/2", },
+    /* 1.2 MB 5"1/4 floppy disks */
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, FDRIVE_RATE_500K,  "1.2 MB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, FDRIVE_RATE_500K, "1.48 MB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, FDRIVE_RATE_500K, "1.49 MB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, FDRIVE_RATE_500K,  "1.6 MB 5\"1/4", },
+    /* 720 kB 5"1/4 floppy disks */
+    { FDRIVE_DRV_120, FDRIVE_DISK_288,  9, 80, 1, FDRIVE_RATE_250K,  "720 kB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, FDRIVE_RATE_250K,  "880 kB 5\"1/4", },
+    /* 360 kB 5"1/4 floppy disks */
+    { FDRIVE_DRV_120, FDRIVE_DISK_288,  9, 40, 1, FDRIVE_RATE_300K,  "360 kB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288,  9, 40, 0, FDRIVE_RATE_300K,  "180 kB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, FDRIVE_RATE_300K,  "410 kB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, FDRIVE_RATE_300K,  "420 kB 5\"1/4", },
+    /* 320 kB 5"1/4 floppy disks */
+    { FDRIVE_DRV_120, FDRIVE_DISK_288,  8, 40, 1, FDRIVE_RATE_250K,  "320 kB 5\"1/4", },
+    { FDRIVE_DRV_120, FDRIVE_DISK_288,  8, 40, 0, FDRIVE_RATE_250K,  "160 kB 5\"1/4", },
+    /* 360 kB must match 5"1/4 better than 3"1/2... */
+    { FDRIVE_DRV_144, FDRIVE_DISK_720,  9, 80, 0, FDRIVE_RATE_250K,  "360 kB 3\"1/2", },
+    /* end */
+    { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, (fdrive_rate_t)0, NULL, },
+};
+
+/* Revalidate a disk drive after a disk change */
+static void fd_revalidate(fdrive_t *drv)
+{
+    const fd_format_t *parse;
+    uint64_t nb_sectors, size;
+    int i, first_match, match;
+    int nb_heads, max_track, last_sect, ro;
+
+    FLOPPY_DPRINTF("revalidate\n");
+#ifndef VBOX
+    if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
+        ro = bdrv_is_read_only(drv->bs);
+        bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
+#else /* VBOX */
+    if (drv->pDrvBlock
+        && drv->pDrvMount
+        && drv->pDrvMount->pfnIsMounted (drv->pDrvMount)) {
+        ro = drv->pDrvBlock->pfnIsReadOnly (drv->pDrvBlock);
+        nb_heads = max_track = last_sect = 0;
+#endif /* VBOX */
+        if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
+            FLOPPY_DPRINTF("User defined disk (%d %d %d)",
+                           nb_heads - 1, max_track, last_sect);
+        } else {
+#ifndef VBOX
+            bdrv_get_geometry(drv->bs, &nb_sectors);
+#else /* VBOX */
+            {
+                uint64_t size2 = drv->pDrvBlock->pfnGetSize (drv->pDrvBlock);
+                nb_sectors = size2 / FD_SECTOR_LEN;
+            }
+#endif /* VBOX */
+            match = -1;
+            first_match = -1;
+            for (i = 0;; i++) {
+                parse = &fd_formats[i];
+                if (parse->drive == FDRIVE_DRV_NONE)
+                    break;
+                if (drv->drive == parse->drive ||
+                    drv->drive == FDRIVE_DRV_NONE) {
+                    size = (parse->max_head + 1) * parse->max_track *
+                        parse->last_sect;
+                    if (nb_sectors == size) {
+                        match = i;
+                        break;
+                    }
+                    if (first_match == -1)
+                        first_match = i;
+                }
+            }
+            if (match == -1) {
+                if (first_match == -1)
+                    match = 1;
+                else
+                    match = first_match;
+                parse = &fd_formats[match];
+            }
+            nb_heads = parse->max_head + 1;
+            max_track = parse->max_track;
+            last_sect = parse->last_sect;
+            drv->drive = parse->drive;
+#ifdef VBOX
+            drv->media_rate = parse->rate;
+#endif
+            FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
+                           nb_heads, max_track, last_sect, ro ? "ro" : "rw");
+            LogRel(("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
+                    nb_heads, max_track, last_sect, ro ? "ro" : "rw"));
+        }
+        if (nb_heads == 1) {
+            drv->flags &= ~FDISK_DBL_SIDES;
+        } else {
+            drv->flags |= FDISK_DBL_SIDES;
+        }
+        drv->max_track = max_track;
+        drv->last_sect = last_sect;
+        drv->ro = ro;
+    } else {
+        FLOPPY_DPRINTF("No disk in drive\n");
+        drv->last_sect = 0;
+        drv->max_track = 0;
+        drv->flags &= ~FDISK_DBL_SIDES;
+        drv->dsk_chg = true;    /* Disk change line active. */
+    }
+}
+
+/********************************************************/
+/* Intel 82078 floppy disk controller emulation          */
+
+static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq);
+static void fdctrl_reset_fifo(fdctrl_t *fdctrl);
+#ifndef VBOX
+static int fdctrl_transfer_handler (void *opaque, int nchan,
+                                    int dma_pos, int dma_len);
+#else /* VBOX: */
+static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
+                                                       void *opaque,
+                                                       unsigned nchan,
+                                                       uint32_t dma_pos,
+                                                       uint32_t dma_len);
+#endif /* VBOX */
+static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0);
+static fdrive_t *get_cur_drv(fdctrl_t *fdctrl);
+
+static void fdctrl_result_timer(void *opaque);
+static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl);
+static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl);
+static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl);
+static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl);
+static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl);
+static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_data(fdctrl_t *fdctrl);
+static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl);
+static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value);
+
+enum {
+    FD_DIR_WRITE   = 0,
+    FD_DIR_READ    = 1,
+    FD_DIR_SCANE   = 2,
+    FD_DIR_SCANL   = 3,
+    FD_DIR_SCANH   = 4
+};
+
+enum {
+    FD_STATE_MULTI  = 0x01,     /* multi track flag */
+    FD_STATE_FORMAT = 0x02,     /* format flag */
+    FD_STATE_SEEK   = 0x04      /* seek flag */
+};
+
+enum {
+    FD_REG_SRA = 0x00,
+    FD_REG_SRB = 0x01,
+    FD_REG_DOR = 0x02,
+    FD_REG_TDR = 0x03,
+    FD_REG_MSR = 0x04,
+    FD_REG_DSR = 0x04,
+    FD_REG_FIFO = 0x05,
+    FD_REG_DIR = 0x07,
+    FD_REG_CCR = 0x07
+};
+
+enum {
+    FD_CMD_READ_TRACK = 0x02,
+    FD_CMD_SPECIFY = 0x03,
+    FD_CMD_SENSE_DRIVE_STATUS = 0x04,
+    FD_CMD_WRITE = 0x05,
+    FD_CMD_READ = 0x06,
+    FD_CMD_RECALIBRATE = 0x07,
+    FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
+    FD_CMD_WRITE_DELETED = 0x09,
+    FD_CMD_READ_ID = 0x0a,
+    FD_CMD_READ_DELETED = 0x0c,
+    FD_CMD_FORMAT_TRACK = 0x0d,
+    FD_CMD_DUMPREG = 0x0e,
+    FD_CMD_SEEK = 0x0f,
+    FD_CMD_VERSION = 0x10,
+    FD_CMD_SCAN_EQUAL = 0x11,
+    FD_CMD_PERPENDICULAR_MODE = 0x12,
+    FD_CMD_CONFIGURE = 0x13,
+    FD_CMD_LOCK = 0x14,
+    FD_CMD_VERIFY = 0x16,
+    FD_CMD_POWERDOWN_MODE = 0x17,
+    FD_CMD_PART_ID = 0x18,
+    FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
+    FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
+    FD_CMD_SAVE = 0x2e,
+    FD_CMD_OPTION = 0x33,
+    FD_CMD_RESTORE = 0x4e,
+    FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
+    FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
+    FD_CMD_FORMAT_AND_WRITE = 0xcd,
+    FD_CMD_RELATIVE_SEEK_IN = 0xcf
+};
+
+enum {
+    FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
+    FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
+    FD_CONFIG_POLL  = 0x10, /* Poll enabled */
+    FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
+    FD_CONFIG_EIS   = 0x40  /* No implied seeks */
+};
+
+enum {
+    FD_SR0_EQPMT    = 0x10,
+    FD_SR0_SEEK     = 0x20,
+    FD_SR0_ABNTERM  = 0x40,
+    FD_SR0_INVCMD   = 0x80,
+    FD_SR0_RDYCHG   = 0xc0
+};
+
+enum {
+    FD_SR1_MA       = 0x01, /* Missing address mark */
+    FD_SR1_NW       = 0x02, /* Not writable */
+    FD_SR1_EC       = 0x80  /* End of cylinder */
+};
+
+enum {
+    FD_SR2_SNS      = 0x04, /* Scan not satisfied */
+    FD_SR2_SEH      = 0x08  /* Scan equal hit */
+};
+
+enum {
+    FD_SRA_DIR      = 0x01,
+    FD_SRA_nWP      = 0x02,
+    FD_SRA_nINDX    = 0x04,
+    FD_SRA_HDSEL    = 0x08,
+    FD_SRA_nTRK0    = 0x10,
+    FD_SRA_STEP     = 0x20,
+    FD_SRA_nDRV2    = 0x40,
+    FD_SRA_INTPEND  = 0x80
+};
+
+enum {
+    FD_SRB_MTR0     = 0x01,
+    FD_SRB_MTR1     = 0x02,
+    FD_SRB_WGATE    = 0x04,
+    FD_SRB_RDATA    = 0x08,
+    FD_SRB_WDATA    = 0x10,
+    FD_SRB_DR0      = 0x20
+};
+
+enum {
+#if MAX_FD == 4
+    FD_DOR_SELMASK  = 0x03,
+#else
+    FD_DOR_SELMASK  = 0x01,
+#endif
+    FD_DOR_nRESET   = 0x04,
+    FD_DOR_DMAEN    = 0x08,
+    FD_DOR_MOTEN0   = 0x10,
+    FD_DOR_MOTEN1   = 0x20,
+    FD_DOR_MOTEN2   = 0x40,
+    FD_DOR_MOTEN3   = 0x80
+};
+
+enum {
+#if MAX_FD == 4
+    FD_TDR_BOOTSEL  = 0x0c
+#else
+    FD_TDR_BOOTSEL  = 0x04
+#endif
+};
+
+enum {
+    FD_DSR_DRATEMASK= 0x03,
+    FD_DSR_PWRDOWN  = 0x40,
+    FD_DSR_SWRESET  = 0x80
+};
+
+enum {
+    FD_MSR_DRV0BUSY = 0x01,
+    FD_MSR_DRV1BUSY = 0x02,
+    FD_MSR_DRV2BUSY = 0x04,
+    FD_MSR_DRV3BUSY = 0x08,
+    FD_MSR_CMDBUSY  = 0x10,
+    FD_MSR_NONDMA   = 0x20,
+    FD_MSR_DIO      = 0x40,
+    FD_MSR_RQM      = 0x80
+};
+
+enum {
+    FD_DIR_DSKCHG   = 0x80
+};
+
+#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
+#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
+#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
+
+#ifdef VBOX
+/**
+ * Floppy controller state.
+ *
+ * @implements  PDMILEDPORTS
+ */
+#endif
+struct fdctrl_t {
+#ifndef VBOX
+    fdctrl_t *fdctrl;
+#endif
+    /* Controller's identification */
+    uint8_t version;
+    /* HW */
+#ifndef VBOX
+    int irq;
+    int dma_chann;
+#else
+    uint8_t irq_lvl;
+    uint8_t dma_chann;
+#endif
+    uint32_t io_base;
+    /* Controller state */
+    QEMUTimer *result_timer;
+    uint8_t sra;
+    uint8_t srb;
+    uint8_t dor;
+    uint8_t tdr;
+    uint8_t dsr;
+    uint8_t msr;
+    uint8_t cur_drv;
+    uint8_t status0;
+    uint8_t status1;
+    uint8_t status2;
+    /* Command FIFO */
+    uint8_t fifo[FD_SECTOR_LEN];
+    uint32_t data_pos;
+    uint32_t data_len;
+    uint8_t data_state;
+    uint8_t data_dir;
+    uint8_t eot; /* last wanted sector */
+    /* States kept only to be returned back */
+    /* Timers state */
+    uint8_t timer0;
+    uint8_t timer1;
+    /* precompensation */
+    uint8_t precomp_trk;
+    uint8_t config;
+    uint8_t lock;
+    /* Power down config (also with status regB access mode */
+    uint8_t pwrd;
+    /* Floppy drives */
+    uint8_t num_floppies;
+    fdrive_t drives[MAX_FD];
+    uint8_t reset_sensei;
+#ifdef VBOX
+    /** Pointer to device instance. */
+    PPDMDEVINS pDevIns;
+
+    /** Status LUN: The base interface. */
+    PDMIBASE IBaseStatus;
+    /** Status LUN: The Leds interface. */
+    PDMILEDPORTS ILeds;
+    /** Status LUN: The Partner of ILeds. */
+    PPDMILEDCONNECTORS pLedsConnector;
+#endif
+};
+
+static uint32_t fdctrl_read (void *opaque, uint32_t reg)
+{
+    fdctrl_t *fdctrl = (fdctrl_t *)opaque;
+    uint32_t retval;
+
+    switch (reg) {
+    case FD_REG_SRA:
+        retval = fdctrl_read_statusA(fdctrl);
+        break;
+    case FD_REG_SRB:
+        retval = fdctrl_read_statusB(fdctrl);
+        break;
+    case FD_REG_DOR:
+        retval = fdctrl_read_dor(fdctrl);
+        break;
+    case FD_REG_TDR:
+        retval = fdctrl_read_tape(fdctrl);
+        break;
+    case FD_REG_MSR:
+        retval = fdctrl_read_main_status(fdctrl);
+        break;
+    case FD_REG_FIFO:
+        retval = fdctrl_read_data(fdctrl);
+        break;
+    case FD_REG_DIR:
+        retval = fdctrl_read_dir(fdctrl);
+        break;
+    default:
+        retval = (uint32_t)(-1);
+        break;
+    }
+    FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
+
+    return retval;
+}
+
+static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
+{
+    fdctrl_t *fdctrl = (fdctrl_t *)opaque;
+
+    FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
+
+    switch (reg) {
+    case FD_REG_DOR:
+        fdctrl_write_dor(fdctrl, value);
+        break;
+    case FD_REG_TDR:
+        fdctrl_write_tape(fdctrl, value);
+        break;
+    case FD_REG_DSR:
+        fdctrl_write_rate(fdctrl, value);
+        break;
+    case FD_REG_FIFO:
+        fdctrl_write_data(fdctrl, value);
+        break;
+    case FD_REG_CCR:
+        fdctrl_write_ccr(fdctrl, value);
+        break;
+    default:
+        break;
+    }
+}
+
+#ifdef VBOX
+/**
+ * Called when a medium is mounted.
+ *
+ * @param   pInterface      Pointer to the interface structure
+ *                          containing the called function pointer.
+ */
+static DECLCALLBACK(void) fdMountNotify(PPDMIMOUNTNOTIFY pInterface)
+{
+    fdrive_t *drv = PDMIMOUNTNOTIFY_2_FDRIVE (pInterface);
+    LogFlow(("fdMountNotify:\n"));
+    fd_revalidate(drv);
+}
+
+/**
+ * Called when a medium is unmounted.
+ * @param   pInterface      Pointer to the interface structure
+ *                          containing the called function pointer.
+ */
+static DECLCALLBACK(void) fdUnmountNotify(PPDMIMOUNTNOTIFY pInterface)
+{
+    fdrive_t *drv = PDMIMOUNTNOTIFY_2_FDRIVE (pInterface);
+    LogFlow(("fdUnmountNotify:\n"));
+    fd_revalidate(drv);
+}
+#endif
+
+/* Change IRQ state */
+static void fdctrl_reset_irq(fdctrl_t *fdctrl)
+{
+    if (!(fdctrl->sra & FD_SRA_INTPEND))
+        return;
+    FLOPPY_DPRINTF("Reset interrupt\n");
+#ifdef VBOX
+    PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 0);
+#else
+    qemu_set_irq(fdctrl->irq, 0);
+#endif
+    fdctrl->sra &= ~FD_SRA_INTPEND;
+}
+
+static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0)
+{
+    if (!(fdctrl->sra & FD_SRA_INTPEND)) {
+#ifdef VBOX
+        PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 1);
+#else
+        qemu_set_irq(fdctrl->irq, 1);
+#endif
+        fdctrl->sra |= FD_SRA_INTPEND;
+    }
+    if (status0 & FD_SR0_SEEK) {
+        fdrive_t    *cur_drv;
+
+        /* A seek clears the disk change line (if a disk is inserted). */
+        cur_drv = get_cur_drv(fdctrl);
+        if (cur_drv->max_track)
+            cur_drv->dsk_chg = false;
+    }
+
+    fdctrl->reset_sensei = 0;
+    fdctrl->status0 = status0;
+    FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
+}
+
+/* Reset controller */
+static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq)
+{
+    int i;
+
+    FLOPPY_DPRINTF("reset controller\n");
+    fdctrl_reset_irq(fdctrl);
+    /* Initialise controller */
+    fdctrl->sra = 0;
+    fdctrl->srb = 0xc0;
+#ifdef VBOX
+    if (!fdctrl->drives[1].pDrvBlock)
+#else
+    if (!fdctrl->drives[1].bs)
+#endif
+        fdctrl->sra |= FD_SRA_nDRV2;
+    fdctrl->cur_drv = 0;
+    fdctrl->dor = FD_DOR_nRESET;
+    fdctrl->dor |= (fdctrl->dma_chann != 0xff) ? FD_DOR_DMAEN : 0;
+    fdctrl->msr = FD_MSR_RQM;
+    /* FIFO state */
+    fdctrl->data_pos = 0;
+    fdctrl->data_len = 0;
+    fdctrl->data_state = 0;
+    fdctrl->data_dir = FD_DIR_WRITE;
+    for (i = 0; i < MAX_FD; i++)
+        fd_recalibrate(&fdctrl->drives[i]);
+    fdctrl_reset_fifo(fdctrl);
+    if (do_irq) {
+        fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
+        fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
+    }
+}
+
+static inline fdrive_t *drv0(fdctrl_t *fdctrl)
+{
+    return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
+}
+
+static inline fdrive_t *drv1(fdctrl_t *fdctrl)
+{
+    if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
+        return &fdctrl->drives[1];
+    else
+        return &fdctrl->drives[0];
+}
+
+#if MAX_FD == 4
+static inline fdrive_t *drv2(fdctrl_t *fdctrl)
+{
+    if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
+        return &fdctrl->drives[2];
+    else
+        return &fdctrl->drives[1];
+}
+
+static inline fdrive_t *drv3(fdctrl_t *fdctrl)
+{
+    if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
+        return &fdctrl->drives[3];
+    else
+        return &fdctrl->drives[2];
+}
+#endif
+
+static fdrive_t *get_cur_drv(fdctrl_t *fdctrl)
+{
+    switch (fdctrl->cur_drv) {
+        case 0: return drv0(fdctrl);
+        case 1: return drv1(fdctrl);
+#if MAX_FD == 4
+        case 2: return drv2(fdctrl);
+        case 3: return drv3(fdctrl);
+#endif
+        default: return NULL;
+    }
+}
+
+/* Status A register : 0x00 (read-only) */
+static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl)
+{
+    uint32_t retval = fdctrl->sra;
+
+    FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
+
+    return retval;
+}
+
+/* Status B register : 0x01 (read-only) */
+static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl)
+{
+    uint32_t retval = fdctrl->srb;
+
+    FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
+
+    return retval;
+}
+
+/* Digital output register : 0x02 */
+static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl)
+{
+    uint32_t retval = fdctrl->dor;
+
+    /* Selected drive */
+    retval |= fdctrl->cur_drv;
+    FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
+
+    return retval;
+}
+
+static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value)
+{
+    FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
+
+    /* Motors */
+    if (value & FD_DOR_MOTEN0)
+        fdctrl->srb |= FD_SRB_MTR0;
+    else
+        fdctrl->srb &= ~FD_SRB_MTR0;
+    if (value & FD_DOR_MOTEN1)
+        fdctrl->srb |= FD_SRB_MTR1;
+    else
+        fdctrl->srb &= ~FD_SRB_MTR1;
+
+    /* Drive */
+    if (value & 1)
+        fdctrl->srb |= FD_SRB_DR0;
+    else
+        fdctrl->srb &= ~FD_SRB_DR0;
+
+    /* Reset */
+    if (!(value & FD_DOR_nRESET)) {
+        if (fdctrl->dor & FD_DOR_nRESET) {
+            FLOPPY_DPRINTF("controller enter RESET state\n");
+        }
+    } else {
+        if (!(fdctrl->dor & FD_DOR_nRESET)) {
+            FLOPPY_DPRINTF("controller out of RESET state\n");
+            fdctrl_reset(fdctrl, 1);
+            fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+        }
+    }
+    /* Selected drive */
+    fdctrl->cur_drv = value & FD_DOR_SELMASK;
+
+    fdctrl->dor = value;
+}
+
+/* Tape drive register : 0x03 */
+static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl)
+{
+    uint32_t retval = fdctrl->tdr;
+
+    FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
+
+    return retval;
+}
+
+static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value)
+{
+    /* Reset mode */
+    if (!(fdctrl->dor & FD_DOR_nRESET)) {
+        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+        return;
+    }
+    FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
+    /* Disk boot selection indicator */
+    fdctrl->tdr = value & FD_TDR_BOOTSEL;
+    /* Tape indicators: never allow */
+}
+
+/* Main status register : 0x04 (read) */
+static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl)
+{
+    uint32_t retval = fdctrl->msr;
+
+    fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+    fdctrl->dor |= FD_DOR_nRESET;
+
+    FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
+
+    return retval;
+}
+
+/* Data select rate register : 0x04 (write) */
+static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value)
+{
+    /* Reset mode */
+    if (!(fdctrl->dor & FD_DOR_nRESET)) {
+        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+        return;
+    }
+    FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
+    /* Reset: autoclear */
+    if (value & FD_DSR_SWRESET) {
+        fdctrl->dor &= ~FD_DOR_nRESET;
+        fdctrl_reset(fdctrl, 1);
+        fdctrl->dor |= FD_DOR_nRESET;
+    }
+    if (value & FD_DSR_PWRDOWN) {
+        fdctrl_reset(fdctrl, 1);
+    }
+    fdctrl->dsr = value;
+}
+
+/* Configuration control register : 0x07 (write) */
+static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value)
+{
+    /* Reset mode */
+    if (!(fdctrl->dor & FD_DOR_nRESET)) {
+        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+        return;
+    }
+    FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
+
+    /* Only the rate selection bits used in AT mode, and we
+     * store those in the DSR.
+     */
+    fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) | (value & FD_DSR_DRATEMASK);
+}
+
+static int fdctrl_media_changed(fdrive_t *drv)
+{
+#ifdef VBOX
+    return drv->dsk_chg;
+#else
+    int ret;
+
+    if (!drv->bs)
+        return 0;
+    ret = bdrv_media_changed(drv->bs);
+    if (ret) {
+        fd_revalidate(drv);
+    }
+    return ret;
+#endif
+}
+
+/* Digital input register : 0x07 (read-only) */
+static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl)
+{
+    uint32_t retval = 0;
+
+#ifdef VBOX
+    if (fdctrl_media_changed(get_cur_drv(fdctrl)))
+#else
+    if (fdctrl_media_changed(drv0(fdctrl))
+     || fdctrl_media_changed(drv1(fdctrl))
+#if MAX_FD == 4
+     || fdctrl_media_changed(drv2(fdctrl))
+     || fdctrl_media_changed(drv3(fdctrl))
+#endif
+        )
+#endif
+        retval |= FD_DIR_DSKCHG;
+    if (retval != 0)
+        FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
+
+    return retval;
+}
+
+/* FIFO state control */
+static void fdctrl_reset_fifo(fdctrl_t *fdctrl)
+{
+    fdctrl->data_dir = FD_DIR_WRITE;
+    fdctrl->data_pos = 0;
+    fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO);
+}
+
+/* Set FIFO status for the host to read */
+static void fdctrl_set_fifo(fdctrl_t *fdctrl, int fifo_len, int do_irq)
+{
+    fdctrl->data_dir = FD_DIR_READ;
+    fdctrl->data_len = fifo_len;
+    fdctrl->data_pos = 0;
+    fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO;
+    if (do_irq)
+        fdctrl_raise_irq(fdctrl, 0x00);
+}
+
+/* Set an error: unimplemented/unknown command */
+static void fdctrl_unimplemented(fdctrl_t *fdctrl, int direction)
+{
+    FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
+    fdctrl->fifo[0] = FD_SR0_INVCMD;
+    fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+/* Seek to next sector */
+static int fdctrl_seek_to_next_sect(fdctrl_t *fdctrl, fdrive_t *cur_drv)
+{
+    FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
+                   cur_drv->head, cur_drv->track, cur_drv->sect,
+                   fd_sector(cur_drv));
+    /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
+       error in fact */
+    if (cur_drv->sect >= cur_drv->last_sect ||
+        cur_drv->sect == fdctrl->eot) {
+        cur_drv->sect = 1;
+        if (FD_MULTI_TRACK(fdctrl->data_state)) {
+            if (cur_drv->head == 0 &&
+                (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
+                cur_drv->head = 1;
+            } else {
+                cur_drv->head = 0;
+                cur_drv->track++;
+                if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
+                    return 0;
+            }
+        } else {
+            cur_drv->track++;
+            return 0;
+        }
+        FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
+                       cur_drv->head, cur_drv->track,
+                       cur_drv->sect, fd_sector(cur_drv));
+    } else {
+        cur_drv->sect++;
+    }
+    return 1;
+}
+
+/* Callback for transfer end (stop or abort) */
+static void fdctrl_stop_transfer(fdctrl_t *fdctrl, uint8_t status0,
+                                 uint8_t status1, uint8_t status2)
+{
+    fdrive_t *cur_drv;
+
+    cur_drv = get_cur_drv(fdctrl);
+    FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
+                   status0, status1, status2,
+                   status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl));
+    fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
+    fdctrl->fifo[1] = status1;
+    fdctrl->fifo[2] = status2;
+    fdctrl->fifo[3] = cur_drv->track;
+    fdctrl->fifo[4] = cur_drv->head;
+    fdctrl->fifo[5] = cur_drv->sect;
+    fdctrl->fifo[6] = FD_SECTOR_SC;
+    fdctrl->data_dir = FD_DIR_READ;
+    if (!(fdctrl->msr & FD_MSR_NONDMA)) {
+#ifdef VBOX
+        PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 0);
+#else
+        DMA_release_DREQ(fdctrl->dma_chann);
+#endif
+    }
+    fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
+    fdctrl->msr &= ~FD_MSR_NONDMA;
+    fdctrl_set_fifo(fdctrl, 7, 1);
+}
+
+/* Prepare a data transfer (either DMA or FIFO) */
+static void fdctrl_start_transfer(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+    uint8_t kh, kt, ks;
+    int did_seek = 0;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    kt = fdctrl->fifo[2];
+    kh = fdctrl->fifo[3];
+    ks = fdctrl->fifo[4];
+    FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
+                   GET_CUR_DRV(fdctrl), kh, kt, ks,
+                   fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
+    switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
+    case 2:
+        /* sect too big */
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    case 3:
+        /* track too big */
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    case 4:
+        /* No seek enabled */
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    case 1:
+        did_seek = 1;
+        break;
+    default:
+        break;
+    }
+    /* Check the data rate. If the programmed data rate does not match
+     * the currently inserted medium, the operation has to fail.
+     */
+#ifdef VBOX
+    if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
+        FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
+                       fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    }
+#endif
+    /* Set the FIFO state */
+    fdctrl->data_dir = direction;
+    fdctrl->data_pos = 0;
+    fdctrl->msr |= FD_MSR_CMDBUSY;
+    if (fdctrl->fifo[0] & 0x80)
+        fdctrl->data_state |= FD_STATE_MULTI;
+    else
+        fdctrl->data_state &= ~FD_STATE_MULTI;
+    if (did_seek)
+        fdctrl->data_state |= FD_STATE_SEEK;
+    else
+        fdctrl->data_state &= ~FD_STATE_SEEK;
+    if (fdctrl->fifo[5] == 00) {
+        fdctrl->data_len = fdctrl->fifo[8];
+    } else {
+        int tmp;
+        fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
+        tmp = (fdctrl->fifo[6] - ks + 1);
+        if (fdctrl->fifo[0] & 0x80)
+            tmp += fdctrl->fifo[6];
+        fdctrl->data_len *= tmp;
+    }
+    fdctrl->eot = fdctrl->fifo[6];
+    if (fdctrl->dor & FD_DOR_DMAEN) {
+        int dma_mode;
+        /* DMA transfer are enabled. Check if DMA channel is well programmed */
+#ifndef VBOX
+        dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
+#else
+        dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
+#endif
+        dma_mode = (dma_mode >> 2) & 3;
+        FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
+                       dma_mode, direction,
+                       (128 << fdctrl->fifo[5]) *
+                       (cur_drv->last_sect - ks + 1), fdctrl->data_len);
+        if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
+              direction == FD_DIR_SCANH) && dma_mode == 0) ||
+            (direction == FD_DIR_WRITE && dma_mode == 2) ||
+            (direction == FD_DIR_READ && dma_mode == 1)) {
+            /* No access is allowed until DMA transfer has completed */
+            fdctrl->msr &= ~FD_MSR_RQM;
+            /* Now, we just have to wait for the DMA controller to
+             * recall us...
+             */
+#ifndef VBOX
+            DMA_hold_DREQ(fdctrl->dma_chann);
+            DMA_schedule(fdctrl->dma_chann);
+#else
+            PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
+            PDMDevHlpDMASchedule (fdctrl->pDevIns);
+#endif
+            return;
+        } else {
+            FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
+        }
+    }
+    FLOPPY_DPRINTF("start non-DMA transfer\n");
+    fdctrl->msr |= FD_MSR_NONDMA;
+    if (direction != FD_DIR_WRITE)
+        fdctrl->msr |= FD_MSR_DIO;
+    /* IO based transfer: calculate len */
+    fdctrl_raise_irq(fdctrl, 0x00);
+
+    return;
+}
+
+/* Prepare a transfer of deleted data */
+static void fdctrl_start_transfer_del(fdctrl_t *fdctrl, int direction)
+{
+    FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
+
+    /* We don't handle deleted data,
+     * so we don't return *ANYTHING*
+     */
+    fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+}
+
+#ifdef VBOX
+/* Block driver read/write wrappers. */
+
+static int blk_write(fdrive_t *drv, int64_t sector_num, const uint8_t *buf, int nb_sectors)
+{
+    int     rc;
+
+    drv->Led.Asserted.s.fWriting = drv->Led.Actual.s.fWriting = 1;
+
+    rc = drv->pDrvBlock->pfnWrite(drv->pDrvBlock, sector_num * FD_SECTOR_LEN,
+                                  buf, nb_sectors * FD_SECTOR_LEN);
+
+    drv->Led.Actual.s.fWriting = 0;
+    if (RT_FAILURE(rc))
+        AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
+
+    return rc;
+}
+
+static int blk_read(fdrive_t *drv, int64_t sector_num, uint8_t *buf, int nb_sectors)
+{
+    int     rc;
+
+    drv->Led.Asserted.s.fReading = drv->Led.Actual.s.fReading = 1;
+
+    rc = drv->pDrvBlock->pfnRead(drv->pDrvBlock, sector_num * FD_SECTOR_LEN,
+                                 buf, nb_sectors * FD_SECTOR_LEN);
+
+    drv->Led.Actual.s.fReading = 0;
+
+    if (RT_FAILURE(rc))
+        AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
+
+    return rc;
+}
+
+#endif
+
+/* handlers for DMA transfers */
+#ifdef VBOX
+static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
+                                                       void *opaque,
+                                                       unsigned nchan,
+                                                       uint32_t dma_pos,
+                                                       uint32_t dma_len)
+#else
+static int fdctrl_transfer_handler (void *opaque, int nchan,
+                                    int dma_pos, int dma_len)
+#endif
+{
+    fdctrl_t *fdctrl;
+    fdrive_t *cur_drv;
+#ifdef VBOX
+    int rc;
+    uint32_t len, start_pos, rel_pos;
+#else
+    int len, start_pos, rel_pos;
+#endif
+    uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
+
+    fdctrl = (fdctrl_t *)opaque;
+    if (fdctrl->msr & FD_MSR_RQM) {
+        FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
+        return 0;
+    }
+    cur_drv = get_cur_drv(fdctrl);
+    if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
+        fdctrl->data_dir == FD_DIR_SCANH)
+        status2 = FD_SR2_SNS;
+    if (dma_len > fdctrl->data_len)
+        dma_len = fdctrl->data_len;
+#ifndef VBOX
+    if (cur_drv->bs == NULL)
+#else  /* !VBOX */
+    if (cur_drv->pDrvBlock == NULL)
+#endif
+    {
+        if (fdctrl->data_dir == FD_DIR_WRITE)
+            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+        else
+            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+        len = 0;
+        goto transfer_error;
+    }
+    rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
+    for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
+        len = dma_len - fdctrl->data_pos;
+        if (len + rel_pos > FD_SECTOR_LEN)
+            len = FD_SECTOR_LEN - rel_pos;
+        FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
+                       "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
+                       fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
+                       cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
+                       fd_sector(cur_drv) * FD_SECTOR_LEN);
+        if (fdctrl->data_dir != FD_DIR_WRITE ||
+            len < FD_SECTOR_LEN || rel_pos != 0) {
+            /* READ & SCAN commands and realign to a sector for WRITE */
+#ifdef VBOX
+            rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+            if (RT_FAILURE(rc))
+#else
+            if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
+                          fdctrl->fifo, 1) < 0)
+#endif
+            {
+                FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
+                               fd_sector(cur_drv));
+                /* Sure, image size is too small... */
+                memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
+            }
+        }
+        switch (fdctrl->data_dir) {
+        case FD_DIR_READ:
+            /* READ commands */
+#ifdef VBOX
+            {
+                uint32_t read;
+                int rc2 = PDMDevHlpDMAWriteMemory(fdctrl->pDevIns, nchan,
+                                                  fdctrl->fifo + rel_pos,
+                                                  fdctrl->data_pos,
+                                                  len, &read);
+                AssertMsgRC (rc2, ("DMAWriteMemory -> %Rrc\n", rc2));
+            }
+#else
+            DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
+                              fdctrl->data_pos, len);
+#endif
+/*          cpu_physical_memory_write(addr + fdctrl->data_pos, */
+/*                                    fdctrl->fifo + rel_pos, len); */
+            break;
+        case FD_DIR_WRITE:
+            /* WRITE commands */
+#ifdef VBOX
+            if (cur_drv->ro)
+            {
+                /* Handle readonly medium early, no need to do DMA, touch the
+                 * LED or attempt any writes. A real floppy doesn't attempt
+                 * to write to readonly media either. */
+                fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW,
+                                     0x00);
+                goto transfer_error;
+            }
+
+            {
+                uint32_t written;
+                int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
+                                                 fdctrl->fifo + rel_pos,
+                                                 fdctrl->data_pos,
+                                                 len, &written);
+                AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
+            }
+
+            rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+            if (RT_FAILURE(rc))
+#else
+            DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
+                             fdctrl->data_pos, len);
+            if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
+                           fdctrl->fifo, 1) < 0)
+#endif
+            {
+                FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
+                fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+                goto transfer_error;
+            }
+            break;
+        default:
+            /* SCAN commands */
+            {
+                uint8_t tmpbuf[FD_SECTOR_LEN];
+                int ret;
+#ifdef VBOX
+                uint32_t read;
+                int rc2 = PDMDevHlpDMAReadMemory (fdctrl->pDevIns, nchan, tmpbuf,
+                                                  fdctrl->data_pos, len, &read);
+                AssertMsg (RT_SUCCESS (rc2), ("DMAReadMemory -> %Rrc2\n", rc2));
+#else
+                DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
+#endif
+                ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
+                if (ret == 0) {
+                    status2 = FD_SR2_SEH;
+                    goto end_transfer;
+                }
+                if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
+                    (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
+                    status2 = 0x00;
+                    goto end_transfer;
+                }
+            }
+            break;
+        }
+        fdctrl->data_pos += len;
+        rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
+        if (rel_pos == 0) {
+            /* Seek to next sector */
+            if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
+                break;
+        }
+    }
+end_transfer:
+    len = fdctrl->data_pos - start_pos;
+    FLOPPY_DPRINTF("end transfer %d %d %d\n",
+                   fdctrl->data_pos, len, fdctrl->data_len);
+    if (fdctrl->data_dir == FD_DIR_SCANE ||
+        fdctrl->data_dir == FD_DIR_SCANL ||
+        fdctrl->data_dir == FD_DIR_SCANH)
+        status2 = FD_SR2_SEH;
+    if (FD_DID_SEEK(fdctrl->data_state))
+        status0 |= FD_SR0_SEEK;
+    fdctrl->data_len -= len;
+    fdctrl_stop_transfer(fdctrl, status0, status1, status2);
+transfer_error:
+
+    return len;
+}
+
+/* Data register : 0x05 */
+static uint32_t fdctrl_read_data(fdctrl_t *fdctrl)
+{
+    fdrive_t *cur_drv;
+    uint32_t retval = 0;
+    unsigned pos;
+#ifdef VBOX
+    int rc;
+#endif
+
+    cur_drv = get_cur_drv(fdctrl);
+    fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+    if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) {
+        FLOPPY_ERROR("controller not ready for reading\n");
+        return 0;
+    }
+    pos = fdctrl->data_pos;
+    if (fdctrl->msr & FD_MSR_NONDMA) {
+        pos %= FD_SECTOR_LEN;
+        if (pos == 0) {
+            if (fdctrl->data_pos != 0)
+                if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
+                    FLOPPY_DPRINTF("error seeking to next sector %d\n",
+                                   fd_sector(cur_drv));
+                    return 0;
+                }
+#ifdef VBOX
+            rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+            if (RT_FAILURE(rc))
+#else
+            if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0)
+#endif
+            {
+                FLOPPY_DPRINTF("error getting sector %d\n",
+                               fd_sector(cur_drv));
+                /* Sure, image size is too small... */
+                memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
+            }
+        }
+    }
+    retval = fdctrl->fifo[pos];
+    if (++fdctrl->data_pos == fdctrl->data_len) {
+        fdctrl->data_pos = 0;
+        /* Switch from transfer mode to status mode
+         * then from status mode to command mode
+         */
+        if (fdctrl->msr & FD_MSR_NONDMA) {
+            fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
+        } else {
+            fdctrl_reset_fifo(fdctrl);
+            fdctrl_reset_irq(fdctrl);
+        }
+    }
+    FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
+
+    return retval;
+}
+
+static void fdctrl_format_sector(fdctrl_t *fdctrl)
+{
+    fdrive_t *cur_drv;
+    uint8_t kh, kt, ks;
+#ifdef VBOX
+    int ok = 0, rc;
+#endif
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    kt = fdctrl->fifo[6];
+    kh = fdctrl->fifo[7];
+    ks = fdctrl->fifo[8];
+    FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
+                   GET_CUR_DRV(fdctrl), kh, kt, ks,
+                   fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
+    switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
+    case 2:
+        /* sect too big */
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    case 3:
+        /* track too big */
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    case 4:
+        /* No seek enabled */
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+        fdctrl->fifo[3] = kt;
+        fdctrl->fifo[4] = kh;
+        fdctrl->fifo[5] = ks;
+        return;
+    case 1:
+        fdctrl->data_state |= FD_STATE_SEEK;
+        break;
+    default:
+        break;
+    }
+    memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
+#ifdef VBOX
+    if (cur_drv->pDrvBlock) {
+        rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+        if (RT_FAILURE (rc)) {
+            FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
+            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+        } else {
+            ok = 1;
+        }
+    }
+    if (ok) {
+#else
+    if (cur_drv->bs == NULL ||
+        bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
+        FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+    } else {
+#endif
+        if (cur_drv->sect == cur_drv->last_sect) {
+            fdctrl->data_state &= ~FD_STATE_FORMAT;
+            /* Last sector done */
+            if (FD_DID_SEEK(fdctrl->data_state))
+                fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
+            else
+                fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
+        } else {
+            /* More to do */
+            fdctrl->data_pos = 0;
+            fdctrl->data_len = 4;
+        }
+    }
+}
+
+static void fdctrl_handle_lock(fdctrl_t *fdctrl, int direction)
+{
+    fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
+    fdctrl->fifo[0] = fdctrl->lock << 4;
+    fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_dumpreg(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    /* Drives position */
+    fdctrl->fifo[0] = drv0(fdctrl)->track;
+    fdctrl->fifo[1] = drv1(fdctrl)->track;
+#if MAX_FD == 4
+    fdctrl->fifo[2] = drv2(fdctrl)->track;
+    fdctrl->fifo[3] = drv3(fdctrl)->track;
+#else
+    fdctrl->fifo[2] = 0;
+    fdctrl->fifo[3] = 0;
+#endif
+    /* timers */
+    fdctrl->fifo[4] = fdctrl->timer0;
+    fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
+    fdctrl->fifo[6] = cur_drv->last_sect;
+    fdctrl->fifo[7] = (fdctrl->lock << 7) |
+        (cur_drv->perpendicular << 2);
+    fdctrl->fifo[8] = fdctrl->config;
+    fdctrl->fifo[9] = fdctrl->precomp_trk;
+    fdctrl_set_fifo(fdctrl, 10, 0);
+}
+
+static void fdctrl_handle_version(fdctrl_t *fdctrl, int direction)
+{
+    /* Controller's version */
+    fdctrl->fifo[0] = fdctrl->version;
+    fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_partid(fdctrl_t *fdctrl, int direction)
+{
+    fdctrl->fifo[0] = 0x01; /* Stepping 1 */
+    fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_restore(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    /* Drives position */
+    drv0(fdctrl)->track = fdctrl->fifo[3];
+    drv1(fdctrl)->track = fdctrl->fifo[4];
+#if MAX_FD == 4
+    drv2(fdctrl)->track = fdctrl->fifo[5];
+    drv3(fdctrl)->track = fdctrl->fifo[6];
+#endif
+    /* timers */
+    fdctrl->timer0 = fdctrl->fifo[7];
+    fdctrl->timer1 = fdctrl->fifo[8];
+    cur_drv->last_sect = fdctrl->fifo[9];
+    fdctrl->lock = fdctrl->fifo[10] >> 7;
+    cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
+    fdctrl->config = fdctrl->fifo[11];
+    fdctrl->precomp_trk = fdctrl->fifo[12];
+    fdctrl->pwrd = fdctrl->fifo[13];
+    fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_save(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    fdctrl->fifo[0] = 0;
+    fdctrl->fifo[1] = 0;
+    /* Drives position */
+    fdctrl->fifo[2] = drv0(fdctrl)->track;
+    fdctrl->fifo[3] = drv1(fdctrl)->track;
+#if MAX_FD == 4
+    fdctrl->fifo[4] = drv2(fdctrl)->track;
+    fdctrl->fifo[5] = drv3(fdctrl)->track;
+#else
+    fdctrl->fifo[4] = 0;
+    fdctrl->fifo[5] = 0;
+#endif
+    /* timers */
+    fdctrl->fifo[6] = fdctrl->timer0;
+    fdctrl->fifo[7] = fdctrl->timer1;
+    fdctrl->fifo[8] = cur_drv->last_sect;
+    fdctrl->fifo[9] = (fdctrl->lock << 7) |
+        (cur_drv->perpendicular << 2);
+    fdctrl->fifo[10] = fdctrl->config;
+    fdctrl->fifo[11] = fdctrl->precomp_trk;
+    fdctrl->fifo[12] = fdctrl->pwrd;
+    fdctrl->fifo[13] = 0;
+    fdctrl->fifo[14] = 0;
+    fdctrl_set_fifo(fdctrl, 15, 0);
+}
+
+static void fdctrl_handle_readid(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    /* XXX: should set main status register to busy */
+    cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
+#ifdef VBOX
+    TMTimerSetMillies(fdctrl->result_timer, 1000 / 50);
+#else
+    qemu_mod_timer(fdctrl->result_timer,
+                   qemu_get_clock(vm_clock) + (get_ticks_per_sec() / 50));
+#endif
+}
+
+static void fdctrl_handle_format_track(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    fdctrl->data_state |= FD_STATE_FORMAT;
+    if (fdctrl->fifo[0] & 0x80)
+        fdctrl->data_state |= FD_STATE_MULTI;
+    else
+        fdctrl->data_state &= ~FD_STATE_MULTI;
+    fdctrl->data_state &= ~FD_STATE_SEEK;
+    cur_drv->bps =
+        fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
+#if 0
+    cur_drv->last_sect =
+        cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
+        fdctrl->fifo[3] / 2;
+#else
+    cur_drv->last_sect = fdctrl->fifo[3];
+#endif
+    /* TODO: implement format using DMA expected by the Bochs BIOS
+     * and Linux fdformat (read 3 bytes per sector via DMA and fill
+     * the sector with the specified fill byte
+     */
+    fdctrl->data_state &= ~FD_STATE_FORMAT;
+    fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
+}
+
+static void fdctrl_handle_specify(fdctrl_t *fdctrl, int direction)
+{
+    fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
+    fdctrl->timer1 = fdctrl->fifo[2] >> 1;
+    if (fdctrl->fifo[2] & 1)
+        fdctrl->dor &= ~FD_DOR_DMAEN;
+    else
+        fdctrl->dor |= FD_DOR_DMAEN;
+    /* No result back */
+    fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_sense_drive_status(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
+    /* 1 Byte status back */
+    fdctrl->fifo[0] = (cur_drv->ro << 6) |
+        (cur_drv->track == 0 ? 0x10 : 0x00) |
+        (cur_drv->head << 2) |
+        GET_CUR_DRV(fdctrl) |
+        0x28;
+    fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_recalibrate(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    fd_recalibrate(cur_drv);
+    fdctrl_reset_fifo(fdctrl);
+    /* Raise Interrupt */
+    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+}
+
+static void fdctrl_handle_sense_interrupt_status(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    if(fdctrl->reset_sensei > 0) {
+        fdctrl->fifo[0] =
+            FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
+        fdctrl->reset_sensei--;
+    } else {
+        /* XXX: status0 handling is broken for read/write
+           commands, so we do this hack. It should be suppressed
+           ASAP */
+        fdctrl->fifo[0] =
+            FD_SR0_SEEK | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
+    }
+
+    fdctrl->fifo[1] = cur_drv->track;
+    fdctrl_set_fifo(fdctrl, 2, 0);
+    fdctrl_reset_irq(fdctrl);
+    fdctrl->status0 = FD_SR0_RDYCHG;
+}
+
+static void fdctrl_handle_seek(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    fdctrl_reset_fifo(fdctrl);
+#ifdef VBOX
+    /* The seek command just sends step pulses to the drive and doesn't care if
+     * there's a medium inserted or if it's banging the head against the drive.
+     */
+    cur_drv->track = fdctrl->fifo[2];
+    /* Raise Interrupt */
+    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+#else
+    if (fdctrl->fifo[2] > cur_drv->max_track) {
+        fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK);
+    } else {
+        cur_drv->track = fdctrl->fifo[2];
+        /* Raise Interrupt */
+        fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+    }
+#endif
+}
+
+static void fdctrl_handle_perpendicular_mode(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    if (fdctrl->fifo[1] & 0x80)
+        cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
+    /* No result back */
+    fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_configure(fdctrl_t *fdctrl, int direction)
+{
+    fdctrl->config = fdctrl->fifo[2];
+    fdctrl->precomp_trk =  fdctrl->fifo[3];
+    /* No result back */
+    fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_powerdown_mode(fdctrl_t *fdctrl, int direction)
+{
+    fdctrl->pwrd = fdctrl->fifo[1];
+    fdctrl->fifo[0] = fdctrl->fifo[1];
+    fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_option(fdctrl_t *fdctrl, int direction)
+{
+    /* No result back */
+    fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_drive_specification_command(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
+        /* Command parameters done */
+        if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
+            fdctrl->fifo[0] = fdctrl->fifo[1];
+            fdctrl->fifo[2] = 0;
+            fdctrl->fifo[3] = 0;
+            fdctrl_set_fifo(fdctrl, 4, 0);
+        } else {
+            fdctrl_reset_fifo(fdctrl);
+        }
+    } else if (fdctrl->data_len > 7) {
+        /* ERROR */
+        fdctrl->fifo[0] = 0x80 |
+            (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
+        fdctrl_set_fifo(fdctrl, 1, 0);
+    }
+}
+
+static void fdctrl_handle_relative_seek_out(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
+        cur_drv->track = cur_drv->max_track - 1;
+    } else {
+        cur_drv->track += fdctrl->fifo[2];
+    }
+    fdctrl_reset_fifo(fdctrl);
+    /* Raise Interrupt */
+    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+}
+
+static void fdctrl_handle_relative_seek_in(fdctrl_t *fdctrl, int direction)
+{
+    fdrive_t *cur_drv;
+
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+    cur_drv = get_cur_drv(fdctrl);
+    if (fdctrl->fifo[2] > cur_drv->track) {
+        cur_drv->track = 0;
+    } else {
+        cur_drv->track -= fdctrl->fifo[2];
+    }
+    fdctrl_reset_fifo(fdctrl);
+    /* Raise Interrupt */
+    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+}
+
+static const struct {
+    uint8_t value;
+    uint8_t mask;
+    const char* name;
+    int parameters;
+    void (*handler)(fdctrl_t *fdctrl, int direction);
+    int direction;
+} handlers[] = {
+    { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
+    { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
+    { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
+    { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
+    { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
+    { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
+    { FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
+    { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
+    { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
+    { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
+    { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
+    { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
+    { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
+    { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
+    { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
+    { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
+    { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
+    { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
+    { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
+    { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
+    { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
+    { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
+    { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command },
+    { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
+    { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
+    { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
+    { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
+    { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
+    { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
+    { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
+    { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
+    { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
+};
+/* Associate command to an index in the 'handlers' array */
+static uint8_t command_to_handler[256];
+
+static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value)
+{
+    fdrive_t *cur_drv;
+    int pos;
+
+    cur_drv = get_cur_drv(fdctrl);
+    /* Reset mode */
+    if (!(fdctrl->dor & FD_DOR_nRESET)) {
+        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+        return;
+    }
+    if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) {
+        FLOPPY_ERROR("controller not ready for writing\n");
+        return;
+    }
+    fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+    /* Is it write command time ? */
+    if (fdctrl->msr & FD_MSR_NONDMA) {
+        /* FIFO data write */
+        pos = fdctrl->data_pos++;
+        pos %= FD_SECTOR_LEN;
+        fdctrl->fifo[pos] = value;
+        if (pos == FD_SECTOR_LEN - 1 ||
+            fdctrl->data_pos == fdctrl->data_len) {
+#ifdef VBOX
+            blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+#else
+            bdrv_write(cur_drv->bs, fd_sector(cur_drv),
+                       fdctrl->fifo, 1);
+#endif
+        }
+        /* Switch from transfer mode to status mode
+         * then from status mode to command mode
+         */
+        if (fdctrl->data_pos == fdctrl->data_len)
+            fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
+        return;
+    }
+    if (fdctrl->data_pos == 0) {
+        /* Command */
+        pos = command_to_handler[value & 0xff];
+        FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
+        fdctrl->data_len = handlers[pos].parameters + 1;
+        fdctrl->msr |= FD_MSR_CMDBUSY;
+    }
+
+    FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
+    fdctrl->fifo[fdctrl->data_pos++] = value;
+    if (fdctrl->data_pos == fdctrl->data_len) {
+        /* We now have all parameters
+         * and will be able to treat the command
+         */
+        if (fdctrl->data_state & FD_STATE_FORMAT) {
+            fdctrl_format_sector(fdctrl);
+            return;
+        }
+
+        pos = command_to_handler[fdctrl->fifo[0] & 0xff];
+        FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
+        (*handlers[pos].handler)(fdctrl, handlers[pos].direction);
+    }
+}
+
+static void fdctrl_result_timer(void *opaque)
+{
+    fdctrl_t *fdctrl = (fdctrl_t *)opaque;
+    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+    /* Pretend we are spinning.
+     * This is needed for Coherent, which uses READ ID to check for
+     * sector interleaving.
+     */
+    if (cur_drv->last_sect != 0) {
+        cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
+    }
+    /* READ_ID can't automatically succeed! */
+#ifdef VBOX
+    if (/* !cur_drv->fMediaPresent || */
+        ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate)) {
+        FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
+                       fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
+        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
+    }
+    else
+#endif
+        fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
+}
+
+#ifdef VBOX
+static DECLCALLBACK(void) fdc_timer (PPDMDEVINS pDevIns, PTMTIMER pTimer, void *pvUser)
+{
+    fdctrl_t *fdctrl = (fdctrl_t *)pvUser;
+    fdctrl_result_timer (fdctrl);
+}
+
+static DECLCALLBACK(int) fdc_io_write (PPDMDEVINS pDevIns,
+                                       void *pvUser,
+                                       RTIOPORT Port,
+                                       uint32_t u32,
+                                       unsigned cb)
+{
+    if (cb == 1) {
+        fdctrl_write (pvUser, Port & 7, u32);
+    }
+    else {
+        AssertMsgFailed(("Port=%#x cb=%d u32=%#x\n", Port, cb, u32));
+    }
+    return VINF_SUCCESS;
+}
+
+static DECLCALLBACK(int) fdc_io_read (PPDMDEVINS pDevIns,
+                                      void *pvUser,
+                                      RTIOPORT Port,
+                                      uint32_t *pu32,
+                                      unsigned cb)
+{
+    if (cb == 1) {
+        *pu32 = fdctrl_read (pvUser, Port & 7);
+        return VINF_SUCCESS;
+    }
+    else {
+        return VERR_IOM_IOPORT_UNUSED;
+    }
+}
+
+static DECLCALLBACK(int) fdcSaveExec (PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle)
+{
+    fdctrl_t *s = PDMINS_2_DATA (pDevIns, fdctrl_t *);
+    QEMUFile *f = pSSMHandle;
+    unsigned int i;
+
+    /* Save the FDC I/O registers... */
+    SSMR3PutU8(pSSMHandle, s->sra);
+    SSMR3PutU8(pSSMHandle, s->srb);
+    SSMR3PutU8(pSSMHandle, s->dor);
+    SSMR3PutU8(pSSMHandle, s->tdr);
+    SSMR3PutU8(pSSMHandle, s->dsr);
+    SSMR3PutU8(pSSMHandle, s->msr);
+    /* ...the status registers... */
+    SSMR3PutU8(pSSMHandle, s->status0);
+    SSMR3PutU8(pSSMHandle, s->status1);
+    SSMR3PutU8(pSSMHandle, s->status2);
+    /* ...the command FIFO... */
+    SSMR3PutU32(pSSMHandle, sizeof(s->fifo));
+    SSMR3PutMem(pSSMHandle, &s->fifo, sizeof(s->fifo));
+    SSMR3PutU32(pSSMHandle, s->data_pos);
+    SSMR3PutU32(pSSMHandle, s->data_len);
+    SSMR3PutU8(pSSMHandle, s->data_state);
+    SSMR3PutU8(pSSMHandle, s->data_dir);
+    /* ...and miscellaneous internal FDC state. */
+    SSMR3PutU8(pSSMHandle, s->reset_sensei);
+    SSMR3PutU8(pSSMHandle, s->eot);
+    SSMR3PutU8(pSSMHandle, s->timer0);
+    SSMR3PutU8(pSSMHandle, s->timer1);
+    SSMR3PutU8(pSSMHandle, s->precomp_trk);
+    SSMR3PutU8(pSSMHandle, s->config);
+    SSMR3PutU8(pSSMHandle, s->lock);
+    SSMR3PutU8(pSSMHandle, s->pwrd);
+    SSMR3PutU8(pSSMHandle, s->version);
+
+    /* Save the number of drives and per-drive state. Note that the media
+     * states will be updated in fd_revalidate() and need not be saved.
+     */
+    SSMR3PutU8(pSSMHandle, s->num_floppies);
+    Assert(RT_ELEMENTS(s->drives) == s->num_floppies);
+    for (i = 0; i < s->num_floppies; ++i) {
+        fdrive_t *d = &s->drives[i];
+
+        SSMR3PutMem(pSSMHandle, &d->Led, sizeof(d->Led));
+        SSMR3PutU32(pSSMHandle, d->drive);
+        SSMR3PutU8(pSSMHandle, d->dsk_chg);
+        SSMR3PutU8(pSSMHandle, d->perpendicular);
+        SSMR3PutU8(pSSMHandle, d->head);
+        SSMR3PutU8(pSSMHandle, d->track);
+        SSMR3PutU8(pSSMHandle, d->sect);
+    }
+    return TMR3TimerSave (s->result_timer, pSSMHandle);
+}
+
+static DECLCALLBACK(int) fdcLoadExec (PPDMDEVINS pDevIns,
+                                      PSSMHANDLE pSSMHandle,
+                                      uint32_t uVersion,
+                                      uint32_t uPass)
+{
+    fdctrl_t *s = PDMINS_2_DATA (pDevIns, fdctrl_t *);
+    QEMUFile *f = pSSMHandle;
+    unsigned int i;
+    uint32_t val32;
+    uint8_t val8;
+
+    if (uVersion > FDC_SAVESTATE_CURRENT)
+        return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
+    Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
+
+    /* The old saved state was significantly different. However, we can get
+     * back most of the controller state and fix the rest by pretending the
+     * disk in the drive (if any) has been replaced. At any rate there should
+     * be no difficulty unless the state was saved during a floppy operation.
+     */
+    if (uVersion == FDC_SAVESTATE_OLD)
+    {
+        /* First verify a few assumptions. */
+        AssertMsgReturn(sizeof(s->fifo) == FD_SECTOR_LEN,
+                        ("The size of FIFO in saved state doesn't match!\n"),
+                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+        AssertMsgReturn(RT_ELEMENTS(s->drives) == 2,
+                        ("The number of drives in old saved state doesn't match!\n"),
+                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+        /* Now load the old state. */
+        SSMR3GetU8(pSSMHandle, &s->version);
+        /* Toss IRQ level, DMA channel, I/O base, and state. */
+        SSMR3GetU8(pSSMHandle, &val8);
+        SSMR3GetU8(pSSMHandle, &val8);
+        SSMR3GetU32(pSSMHandle, &val32);
+        SSMR3GetU8(pSSMHandle, &val8);
+        /* Translate dma_en. */
+        SSMR3GetU8(pSSMHandle, &val8);
+        if (val8)
+            s->dor |= FD_DOR_DMAEN;
+        SSMR3GetU8(pSSMHandle, &s->cur_drv);
+        /* Translate bootsel. */
+        SSMR3GetU8(pSSMHandle, &val8);
+        s->tdr |= val8 << 2;
+        SSMR3GetMem(pSSMHandle, &s->fifo, FD_SECTOR_LEN);
+        SSMR3GetU32(pSSMHandle, &s->data_pos);
+        SSMR3GetU32(pSSMHandle, &s->data_len);
+        SSMR3GetU8(pSSMHandle, &s->data_state);
+        SSMR3GetU8(pSSMHandle, &s->data_dir);
+        SSMR3GetU8(pSSMHandle, &s->status0);
+        SSMR3GetU8(pSSMHandle, &s->eot);
+        SSMR3GetU8(pSSMHandle, &s->timer0);
+        SSMR3GetU8(pSSMHandle, &s->timer1);
+        SSMR3GetU8(pSSMHandle, &s->precomp_trk);
+        SSMR3GetU8(pSSMHandle, &s->config);
+        SSMR3GetU8(pSSMHandle, &s->lock);
+        SSMR3GetU8(pSSMHandle, &s->pwrd);
+
+        for (i = 0; i < 2; ++i) {
+            fdrive_t *d = &s->drives[i];
+
+            SSMR3GetMem (pSSMHandle, &d->Led, sizeof (d->Led));
+            SSMR3GetU32(pSSMHandle, &val32);
+            d->drive = (fdrive_type_t)val32;
+            SSMR3GetU32(pSSMHandle, &val32);    /* Toss drflags */
+            SSMR3GetU8(pSSMHandle, &d->perpendicular);
+            SSMR3GetU8(pSSMHandle, &d->head);
+            SSMR3GetU8(pSSMHandle, &d->track);
+            SSMR3GetU8(pSSMHandle, &d->sect);
+            SSMR3GetU8(pSSMHandle, &val8);      /* Toss dir, rw */
+            SSMR3GetU8(pSSMHandle, &val8);
+            SSMR3GetU32(pSSMHandle, &val32);
+            d->flags = (fdrive_flags_t)val32;
+            SSMR3GetU8(pSSMHandle, &d->last_sect);
+            SSMR3GetU8(pSSMHandle, &d->max_track);
+            SSMR3GetU16(pSSMHandle, &d->bps);
+            SSMR3GetU8(pSSMHandle, &d->ro);
+        }
+    }
+    else    /* New state - straightforward. */
+    {
+        Assert(uVersion == FDC_SAVESTATE_CURRENT);
+        /* Load the FDC I/O registers... */
+        SSMR3GetU8(pSSMHandle, &s->sra);
+        SSMR3GetU8(pSSMHandle, &s->srb);
+        SSMR3GetU8(pSSMHandle, &s->dor);
+        SSMR3GetU8(pSSMHandle, &s->tdr);
+        SSMR3GetU8(pSSMHandle, &s->dsr);
+        SSMR3GetU8(pSSMHandle, &s->msr);
+        /* ...the status registers... */
+        SSMR3GetU8(pSSMHandle, &s->status0);
+        SSMR3GetU8(pSSMHandle, &s->status1);
+        SSMR3GetU8(pSSMHandle, &s->status2);
+        /* ...the command FIFO, if the size matches... */
+        SSMR3GetU32(pSSMHandle, &val32);
+        AssertMsgReturn(sizeof(s->fifo) == val32,
+                        ("The size of FIFO in saved state doesn't match!\n"),
+                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+        SSMR3GetMem(pSSMHandle, &s->fifo, sizeof(s->fifo));
+        SSMR3GetU32(pSSMHandle, &s->data_pos);
+        SSMR3GetU32(pSSMHandle, &s->data_len);
+        SSMR3GetU8(pSSMHandle, &s->data_state);
+        SSMR3GetU8(pSSMHandle, &s->data_dir);
+        /* ...and miscellaneous internal FDC state. */
+        SSMR3GetU8(pSSMHandle, &s->reset_sensei);
+        SSMR3GetU8(pSSMHandle, &s->eot);
+        SSMR3GetU8(pSSMHandle, &s->timer0);
+        SSMR3GetU8(pSSMHandle, &s->timer1);
+        SSMR3GetU8(pSSMHandle, &s->precomp_trk);
+        SSMR3GetU8(pSSMHandle, &s->config);
+        SSMR3GetU8(pSSMHandle, &s->lock);
+        SSMR3GetU8(pSSMHandle, &s->pwrd);
+        SSMR3GetU8(pSSMHandle, &s->version);
+
+        /* Validate the number of drives. */
+        SSMR3GetU8(pSSMHandle, &s->num_floppies);
+        AssertMsgReturn(RT_ELEMENTS(s->drives) == s->num_floppies,
+                        ("The number of drives in saved state doesn't match!\n"),
+                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+
+        /* Load the per-drive state. */
+        for (i = 0; i < s->num_floppies; ++i) {
+            fdrive_t *d = &s->drives[i];
+
+            SSMR3GetMem(pSSMHandle, &d->Led, sizeof(d->Led));
+            SSMR3GetU32(pSSMHandle, &val32);
+            d->drive = (fdrive_type_t)val32;
+            SSMR3GetU8(pSSMHandle, &d->dsk_chg);
+            SSMR3GetU8(pSSMHandle, &d->perpendicular);
+            SSMR3GetU8(pSSMHandle, &d->head);
+            SSMR3GetU8(pSSMHandle, &d->track);
+            SSMR3GetU8(pSSMHandle, &d->sect);
+        }
+    }
+    return TMR3TimerLoad (s->result_timer, pSSMHandle);
+}
+
+/**
+ * @interface_method_impl{PDMIBASE,pfnQueryInterface}
+ */
+static DECLCALLBACK(void *) fdQueryInterface (PPDMIBASE pInterface, const char *pszIID)
+{
+    fdrive_t *pDrive = PDMIBASE_2_FDRIVE(pInterface);
+
+    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrive->IBase);
+    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBLOCKPORT, &pDrive->IPort);
+    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUNTNOTIFY, &pDrive->IMountNotify);
+    return NULL;
+}
+
+/**
+ * Gets the pointer to the status LED of a unit.
+ *
+ * @returns VBox status code.
+ * @param   pInterface      Pointer to the interface structure containing the called function pointer.
+ * @param   iLUN            The unit which status LED we desire.
+ * @param   ppLed           Where to store the LED pointer.
+ */
+static DECLCALLBACK(int) fdcStatusQueryStatusLed (PPDMILEDPORTS pInterface,
+                                                  unsigned iLUN,
+                                                  PPDMLED *ppLed)
+{
+    fdctrl_t *fdctrl = (fdctrl_t *)
+        ((uintptr_t )pInterface - RT_OFFSETOF (fdctrl_t, ILeds));
+    if (iLUN < RT_ELEMENTS(fdctrl->drives)) {
+        *ppLed = &fdctrl->drives[iLUN].Led;
+        Assert ((*ppLed)->u32Magic == PDMLED_MAGIC);
+        return VINF_SUCCESS;
+    }
+    return VERR_PDM_LUN_NOT_FOUND;
+}
+
+
+/**
+ * @interface_method_impl{PDMIBASE,pfnQueryInterface}
+ */
+static DECLCALLBACK(void *) fdcStatusQueryInterface(PPDMIBASE pInterface, const char *pszIID)
+{
+    fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, IBaseStatus);
+
+    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThis->IBaseStatus);
+    PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThis->ILeds);
+    return NULL;
+}
+
+
+/**
+ * Configure a drive.
+ *
+ * @returns VBox status code.
+ * @param   drv         The drive in question.
+ * @param   pDevIns     The driver instance.
+ */
+static int fdConfig (fdrive_t *drv, PPDMDEVINS pDevIns)
+{
+    static const char *descs[] = {"Floppy Drive A:", "Floppy Drive B"};
+    int rc;
+
+    /*
+     * Reset the LED just to be on the safe side.
+     */
+    Assert (RT_ELEMENTS(descs) > drv->iLUN);
+    Assert (drv->Led.u32Magic == PDMLED_MAGIC);
+    drv->Led.Actual.u32 = 0;
+    drv->Led.Asserted.u32 = 0;
+
+    /*
+     * Try attach the block device and get the interfaces.
+     */
+    rc = PDMDevHlpDriverAttach (pDevIns, drv->iLUN, &drv->IBase, &drv->pDrvBase, descs[drv->iLUN]);
+    if (RT_SUCCESS (rc)) {
+        drv->pDrvBlock = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIBLOCK);
+        if (drv->pDrvBlock) {
+            drv->pDrvBlockBios = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIBLOCKBIOS);
+            if (drv->pDrvBlockBios) {
+                drv->pDrvMount = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMOUNT);
+                if (drv->pDrvMount) {
+                    fd_init(drv);
+                } else {
+                    AssertMsgFailed (("Configuration error: LUN#%d without mountable interface!\n", drv->iLUN));
+                    rc = VERR_PDM_MISSING_INTERFACE;
+                }
+
+            } else {
+                AssertMsgFailed (("Configuration error: LUN#%d hasn't a block BIOS interface!\n", drv->iLUN));
+                rc = VERR_PDM_MISSING_INTERFACE;
+            }
+
+        } else {
+            AssertMsgFailed (("Configuration error: LUN#%d hasn't a block interface!\n", drv->iLUN));
+            rc = VERR_PDM_MISSING_INTERFACE;
+        }
+    } else {
+        AssertMsg (rc == VERR_PDM_NO_ATTACHED_DRIVER,
+                   ("Failed to attach LUN#%d. rc=%Rrc\n", drv->iLUN, rc));
+        switch (rc) {
+        case VERR_ACCESS_DENIED:
+            /* Error already cached by DrvHostBase */
+            break;
+        case VERR_PDM_NO_ATTACHED_DRIVER:
+            /* Legal on architectures without a floppy controller */
+            break;
+        default:
+            rc = PDMDevHlpVMSetError (pDevIns, rc, RT_SRC_POS,
+                                      N_ ("The floppy controller cannot attach to the floppy drive"));
+            break;
+        }
+    }
+
+    if (RT_FAILURE (rc)) {
+        drv->pDrvBase = NULL;
+        drv->pDrvBlock = NULL;
+        drv->pDrvBlockBios = NULL;
+        drv->pDrvMount = NULL;
+    }
+    LogFlow (("fdConfig: returns %Rrc\n", rc));
+    return rc;
+}
+
+
+/**
+ * Attach command.
+ *
+ * This is called when we change block driver for a floppy drive.
+ *
+ * @returns VBox status code.
+ * @param   pDevIns     The device instance.
+ * @param   iLUN        The logical unit which is being detached.
+ */
+static DECLCALLBACK(int)  fdcAttach (PPDMDEVINS pDevIns,
+                                     unsigned iLUN, uint32_t fFlags)
+{
+    fdctrl_t *fdctrl = PDMINS_2_DATA (pDevIns, fdctrl_t *);
+    fdrive_t *drv;
+    int rc;
+    LogFlow (("ideDetach: iLUN=%u\n", iLUN));
+
+    AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
+                    ("The FDC device does not support hotplugging\n"),
+                    VERR_INVALID_PARAMETER);
+
+    /*
+     * Validate.
+     */
+    if (iLUN >= 2) {
+        AssertMsgFailed (("Configuration error: cannot attach or detach any but the first two LUNs - iLUN=%u\n",
+                          iLUN));
+        return VERR_PDM_DEVINS_NO_ATTACH;
+    }
+
+    /*
+     * Locate the drive and stuff.
+     */
+    drv = &fdctrl->drives[iLUN];
+
+    /* the usual paranoia */
+    AssertRelease (!drv->pDrvBase);
+    AssertRelease (!drv->pDrvBlock);
+    AssertRelease (!drv->pDrvBlockBios);
+    AssertRelease (!drv->pDrvMount);
+
+    rc = fdConfig (drv, pDevIns);
+    AssertMsg (rc != VERR_PDM_NO_ATTACHED_DRIVER,
+               ("Configuration error: failed to configure drive %d, rc=%Rrc\n", rc));
+    if (RT_SUCCESS(rc)) {
+        fd_revalidate (drv);
+    }
+
+    LogFlow (("floppyAttach: returns %Rrc\n", rc));
+    return rc;
+}
+
+
+/**
+ * Detach notification.
+ *
+ * The floppy drive has been temporarily 'unplugged'.
+ *
+ * @param   pDevIns     The device instance.
+ * @param   iLUN        The logical unit which is being detached.
+ */
+static DECLCALLBACK(void) fdcDetach (PPDMDEVINS pDevIns,
+                                     unsigned iLUN, uint32_t fFlags)
+{
+    fdctrl_t *fdctrl = PDMINS_2_DATA (pDevIns, fdctrl_t *);
+    LogFlow (("ideDetach: iLUN=%u\n", iLUN));
+
+    switch (iLUN) {
+    case 0:
+    case 1: {
+        fdrive_t *drv = &fdctrl->drives[iLUN];
+        drv->pDrvBase = NULL;
+        drv->pDrvBlock = NULL;
+        drv->pDrvBlockBios = NULL;
+        drv->pDrvMount = NULL;
+        break;
+    }
+
+    default:
+        AssertMsgFailed (("Cannot detach LUN#%d!\n", iLUN));
+        break;
+    }
+}
+
+
+/**
+ * Handle reset.
+ *
+ * I haven't check the specs on what's supposed to happen on reset, but we
+ * should get any 'FATAL: floppy recal:f07 ctrl not ready' when resetting
+ * at wrong time like we do if this was all void.
+ *
+ * @param   pDevIns     The device instance.
+ */
+static DECLCALLBACK(void) fdcReset (PPDMDEVINS pDevIns)
+{
+    fdctrl_t *fdctrl = PDMINS_2_DATA (pDevIns, fdctrl_t *);
+    unsigned i;
+    LogFlow (("fdcReset:\n"));
+
+    fdctrl_reset(fdctrl, 0);
+
+    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); i++) {
+        fd_revalidate(&fdctrl->drives[i]);
+    }
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVREG,pfnConstruct}
+ */
+static DECLCALLBACK(int) fdcConstruct (PPDMDEVINS pDevIns,
+                                       int iInstance,
+                                       PCFGMNODE pCfg)
+{
+    int            rc;
+    fdctrl_t       *fdctrl = PDMINS_2_DATA(pDevIns, fdctrl_t*);
+    unsigned       i, j;
+    int            ii;
+    bool           mem_mapped;
+    uint16_t       io_base;
+    uint8_t        irq_lvl, dma_chann;
+    PPDMIBASE      pBase;
+
+    Assert(iInstance == 0);
+    PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
+
+    /*
+     * Validate configuration.
+     */
+    if (!CFGMR3AreValuesValid(pCfg, "IRQ\0DMA\0MemMapped\0IOBase\0"))
+        return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
+
+    /*
+     * Read the configuration.
+     */
+    rc = CFGMR3QueryU8 (pCfg, "IRQ", &irq_lvl);
+    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
+        irq_lvl = 6;
+    else if (RT_FAILURE (rc)) {
+        AssertMsgFailed (("Configuration error: Failed to read U8 IRQ, rc=%Rrc\n", rc));
+        return rc;
+    }
+
+    rc = CFGMR3QueryU8 (pCfg, "DMA", &dma_chann);
+    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
+        dma_chann = 2;
+    else if (RT_FAILURE (rc)) {
+        AssertMsgFailed (("Configuration error: Failed to read U8 DMA, rc=%Rrc\n", rc));
+        return rc;
+    }
+
+    rc = CFGMR3QueryU16 (pCfg, "IOBase", &io_base);
+    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
+        io_base = 0x3f0;
+    else if (RT_FAILURE (rc)) {
+        AssertMsgFailed (("Configuration error: Failed to read U16 IOBase, rc=%Rrc\n", rc));
+        return rc;
+    }
+
+    rc = CFGMR3QueryBool (pCfg, "MemMapped", &mem_mapped);
+    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
+        mem_mapped = false;
+    else if (RT_FAILURE (rc)) {
+        AssertMsgFailed (("Configuration error: Failed to read bool value MemMapped rc=%Rrc\n", rc));
+        return rc;
+    }
+
+    /*
+     * Initialize data.
+     */
+    LogFlow(("fdcConstruct: irq_lvl=%d dma_chann=%d io_base=%#x\n", irq_lvl, dma_chann, io_base));
+    fdctrl->pDevIns   = pDevIns;
+    fdctrl->version   = 0x90;   /* Intel 82078 controller */
+    fdctrl->irq_lvl   = irq_lvl;
+    fdctrl->dma_chann = dma_chann;
+    fdctrl->io_base   = io_base;
+    fdctrl->config    = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
+    fdctrl->num_floppies = MAX_FD;
+
+    /* Fill 'command_to_handler' lookup table */
+    for (ii = RT_ELEMENTS(handlers) - 1; ii >= 0; ii--) {
+        for (j = 0; j < sizeof(command_to_handler); j++) {
+            if ((j & handlers[ii].mask) == handlers[ii].value) {
+                command_to_handler[j] = ii;
+            }
+        }
+    }
+
+    fdctrl->IBaseStatus.pfnQueryInterface = fdcStatusQueryInterface;
+    fdctrl->ILeds.pfnQueryStatusLed = fdcStatusQueryStatusLed;
+
+    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); ++i) {
+        fdrive_t *drv = &fdctrl->drives[i];
+
+        drv->drive = FDRIVE_DRV_NONE;
+        drv->iLUN = i;
+
+        drv->IBase.pfnQueryInterface = fdQueryInterface;
+        drv->IMountNotify.pfnMountNotify = fdMountNotify;
+        drv->IMountNotify.pfnUnmountNotify = fdUnmountNotify;
+        drv->Led.u32Magic = PDMLED_MAGIC;
+    }
+
+    /*
+     * Create the FDC timer.
+     */
+    rc = PDMDevHlpTMTimerCreate(pDevIns, TMCLOCK_VIRTUAL, fdc_timer, fdctrl,
+                                TMTIMER_FLAGS_DEFAULT_CRIT_SECT, "FDC Timer", &fdctrl->result_timer);
+    if (RT_FAILURE (rc))
+        return rc;
+
+    /*
+     * Register DMA channel.
+     */
+    if (fdctrl->dma_chann != 0xff) {
+        rc = PDMDevHlpDMARegister (pDevIns, dma_chann, &fdctrl_transfer_handler, fdctrl);
+        if (RT_FAILURE (rc))
+            return rc;
+    }
+
+    /*
+     * IO / MMIO.
+     */
+    if (mem_mapped) {
+        AssertMsgFailed (("Memory mapped floppy not support by now\n"));
+        return VERR_NOT_SUPPORTED;
+#if 0
+        FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
+        io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
+        cpu_register_physical_memory(base, 0x08, io_mem);
+#endif
+    } else {
+        rc = PDMDevHlpIOPortRegister (pDevIns, io_base + 0x1, 5, fdctrl,
+                                      fdc_io_write, fdc_io_read, NULL, NULL, "FDC#1");
+        if (RT_FAILURE (rc))
+            return rc;
+
+        rc = PDMDevHlpIOPortRegister (pDevIns, io_base + 0x7, 1, fdctrl,
+                                      fdc_io_write, fdc_io_read, NULL, NULL, "FDC#2");
+        if (RT_FAILURE (rc))
+            return rc;
+    }
+
+    /*
+     * Register the saved state data unit.
+     */
+    rc = PDMDevHlpSSMRegister (pDevIns, FDC_SAVESTATE_CURRENT, sizeof(*fdctrl), fdcSaveExec, fdcLoadExec);
+    if (RT_FAILURE(rc))
+        return rc;
+
+    /*
+     * Attach the status port (optional).
+     */
+    rc = PDMDevHlpDriverAttach (pDevIns, PDM_STATUS_LUN, &fdctrl->IBaseStatus, &pBase, "Status Port");
+    if (RT_SUCCESS (rc)) {
+        fdctrl->pLedsConnector = PDMIBASE_QUERY_INTERFACE(pBase, PDMILEDCONNECTORS);
+    } else if (rc != VERR_PDM_NO_ATTACHED_DRIVER) {
+        AssertMsgFailed (("Failed to attach to status driver. rc=%Rrc\n",
+                          rc));
+        return rc;
+    }
+
+    /*
+     * Initialize drives.
+     */
+    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); i++) {
+        fdrive_t *drv = &fdctrl->drives[i];
+        rc = fdConfig (drv, pDevIns);
+        if (    RT_FAILURE (rc)
+            &&  rc != VERR_PDM_NO_ATTACHED_DRIVER) {
+            AssertMsgFailed (("Configuration error: failed to configure drive %d, rc=%Rrc\n", rc));
+            return rc;
+        }
+    }
+
+    fdctrl_reset(fdctrl, 0);
+
+    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); i++)
+        fd_revalidate(&fdctrl->drives[i]);
+
+    return VINF_SUCCESS;
+}
+
+/**
+ * The device registration structure.
+ */
+const PDMDEVREG g_DeviceFloppyController =
+{
+    /* u32Version */
+    PDM_DEVREG_VERSION,
+    /* szName */
+    "i82078",
+    /* szRCMod */
+    "",
+    /* szR0Mod */
+    "",
+    /* pszDescription */
+    "Floppy drive controller (Intel 82078)",
+    /* fFlags */
+    PDM_DEVREG_FLAGS_DEFAULT_BITS,
+    /* fClass */
+    PDM_DEVREG_CLASS_STORAGE,
+    /* cMaxInstances */
+    1,
+    /* cbInstance */
+    sizeof(fdctrl_t),
+    /* pfnConstruct */
+    fdcConstruct,
+    /* pfnDestruct */
+    NULL,
+    /* pfnRelocate */
+    NULL,
+    /* pfnIOCtl */
+    NULL,
+    /* pfnPowerOn */
+    NULL,
+    /* pfnReset */
+    fdcReset,
+    /* pfnSuspend */
+    NULL,
+    /* pfnResume */
+    NULL,
+    /* pfnAttach */
+    fdcAttach,
+    /* pfnDetach */
+    fdcDetach,
+    /* pfnQueryInterface. */
+    NULL,
+    /* pfnInitComplete */
+    NULL,
+    /* pfnPowerOff */
+    NULL,
+    /* pfnSoftReset */
+    NULL,
+    /* u32VersionEnd */
+    PDM_DEVREG_VERSION
+};
+
+#endif /* VBOX */
+
+/*
+ * Local Variables:
+ *  mode: c
+ *  c-file-style: "k&r"
+ *  indent-tabs-mode: nil
+ * End:
+ */
+
Index: unk/src/VBox/Devices/Storage/fdc.c
===================================================================
--- /trunk/src/VBox/Devices/Storage/fdc.c	(revision 44806)
+++ 	(revision )
@@ -1,2781 +1,0 @@
-/* $Id$ */
-/** @file
- * VBox storage devices: Floppy disk controller
- */
-
-/*
- * Copyright (C) 2006-2011 Oracle Corporation
- *
- * This file is part of VirtualBox Open Source Edition (OSE), as
- * available from http://www.virtualbox.org. This file is free software;
- * you can redistribute it and/or modify it under the terms of the GNU
- * General Public License (GPL) as published by the Free Software
- * Foundation, in version 2 as it comes in the "COPYING" file of the
- * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
- * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
- * --------------------------------------------------------------------
- *
- * This code is based on:
- *
- * QEMU Floppy disk emulator (Intel 82078)
- *
- * Copyright (c) 2003 Jocelyn Mayer
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- */
-
-
-/*******************************************************************************
-*   Header Files                                                               *
-*******************************************************************************/
-#define LOG_GROUP LOG_GROUP_DEV_FDC
-#include <VBox/vmm/pdmdev.h>
-#include <iprt/assert.h>
-#include <iprt/string.h>
-#include <iprt/uuid.h>
-
-#include "VBoxDD.h"
-#include "vl_vbox.h"
-
-#define FDC_SAVESTATE_CURRENT   2       /* The new and improved saved state. */
-#define FDC_SAVESTATE_OLD       1       /* The original saved state. */
-
-#define MAX_FD 2
-
-#define PDMIBASE_2_FDRIVE(pInterface) \
-    ((fdrive_t *)((uintptr_t)(pInterface) - RT_OFFSETOF(fdrive_t, IBase)))
-
-#define PDMIMOUNTNOTIFY_2_FDRIVE(p)  \
-    ((fdrive_t *)((uintptr_t)(p) - RT_OFFSETOF(fdrive_t, IMountNotify)))
-
-
-/********************************************************/
-/* debug Floppy devices */
-/* #define DEBUG_FLOPPY */
-
-#ifndef VBOX
-    #ifdef DEBUG_FLOPPY
-    #define FLOPPY_DPRINTF(fmt, args...) \
-        do { printf("FLOPPY: " fmt , ##args); } while (0)
-    #endif
-#else /* !VBOX */
-    # ifdef LOG_ENABLED
-        static void FLOPPY_DPRINTF (const char *fmt, ...)
-        {
-            if (LogIsEnabled ()) {
-                va_list args;
-                va_start (args, fmt);
-                RTLogLogger (NULL, NULL, "floppy: %N", fmt, &args); /* %N - nested va_list * type formatting call. */
-                va_end (args);
-            }
-        }
-    # else
-      DECLINLINE(void) FLOPPY_DPRINTF(const char *pszFmt, ...) {}
-    # endif
-#endif /* !VBOX */
-
-#ifndef VBOX
-#define FLOPPY_ERROR(fmt, args...) \
-    do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
-#else /* VBOX */
-#   define FLOPPY_ERROR RTLogPrintf
-#endif /* VBOX */
-
-#ifdef VBOX
-typedef struct fdctrl_t fdctrl_t;
-#endif /* VBOX */
-
-/********************************************************/
-/* Floppy drive emulation                               */
-
-#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
-#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
-
-/* Will always be a fixed parameter for us */
-#define FD_SECTOR_LEN          512
-#define FD_SECTOR_SC           2   /* Sector size code */
-#define FD_RESET_SENSEI_COUNT  4   /* Number of sense interrupts on RESET */
-
-/* Floppy disk drive emulation */
-typedef enum fdisk_type_t {
-    FDRIVE_DISK_288   = 0x01, /* 2.88 MB disk           */
-    FDRIVE_DISK_144   = 0x02, /* 1.44 MB disk           */
-    FDRIVE_DISK_720   = 0x03, /* 720 kB disk            */
-    FDRIVE_DISK_USER  = 0x04, /* User defined geometry  */
-    FDRIVE_DISK_NONE  = 0x05  /* No disk                */
-} fdisk_type_t;
-
-typedef enum fdrive_type_t {
-    FDRIVE_DRV_144  = 0x00,   /* 1.44 MB 3"5 drive      */
-    FDRIVE_DRV_288  = 0x01,   /* 2.88 MB 3"5 drive      */
-    FDRIVE_DRV_120  = 0x02,   /* 1.2  MB 5"25 drive     */
-    FDRIVE_DRV_NONE = 0x03    /* No drive connected     */
-} fdrive_type_t;
-
-typedef enum fdrive_flags_t {
-    FDISK_DBL_SIDES  = 0x01
-} fdrive_flags_t;
-
-typedef enum fdrive_rate_t {
-    FDRIVE_RATE_500K = 0x00,  /* 500 Kbps               */
-    FDRIVE_RATE_300K = 0x01,  /* 300 Kbps               */
-    FDRIVE_RATE_250K = 0x02,  /* 250 Kbps               */
-    FDRIVE_RATE_1M   = 0x03   /* 1 Mbps                 */
-} fdrive_rate_t;
-
-/**
- * The status for one drive.
- *
- * @implements  PDMIBASE
- * @implements  PDMIBLOCKPORT
- * @implements  PDMIMOUNTNOTIFY
- */
-typedef struct fdrive_t {
-#ifndef VBOX
-    BlockDriverState *bs;
-#else /* VBOX */
-    /** Pointer to the attached driver's base interface. */
-    R3PTRTYPE(PPDMIBASE)            pDrvBase;
-    /** Pointer to the attached driver's block interface. */
-    R3PTRTYPE(PPDMIBLOCK)           pDrvBlock;
-    /** Pointer to the attached driver's block bios interface. */
-    R3PTRTYPE(PPDMIBLOCKBIOS)       pDrvBlockBios;
-    /** Pointer to the attached driver's mount interface.
-     * This is NULL if the driver isn't a removable unit. */
-    R3PTRTYPE(PPDMIMOUNT)           pDrvMount;
-    /** The base interface. */
-    PDMIBASE                        IBase;
-    /** The block port interface. */
-    PDMIBLOCKPORT                   IPort;
-    /** The mount notify interface. */
-    PDMIMOUNTNOTIFY                 IMountNotify;
-    /** The LUN #. */
-    RTUINT                          iLUN;
-    /** The LED for this LUN. */
-    PDMLED                          Led;
-#endif
-    /* Drive status */
-    fdrive_type_t drive;
-    uint8_t perpendicular;    /* 2.88 MB access mode    */
-    uint8_t dsk_chg;          /* Disk change line       */
-    /* Position */
-    uint8_t head;
-    uint8_t track;
-    uint8_t sect;
-    /* Media */
-    fdrive_flags_t flags;
-    uint8_t last_sect;        /* Nb sector per track    */
-    uint8_t max_track;        /* Nb of tracks           */
-    uint16_t bps;             /* Bytes per sector       */
-    uint8_t ro;               /* Is read-only           */
-    uint8_t media_rate;       /* Data rate of medium    */
-} fdrive_t;
-
-#define NUM_SIDES(drv)      (drv->flags & FDISK_DBL_SIDES ? 2 : 1)
-
-static void fd_init(fdrive_t *drv)
-{
-    /* Drive */
-    drv->drive = FDRIVE_DRV_NONE;
-    drv->perpendicular = 0;
-    /* Disk */
-    drv->last_sect = 0;
-    drv->max_track = 0;
-}
-
-static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
-                          uint8_t last_sect, uint8_t num_sides)
-{
-    return (((track * num_sides) + head) * last_sect) + sect - 1; /* sect >= 1 */
-}
-
-/* Returns current position, in sectors, for given drive */
-static int fd_sector(fdrive_t *drv)
-{
-    return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, NUM_SIDES(drv));
-}
-
-/* Seek to a new position:
- * returns 0 if already on right track
- * returns 1 if track changed
- * returns 2 if track is invalid
- * returns 3 if sector is invalid
- * returns 4 if seek is disabled
- */
-static int fd_seek(fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
-                   int enable_seek)
-{
-    int sector;
-    int ret;
-
-    if (track > drv->max_track ||
-        (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
-        FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
-                       head, track, sect, 1,
-                       (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
-                       drv->max_track, drv->last_sect);
-        return 2;
-    }
-    if (sect > drv->last_sect) {
-        FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
-                       head, track, sect, 1,
-                       (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
-                       drv->max_track, drv->last_sect);
-        return 3;
-    }
-    sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
-    ret = 0;
-    if (sector != fd_sector(drv)) {
-#if 0
-        if (!enable_seek) {
-            FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
-                         head, track, sect, 1, drv->max_track, drv->last_sect);
-            return 4;
-        }
-#endif
-        drv->head = head;
-        if (drv->track != track)
-            ret = 1;
-        drv->track = track;
-        drv->sect = sect;
-    }
-
-    return ret;
-}
-
-/* Set drive back to track 0 */
-static void fd_recalibrate(fdrive_t *drv)
-{
-    FLOPPY_DPRINTF("recalibrate\n");
-    drv->head = 0;
-    drv->track = 0;
-    drv->sect = 1;
-}
-
-/* Recognize floppy formats */
-typedef struct fd_format_t {
-    fdrive_type_t drive;
-    fdisk_type_t  disk;
-    uint8_t last_sect;
-    uint8_t max_track;
-    uint8_t max_head;
-    fdrive_rate_t rate;
-    const char *str;
-} fd_format_t;
-
-static fd_format_t fd_formats[] = {
-    /* First entry is default format */
-    /* 1.44 MB 3"1/2 floppy disks */
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K,  "1.6 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB 3\"1/2", },
-    /* 2.88 MB 3"1/2 floppy disks */
-    { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M,   "2.88 MB 3\"1/2", },
-    { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M,   "3.12 MB 3\"1/2", },
-    { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M,    "3.2 MB 3\"1/2", },
-    { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M,   "3.52 MB 3\"1/2", },
-    { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M,   "3.84 MB 3\"1/2", },
-    /* 720 kB 3"1/2 floppy disks */
-    { FDRIVE_DRV_144, FDRIVE_DISK_720,  9, 80, 1, FDRIVE_RATE_250K,  "720 kB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K,  "800 kB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K,  "820 kB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K,  "830 kB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB 3\"1/2", },
-    { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB 3\"1/2", },
-    /* 1.2 MB 5"1/4 floppy disks */
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, FDRIVE_RATE_500K,  "1.2 MB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, FDRIVE_RATE_500K, "1.48 MB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, FDRIVE_RATE_500K, "1.49 MB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, FDRIVE_RATE_500K,  "1.6 MB 5\"1/4", },
-    /* 720 kB 5"1/4 floppy disks */
-    { FDRIVE_DRV_120, FDRIVE_DISK_288,  9, 80, 1, FDRIVE_RATE_250K,  "720 kB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, FDRIVE_RATE_250K,  "880 kB 5\"1/4", },
-    /* 360 kB 5"1/4 floppy disks */
-    { FDRIVE_DRV_120, FDRIVE_DISK_288,  9, 40, 1, FDRIVE_RATE_300K,  "360 kB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288,  9, 40, 0, FDRIVE_RATE_300K,  "180 kB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, FDRIVE_RATE_300K,  "410 kB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, FDRIVE_RATE_300K,  "420 kB 5\"1/4", },
-    /* 320 kB 5"1/4 floppy disks */
-    { FDRIVE_DRV_120, FDRIVE_DISK_288,  8, 40, 1, FDRIVE_RATE_250K,  "320 kB 5\"1/4", },
-    { FDRIVE_DRV_120, FDRIVE_DISK_288,  8, 40, 0, FDRIVE_RATE_250K,  "160 kB 5\"1/4", },
-    /* 360 kB must match 5"1/4 better than 3"1/2... */
-    { FDRIVE_DRV_144, FDRIVE_DISK_720,  9, 80, 0, FDRIVE_RATE_250K,  "360 kB 3\"1/2", },
-    /* end */
-    { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, 0, NULL, },
-};
-
-/* Revalidate a disk drive after a disk change */
-static void fd_revalidate(fdrive_t *drv)
-{
-    const fd_format_t *parse;
-    uint64_t nb_sectors, size;
-    int i, first_match, match;
-    int nb_heads, max_track, last_sect, ro;
-
-    FLOPPY_DPRINTF("revalidate\n");
-#ifndef VBOX
-    if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
-        ro = bdrv_is_read_only(drv->bs);
-        bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
-#else /* VBOX */
-    if (drv->pDrvBlock
-        && drv->pDrvMount
-        && drv->pDrvMount->pfnIsMounted (drv->pDrvMount)) {
-        ro = drv->pDrvBlock->pfnIsReadOnly (drv->pDrvBlock);
-        nb_heads = max_track = last_sect = 0;
-#endif /* VBOX */
-        if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
-            FLOPPY_DPRINTF("User defined disk (%d %d %d)",
-                           nb_heads - 1, max_track, last_sect);
-        } else {
-#ifndef VBOX
-            bdrv_get_geometry(drv->bs, &nb_sectors);
-#else /* VBOX */
-            {
-                uint64_t size2 = drv->pDrvBlock->pfnGetSize (drv->pDrvBlock);
-                nb_sectors = size2 / FD_SECTOR_LEN;
-            }
-#endif /* VBOX */
-            match = -1;
-            first_match = -1;
-            for (i = 0;; i++) {
-                parse = &fd_formats[i];
-                if (parse->drive == FDRIVE_DRV_NONE)
-                    break;
-                if (drv->drive == parse->drive ||
-                    drv->drive == FDRIVE_DRV_NONE) {
-                    size = (parse->max_head + 1) * parse->max_track *
-                        parse->last_sect;
-                    if (nb_sectors == size) {
-                        match = i;
-                        break;
-                    }
-                    if (first_match == -1)
-                        first_match = i;
-                }
-            }
-            if (match == -1) {
-                if (first_match == -1)
-                    match = 1;
-                else
-                    match = first_match;
-                parse = &fd_formats[match];
-            }
-            nb_heads = parse->max_head + 1;
-            max_track = parse->max_track;
-            last_sect = parse->last_sect;
-            drv->drive = parse->drive;
-#ifdef VBOX
-            drv->media_rate = parse->rate;
-#endif
-            FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
-                           nb_heads, max_track, last_sect, ro ? "ro" : "rw");
-            LogRel(("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
-                    nb_heads, max_track, last_sect, ro ? "ro" : "rw"));
-        }
-        if (nb_heads == 1) {
-            drv->flags &= ~FDISK_DBL_SIDES;
-        } else {
-            drv->flags |= FDISK_DBL_SIDES;
-        }
-        drv->max_track = max_track;
-        drv->last_sect = last_sect;
-        drv->ro = ro;
-    } else {
-        FLOPPY_DPRINTF("No disk in drive\n");
-        drv->last_sect = 0;
-        drv->max_track = 0;
-        drv->flags &= ~FDISK_DBL_SIDES;
-        drv->dsk_chg = true;    /* Disk change line active. */
-    }
-}
-
-/********************************************************/
-/* Intel 82078 floppy disk controller emulation          */
-
-static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq);
-static void fdctrl_reset_fifo(fdctrl_t *fdctrl);
-#ifndef VBOX
-static int fdctrl_transfer_handler (void *opaque, int nchan,
-                                    int dma_pos, int dma_len);
-#else /* VBOX: */
-static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
-                                                       void *opaque,
-                                                       unsigned nchan,
-                                                       uint32_t dma_pos,
-                                                       uint32_t dma_len);
-#endif /* VBOX */
-static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0);
-static fdrive_t *get_cur_drv(fdctrl_t *fdctrl);
-
-static void fdctrl_result_timer(void *opaque);
-static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl);
-static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl);
-static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl);
-static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl);
-static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl);
-static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_data(fdctrl_t *fdctrl);
-static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value);
-static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl);
-static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value);
-
-enum {
-    FD_DIR_WRITE   = 0,
-    FD_DIR_READ    = 1,
-    FD_DIR_SCANE   = 2,
-    FD_DIR_SCANL   = 3,
-    FD_DIR_SCANH   = 4
-};
-
-enum {
-    FD_STATE_MULTI  = 0x01,     /* multi track flag */
-    FD_STATE_FORMAT = 0x02,     /* format flag */
-    FD_STATE_SEEK   = 0x04      /* seek flag */
-};
-
-enum {
-    FD_REG_SRA = 0x00,
-    FD_REG_SRB = 0x01,
-    FD_REG_DOR = 0x02,
-    FD_REG_TDR = 0x03,
-    FD_REG_MSR = 0x04,
-    FD_REG_DSR = 0x04,
-    FD_REG_FIFO = 0x05,
-    FD_REG_DIR = 0x07,
-    FD_REG_CCR = 0x07
-};
-
-enum {
-    FD_CMD_READ_TRACK = 0x02,
-    FD_CMD_SPECIFY = 0x03,
-    FD_CMD_SENSE_DRIVE_STATUS = 0x04,
-    FD_CMD_WRITE = 0x05,
-    FD_CMD_READ = 0x06,
-    FD_CMD_RECALIBRATE = 0x07,
-    FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
-    FD_CMD_WRITE_DELETED = 0x09,
-    FD_CMD_READ_ID = 0x0a,
-    FD_CMD_READ_DELETED = 0x0c,
-    FD_CMD_FORMAT_TRACK = 0x0d,
-    FD_CMD_DUMPREG = 0x0e,
-    FD_CMD_SEEK = 0x0f,
-    FD_CMD_VERSION = 0x10,
-    FD_CMD_SCAN_EQUAL = 0x11,
-    FD_CMD_PERPENDICULAR_MODE = 0x12,
-    FD_CMD_CONFIGURE = 0x13,
-    FD_CMD_LOCK = 0x14,
-    FD_CMD_VERIFY = 0x16,
-    FD_CMD_POWERDOWN_MODE = 0x17,
-    FD_CMD_PART_ID = 0x18,
-    FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
-    FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
-    FD_CMD_SAVE = 0x2e,
-    FD_CMD_OPTION = 0x33,
-    FD_CMD_RESTORE = 0x4e,
-    FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
-    FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
-    FD_CMD_FORMAT_AND_WRITE = 0xcd,
-    FD_CMD_RELATIVE_SEEK_IN = 0xcf
-};
-
-enum {
-    FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
-    FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
-    FD_CONFIG_POLL  = 0x10, /* Poll enabled */
-    FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
-    FD_CONFIG_EIS   = 0x40  /* No implied seeks */
-};
-
-enum {
-    FD_SR0_EQPMT    = 0x10,
-    FD_SR0_SEEK     = 0x20,
-    FD_SR0_ABNTERM  = 0x40,
-    FD_SR0_INVCMD   = 0x80,
-    FD_SR0_RDYCHG   = 0xc0
-};
-
-enum {
-    FD_SR1_MA       = 0x01, /* Missing address mark */
-    FD_SR1_NW       = 0x02, /* Not writable */
-    FD_SR1_EC       = 0x80  /* End of cylinder */
-};
-
-enum {
-    FD_SR2_SNS      = 0x04, /* Scan not satisfied */
-    FD_SR2_SEH      = 0x08  /* Scan equal hit */
-};
-
-enum {
-    FD_SRA_DIR      = 0x01,
-    FD_SRA_nWP      = 0x02,
-    FD_SRA_nINDX    = 0x04,
-    FD_SRA_HDSEL    = 0x08,
-    FD_SRA_nTRK0    = 0x10,
-    FD_SRA_STEP     = 0x20,
-    FD_SRA_nDRV2    = 0x40,
-    FD_SRA_INTPEND  = 0x80
-};
-
-enum {
-    FD_SRB_MTR0     = 0x01,
-    FD_SRB_MTR1     = 0x02,
-    FD_SRB_WGATE    = 0x04,
-    FD_SRB_RDATA    = 0x08,
-    FD_SRB_WDATA    = 0x10,
-    FD_SRB_DR0      = 0x20
-};
-
-enum {
-#if MAX_FD == 4
-    FD_DOR_SELMASK  = 0x03,
-#else
-    FD_DOR_SELMASK  = 0x01,
-#endif
-    FD_DOR_nRESET   = 0x04,
-    FD_DOR_DMAEN    = 0x08,
-    FD_DOR_MOTEN0   = 0x10,
-    FD_DOR_MOTEN1   = 0x20,
-    FD_DOR_MOTEN2   = 0x40,
-    FD_DOR_MOTEN3   = 0x80
-};
-
-enum {
-#if MAX_FD == 4
-    FD_TDR_BOOTSEL  = 0x0c
-#else
-    FD_TDR_BOOTSEL  = 0x04
-#endif
-};
-
-enum {
-    FD_DSR_DRATEMASK= 0x03,
-    FD_DSR_PWRDOWN  = 0x40,
-    FD_DSR_SWRESET  = 0x80
-};
-
-enum {
-    FD_MSR_DRV0BUSY = 0x01,
-    FD_MSR_DRV1BUSY = 0x02,
-    FD_MSR_DRV2BUSY = 0x04,
-    FD_MSR_DRV3BUSY = 0x08,
-    FD_MSR_CMDBUSY  = 0x10,
-    FD_MSR_NONDMA   = 0x20,
-    FD_MSR_DIO      = 0x40,
-    FD_MSR_RQM      = 0x80
-};
-
-enum {
-    FD_DIR_DSKCHG   = 0x80
-};
-
-#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
-#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
-#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
-
-#ifdef VBOX
-/**
- * Floppy controller state.
- *
- * @implements  PDMILEDPORTS
- */
-#endif
-struct fdctrl_t {
-#ifndef VBOX
-    fdctrl_t *fdctrl;
-#endif
-    /* Controller's identification */
-    uint8_t version;
-    /* HW */
-#ifndef VBOX
-    int irq;
-    int dma_chann;
-#else
-    uint8_t irq_lvl;
-    uint8_t dma_chann;
-#endif
-    uint32_t io_base;
-    /* Controller state */
-    QEMUTimer *result_timer;
-    uint8_t sra;
-    uint8_t srb;
-    uint8_t dor;
-    uint8_t tdr;
-    uint8_t dsr;
-    uint8_t msr;
-    uint8_t cur_drv;
-    uint8_t status0;
-    uint8_t status1;
-    uint8_t status2;
-    /* Command FIFO */
-    uint8_t fifo[FD_SECTOR_LEN];
-    uint32_t data_pos;
-    uint32_t data_len;
-    uint8_t data_state;
-    uint8_t data_dir;
-    uint8_t eot; /* last wanted sector */
-    /* States kept only to be returned back */
-    /* Timers state */
-    uint8_t timer0;
-    uint8_t timer1;
-    /* precompensation */
-    uint8_t precomp_trk;
-    uint8_t config;
-    uint8_t lock;
-    /* Power down config (also with status regB access mode */
-    uint8_t pwrd;
-    /* Floppy drives */
-    uint8_t num_floppies;
-    fdrive_t drives[MAX_FD];
-    uint8_t reset_sensei;
-#ifdef VBOX
-    /** Pointer to device instance. */
-    PPDMDEVINS pDevIns;
-
-    /** Status LUN: The base interface. */
-    PDMIBASE IBaseStatus;
-    /** Status LUN: The Leds interface. */
-    PDMILEDPORTS ILeds;
-    /** Status LUN: The Partner of ILeds. */
-    PPDMILEDCONNECTORS pLedsConnector;
-#endif
-};
-
-static uint32_t fdctrl_read (void *opaque, uint32_t reg)
-{
-    fdctrl_t *fdctrl = opaque;
-    uint32_t retval;
-
-    switch (reg) {
-    case FD_REG_SRA:
-        retval = fdctrl_read_statusA(fdctrl);
-        break;
-    case FD_REG_SRB:
-        retval = fdctrl_read_statusB(fdctrl);
-        break;
-    case FD_REG_DOR:
-        retval = fdctrl_read_dor(fdctrl);
-        break;
-    case FD_REG_TDR:
-        retval = fdctrl_read_tape(fdctrl);
-        break;
-    case FD_REG_MSR:
-        retval = fdctrl_read_main_status(fdctrl);
-        break;
-    case FD_REG_FIFO:
-        retval = fdctrl_read_data(fdctrl);
-        break;
-    case FD_REG_DIR:
-        retval = fdctrl_read_dir(fdctrl);
-        break;
-    default:
-        retval = (uint32_t)(-1);
-        break;
-    }
-    FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
-
-    return retval;
-}
-
-static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
-{
-    fdctrl_t *fdctrl = opaque;
-
-    FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
-
-    switch (reg) {
-    case FD_REG_DOR:
-        fdctrl_write_dor(fdctrl, value);
-        break;
-    case FD_REG_TDR:
-        fdctrl_write_tape(fdctrl, value);
-        break;
-    case FD_REG_DSR:
-        fdctrl_write_rate(fdctrl, value);
-        break;
-    case FD_REG_FIFO:
-        fdctrl_write_data(fdctrl, value);
-        break;
-    case FD_REG_CCR:
-        fdctrl_write_ccr(fdctrl, value);
-        break;
-    default:
-        break;
-    }
-}
-
-#ifdef VBOX
-/**
- * Called when a medium is mounted.
- *
- * @param   pInterface      Pointer to the interface structure
- *                          containing the called function pointer.
- */
-static DECLCALLBACK(void) fdMountNotify(PPDMIMOUNTNOTIFY pInterface)
-{
-    fdrive_t *drv = PDMIMOUNTNOTIFY_2_FDRIVE (pInterface);
-    LogFlow(("fdMountNotify:\n"));
-    fd_revalidate(drv);
-}
-
-/**
- * Called when a medium is unmounted.
- * @param   pInterface      Pointer to the interface structure
- *                          containing the called function pointer.
- */
-static DECLCALLBACK(void) fdUnmountNotify(PPDMIMOUNTNOTIFY pInterface)
-{
-    fdrive_t *drv = PDMIMOUNTNOTIFY_2_FDRIVE (pInterface);
-    LogFlow(("fdUnmountNotify:\n"));
-    fd_revalidate(drv);
-}
-#endif
-
-/* Change IRQ state */
-static void fdctrl_reset_irq(fdctrl_t *fdctrl)
-{
-    if (!(fdctrl->sra & FD_SRA_INTPEND))
-        return;
-    FLOPPY_DPRINTF("Reset interrupt\n");
-#ifdef VBOX
-    PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 0);
-#else
-    qemu_set_irq(fdctrl->irq, 0);
-#endif
-    fdctrl->sra &= ~FD_SRA_INTPEND;
-}
-
-static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0)
-{
-    if (!(fdctrl->sra & FD_SRA_INTPEND)) {
-#ifdef VBOX
-        PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 1);
-#else
-        qemu_set_irq(fdctrl->irq, 1);
-#endif
-        fdctrl->sra |= FD_SRA_INTPEND;
-    }
-    if (status0 & FD_SR0_SEEK) {
-        fdrive_t    *cur_drv;
-
-        /* A seek clears the disk change line (if a disk is inserted). */
-        cur_drv = get_cur_drv(fdctrl);
-        if (cur_drv->max_track)
-            cur_drv->dsk_chg = false;
-    }
-
-    fdctrl->reset_sensei = 0;
-    fdctrl->status0 = status0;
-    FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
-}
-
-/* Reset controller */
-static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq)
-{
-    int i;
-
-    FLOPPY_DPRINTF("reset controller\n");
-    fdctrl_reset_irq(fdctrl);
-    /* Initialise controller */
-    fdctrl->sra = 0;
-    fdctrl->srb = 0xc0;
-#ifdef VBOX
-    if (!fdctrl->drives[1].pDrvBlock)
-#else
-    if (!fdctrl->drives[1].bs)
-#endif
-        fdctrl->sra |= FD_SRA_nDRV2;
-    fdctrl->cur_drv = 0;
-    fdctrl->dor = FD_DOR_nRESET;
-    fdctrl->dor |= (fdctrl->dma_chann != 0xff) ? FD_DOR_DMAEN : 0;
-    fdctrl->msr = FD_MSR_RQM;
-    /* FIFO state */
-    fdctrl->data_pos = 0;
-    fdctrl->data_len = 0;
-    fdctrl->data_state = 0;
-    fdctrl->data_dir = FD_DIR_WRITE;
-    for (i = 0; i < MAX_FD; i++)
-        fd_recalibrate(&fdctrl->drives[i]);
-    fdctrl_reset_fifo(fdctrl);
-    if (do_irq) {
-        fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
-        fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
-    }
-}
-
-static inline fdrive_t *drv0(fdctrl_t *fdctrl)
-{
-    return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
-}
-
-static inline fdrive_t *drv1(fdctrl_t *fdctrl)
-{
-    if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
-        return &fdctrl->drives[1];
-    else
-        return &fdctrl->drives[0];
-}
-
-#if MAX_FD == 4
-static inline fdrive_t *drv2(fdctrl_t *fdctrl)
-{
-    if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
-        return &fdctrl->drives[2];
-    else
-        return &fdctrl->drives[1];
-}
-
-static inline fdrive_t *drv3(fdctrl_t *fdctrl)
-{
-    if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
-        return &fdctrl->drives[3];
-    else
-        return &fdctrl->drives[2];
-}
-#endif
-
-static fdrive_t *get_cur_drv(fdctrl_t *fdctrl)
-{
-    switch (fdctrl->cur_drv) {
-        case 0: return drv0(fdctrl);
-        case 1: return drv1(fdctrl);
-#if MAX_FD == 4
-        case 2: return drv2(fdctrl);
-        case 3: return drv3(fdctrl);
-#endif
-        default: return NULL;
-    }
-}
-
-/* Status A register : 0x00 (read-only) */
-static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl)
-{
-    uint32_t retval = fdctrl->sra;
-
-    FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
-
-    return retval;
-}
-
-/* Status B register : 0x01 (read-only) */
-static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl)
-{
-    uint32_t retval = fdctrl->srb;
-
-    FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
-
-    return retval;
-}
-
-/* Digital output register : 0x02 */
-static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl)
-{
-    uint32_t retval = fdctrl->dor;
-
-    /* Selected drive */
-    retval |= fdctrl->cur_drv;
-    FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
-
-    return retval;
-}
-
-static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value)
-{
-    FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
-
-    /* Motors */
-    if (value & FD_DOR_MOTEN0)
-        fdctrl->srb |= FD_SRB_MTR0;
-    else
-        fdctrl->srb &= ~FD_SRB_MTR0;
-    if (value & FD_DOR_MOTEN1)
-        fdctrl->srb |= FD_SRB_MTR1;
-    else
-        fdctrl->srb &= ~FD_SRB_MTR1;
-
-    /* Drive */
-    if (value & 1)
-        fdctrl->srb |= FD_SRB_DR0;
-    else
-        fdctrl->srb &= ~FD_SRB_DR0;
-
-    /* Reset */
-    if (!(value & FD_DOR_nRESET)) {
-        if (fdctrl->dor & FD_DOR_nRESET) {
-            FLOPPY_DPRINTF("controller enter RESET state\n");
-        }
-    } else {
-        if (!(fdctrl->dor & FD_DOR_nRESET)) {
-            FLOPPY_DPRINTF("controller out of RESET state\n");
-            fdctrl_reset(fdctrl, 1);
-            fdctrl->dsr &= ~FD_DSR_PWRDOWN;
-        }
-    }
-    /* Selected drive */
-    fdctrl->cur_drv = value & FD_DOR_SELMASK;
-
-    fdctrl->dor = value;
-}
-
-/* Tape drive register : 0x03 */
-static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl)
-{
-    uint32_t retval = fdctrl->tdr;
-
-    FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
-
-    return retval;
-}
-
-static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value)
-{
-    /* Reset mode */
-    if (!(fdctrl->dor & FD_DOR_nRESET)) {
-        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
-        return;
-    }
-    FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
-    /* Disk boot selection indicator */
-    fdctrl->tdr = value & FD_TDR_BOOTSEL;
-    /* Tape indicators: never allow */
-}
-
-/* Main status register : 0x04 (read) */
-static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl)
-{
-    uint32_t retval = fdctrl->msr;
-
-    fdctrl->dsr &= ~FD_DSR_PWRDOWN;
-    fdctrl->dor |= FD_DOR_nRESET;
-
-    FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
-
-    return retval;
-}
-
-/* Data select rate register : 0x04 (write) */
-static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value)
-{
-    /* Reset mode */
-    if (!(fdctrl->dor & FD_DOR_nRESET)) {
-        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
-        return;
-    }
-    FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
-    /* Reset: autoclear */
-    if (value & FD_DSR_SWRESET) {
-        fdctrl->dor &= ~FD_DOR_nRESET;
-        fdctrl_reset(fdctrl, 1);
-        fdctrl->dor |= FD_DOR_nRESET;
-    }
-    if (value & FD_DSR_PWRDOWN) {
-        fdctrl_reset(fdctrl, 1);
-    }
-    fdctrl->dsr = value;
-}
-
-/* Configuration control register : 0x07 (write) */
-static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value)
-{
-    /* Reset mode */
-    if (!(fdctrl->dor & FD_DOR_nRESET)) {
-        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
-        return;
-    }
-    FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
-
-    /* Only the rate selection bits used in AT mode, and we
-     * store those in the DSR.
-     */
-    fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) | (value & FD_DSR_DRATEMASK);
-}
-
-static int fdctrl_media_changed(fdrive_t *drv)
-{
-#ifdef VBOX
-    return drv->dsk_chg;
-#else
-    int ret;
-
-    if (!drv->bs)
-        return 0;
-    ret = bdrv_media_changed(drv->bs);
-    if (ret) {
-        fd_revalidate(drv);
-    }
-    return ret;
-#endif
-}
-
-/* Digital input register : 0x07 (read-only) */
-static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl)
-{
-    uint32_t retval = 0;
-
-#ifdef VBOX
-    if (fdctrl_media_changed(get_cur_drv(fdctrl)))
-#else
-    if (fdctrl_media_changed(drv0(fdctrl))
-     || fdctrl_media_changed(drv1(fdctrl))
-#if MAX_FD == 4
-     || fdctrl_media_changed(drv2(fdctrl))
-     || fdctrl_media_changed(drv3(fdctrl))
-#endif
-        )
-#endif
-        retval |= FD_DIR_DSKCHG;
-    if (retval != 0)
-        FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
-
-    return retval;
-}
-
-/* FIFO state control */
-static void fdctrl_reset_fifo(fdctrl_t *fdctrl)
-{
-    fdctrl->data_dir = FD_DIR_WRITE;
-    fdctrl->data_pos = 0;
-    fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO);
-}
-
-/* Set FIFO status for the host to read */
-static void fdctrl_set_fifo(fdctrl_t *fdctrl, int fifo_len, int do_irq)
-{
-    fdctrl->data_dir = FD_DIR_READ;
-    fdctrl->data_len = fifo_len;
-    fdctrl->data_pos = 0;
-    fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO;
-    if (do_irq)
-        fdctrl_raise_irq(fdctrl, 0x00);
-}
-
-/* Set an error: unimplemented/unknown command */
-static void fdctrl_unimplemented(fdctrl_t *fdctrl, int direction)
-{
-    FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
-    fdctrl->fifo[0] = FD_SR0_INVCMD;
-    fdctrl_set_fifo(fdctrl, 1, 0);
-}
-
-/* Seek to next sector */
-static int fdctrl_seek_to_next_sect(fdctrl_t *fdctrl, fdrive_t *cur_drv)
-{
-    FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
-                   cur_drv->head, cur_drv->track, cur_drv->sect,
-                   fd_sector(cur_drv));
-    /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
-       error in fact */
-    if (cur_drv->sect >= cur_drv->last_sect ||
-        cur_drv->sect == fdctrl->eot) {
-        cur_drv->sect = 1;
-        if (FD_MULTI_TRACK(fdctrl->data_state)) {
-            if (cur_drv->head == 0 &&
-                (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
-                cur_drv->head = 1;
-            } else {
-                cur_drv->head = 0;
-                cur_drv->track++;
-                if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
-                    return 0;
-            }
-        } else {
-            cur_drv->track++;
-            return 0;
-        }
-        FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
-                       cur_drv->head, cur_drv->track,
-                       cur_drv->sect, fd_sector(cur_drv));
-    } else {
-        cur_drv->sect++;
-    }
-    return 1;
-}
-
-/* Callback for transfer end (stop or abort) */
-static void fdctrl_stop_transfer(fdctrl_t *fdctrl, uint8_t status0,
-                                 uint8_t status1, uint8_t status2)
-{
-    fdrive_t *cur_drv;
-
-    cur_drv = get_cur_drv(fdctrl);
-    FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
-                   status0, status1, status2,
-                   status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl));
-    fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
-    fdctrl->fifo[1] = status1;
-    fdctrl->fifo[2] = status2;
-    fdctrl->fifo[3] = cur_drv->track;
-    fdctrl->fifo[4] = cur_drv->head;
-    fdctrl->fifo[5] = cur_drv->sect;
-    fdctrl->fifo[6] = FD_SECTOR_SC;
-    fdctrl->data_dir = FD_DIR_READ;
-    if (!(fdctrl->msr & FD_MSR_NONDMA)) {
-#ifdef VBOX
-        PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 0);
-#else
-        DMA_release_DREQ(fdctrl->dma_chann);
-#endif
-    }
-    fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
-    fdctrl->msr &= ~FD_MSR_NONDMA;
-    fdctrl_set_fifo(fdctrl, 7, 1);
-}
-
-/* Prepare a data transfer (either DMA or FIFO) */
-static void fdctrl_start_transfer(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-    uint8_t kh, kt, ks;
-    int did_seek = 0;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    kt = fdctrl->fifo[2];
-    kh = fdctrl->fifo[3];
-    ks = fdctrl->fifo[4];
-    FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
-                   GET_CUR_DRV(fdctrl), kh, kt, ks,
-                   fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
-    switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
-    case 2:
-        /* sect too big */
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    case 3:
-        /* track too big */
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    case 4:
-        /* No seek enabled */
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    case 1:
-        did_seek = 1;
-        break;
-    default:
-        break;
-    }
-    /* Check the data rate. If the programmed data rate does not match
-     * the currently inserted medium, the operation has to fail.
-     */
-#ifdef VBOX
-    if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
-        FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
-                       fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    }
-#endif
-    /* Set the FIFO state */
-    fdctrl->data_dir = direction;
-    fdctrl->data_pos = 0;
-    fdctrl->msr |= FD_MSR_CMDBUSY;
-    if (fdctrl->fifo[0] & 0x80)
-        fdctrl->data_state |= FD_STATE_MULTI;
-    else
-        fdctrl->data_state &= ~FD_STATE_MULTI;
-    if (did_seek)
-        fdctrl->data_state |= FD_STATE_SEEK;
-    else
-        fdctrl->data_state &= ~FD_STATE_SEEK;
-    if (fdctrl->fifo[5] == 00) {
-        fdctrl->data_len = fdctrl->fifo[8];
-    } else {
-        int tmp;
-        fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
-        tmp = (fdctrl->fifo[6] - ks + 1);
-        if (fdctrl->fifo[0] & 0x80)
-            tmp += fdctrl->fifo[6];
-        fdctrl->data_len *= tmp;
-    }
-    fdctrl->eot = fdctrl->fifo[6];
-    if (fdctrl->dor & FD_DOR_DMAEN) {
-        int dma_mode;
-        /* DMA transfer are enabled. Check if DMA channel is well programmed */
-#ifndef VBOX
-        dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
-#else
-        dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
-#endif
-        dma_mode = (dma_mode >> 2) & 3;
-        FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
-                       dma_mode, direction,
-                       (128 << fdctrl->fifo[5]) *
-                       (cur_drv->last_sect - ks + 1), fdctrl->data_len);
-        if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
-              direction == FD_DIR_SCANH) && dma_mode == 0) ||
-            (direction == FD_DIR_WRITE && dma_mode == 2) ||
-            (direction == FD_DIR_READ && dma_mode == 1)) {
-            /* No access is allowed until DMA transfer has completed */
-            fdctrl->msr &= ~FD_MSR_RQM;
-            /* Now, we just have to wait for the DMA controller to
-             * recall us...
-             */
-#ifndef VBOX
-            DMA_hold_DREQ(fdctrl->dma_chann);
-            DMA_schedule(fdctrl->dma_chann);
-#else
-            PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
-            PDMDevHlpDMASchedule (fdctrl->pDevIns);
-#endif
-            return;
-        } else {
-            FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
-        }
-    }
-    FLOPPY_DPRINTF("start non-DMA transfer\n");
-    fdctrl->msr |= FD_MSR_NONDMA;
-    if (direction != FD_DIR_WRITE)
-        fdctrl->msr |= FD_MSR_DIO;
-    /* IO based transfer: calculate len */
-    fdctrl_raise_irq(fdctrl, 0x00);
-
-    return;
-}
-
-/* Prepare a transfer of deleted data */
-static void fdctrl_start_transfer_del(fdctrl_t *fdctrl, int direction)
-{
-    FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
-
-    /* We don't handle deleted data,
-     * so we don't return *ANYTHING*
-     */
-    fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
-}
-
-#ifdef VBOX
-/* Block driver read/write wrappers. */
-
-static int blk_write(fdrive_t *drv, int64_t sector_num, const uint8_t *buf, int nb_sectors)
-{
-    int     rc;
-
-    drv->Led.Asserted.s.fWriting = drv->Led.Actual.s.fWriting = 1;
-
-    rc = drv->pDrvBlock->pfnWrite(drv->pDrvBlock, sector_num * FD_SECTOR_LEN,
-                                  buf, nb_sectors * FD_SECTOR_LEN);
-
-    drv->Led.Actual.s.fWriting = 0;
-    if (RT_FAILURE(rc))
-        AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
-
-    return rc;
-}
-
-static int blk_read(fdrive_t *drv, int64_t sector_num, uint8_t *buf, int nb_sectors)
-{
-    int     rc;
-
-    drv->Led.Asserted.s.fReading = drv->Led.Actual.s.fReading = 1;
-
-    rc = drv->pDrvBlock->pfnRead(drv->pDrvBlock, sector_num * FD_SECTOR_LEN,
-                                 buf, nb_sectors * FD_SECTOR_LEN);
-
-    drv->Led.Actual.s.fReading = 0;
-
-    if (RT_FAILURE(rc))
-        AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
-
-    return rc;
-}
-
-#endif
-
-/* handlers for DMA transfers */
-#ifdef VBOX
-static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
-                                                       void *opaque,
-                                                       unsigned nchan,
-                                                       uint32_t dma_pos,
-                                                       uint32_t dma_len)
-#else
-static int fdctrl_transfer_handler (void *opaque, int nchan,
-                                    int dma_pos, int dma_len)
-#endif
-{
-    fdctrl_t *fdctrl;
-    fdrive_t *cur_drv;
-#ifdef VBOX
-    int rc;
-    uint32_t len, start_pos, rel_pos;
-#else
-    int len, start_pos, rel_pos;
-#endif
-    uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
-
-    fdctrl = opaque;
-    if (fdctrl->msr & FD_MSR_RQM) {
-        FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
-        return 0;
-    }
-    cur_drv = get_cur_drv(fdctrl);
-    if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
-        fdctrl->data_dir == FD_DIR_SCANH)
-        status2 = FD_SR2_SNS;
-    if (dma_len > fdctrl->data_len)
-        dma_len = fdctrl->data_len;
-#ifndef VBOX
-    if (cur_drv->bs == NULL)
-#else  /* !VBOX */
-    if (cur_drv->pDrvBlock == NULL)
-#endif
-    {
-        if (fdctrl->data_dir == FD_DIR_WRITE)
-            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
-        else
-            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
-        len = 0;
-        goto transfer_error;
-    }
-    rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
-    for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
-        len = dma_len - fdctrl->data_pos;
-        if (len + rel_pos > FD_SECTOR_LEN)
-            len = FD_SECTOR_LEN - rel_pos;
-        FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
-                       "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
-                       fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
-                       cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
-                       fd_sector(cur_drv) * FD_SECTOR_LEN);
-        if (fdctrl->data_dir != FD_DIR_WRITE ||
-            len < FD_SECTOR_LEN || rel_pos != 0) {
-            /* READ & SCAN commands and realign to a sector for WRITE */
-#ifdef VBOX
-            rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
-            if (RT_FAILURE(rc))
-#else
-            if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
-                          fdctrl->fifo, 1) < 0)
-#endif
-            {
-                FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
-                               fd_sector(cur_drv));
-                /* Sure, image size is too small... */
-                memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
-            }
-        }
-        switch (fdctrl->data_dir) {
-        case FD_DIR_READ:
-            /* READ commands */
-#ifdef VBOX
-            {
-                uint32_t read;
-                int rc2 = PDMDevHlpDMAWriteMemory(fdctrl->pDevIns, nchan,
-                                                  fdctrl->fifo + rel_pos,
-                                                  fdctrl->data_pos,
-                                                  len, &read);
-                AssertMsgRC (rc2, ("DMAWriteMemory -> %Rrc\n", rc2));
-            }
-#else
-            DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
-                              fdctrl->data_pos, len);
-#endif
-/*          cpu_physical_memory_write(addr + fdctrl->data_pos, */
-/*                                    fdctrl->fifo + rel_pos, len); */
-            break;
-        case FD_DIR_WRITE:
-            /* WRITE commands */
-#ifdef VBOX
-            if (cur_drv->ro)
-            {
-                /* Handle readonly medium early, no need to do DMA, touch the
-                 * LED or attempt any writes. A real floppy doesn't attempt
-                 * to write to readonly media either. */
-                fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW,
-                                     0x00);
-                goto transfer_error;
-            }
-
-            {
-                uint32_t written;
-                int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
-                                                 fdctrl->fifo + rel_pos,
-                                                 fdctrl->data_pos,
-                                                 len, &written);
-                AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
-            }
-
-            rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
-            if (RT_FAILURE(rc))
-#else
-            DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
-                             fdctrl->data_pos, len);
-            if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
-                           fdctrl->fifo, 1) < 0)
-#endif
-            {
-                FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
-                fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
-                goto transfer_error;
-            }
-            break;
-        default:
-            /* SCAN commands */
-            {
-                uint8_t tmpbuf[FD_SECTOR_LEN];
-                int ret;
-#ifdef VBOX
-                uint32_t read;
-                int rc2 = PDMDevHlpDMAReadMemory (fdctrl->pDevIns, nchan, tmpbuf,
-                                                  fdctrl->data_pos, len, &read);
-                AssertMsg (RT_SUCCESS (rc2), ("DMAReadMemory -> %Rrc2\n", rc2));
-#else
-                DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
-#endif
-                ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
-                if (ret == 0) {
-                    status2 = FD_SR2_SEH;
-                    goto end_transfer;
-                }
-                if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
-                    (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
-                    status2 = 0x00;
-                    goto end_transfer;
-                }
-            }
-            break;
-        }
-        fdctrl->data_pos += len;
-        rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
-        if (rel_pos == 0) {
-            /* Seek to next sector */
-            if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
-                break;
-        }
-    }
-end_transfer:
-    len = fdctrl->data_pos - start_pos;
-    FLOPPY_DPRINTF("end transfer %d %d %d\n",
-                   fdctrl->data_pos, len, fdctrl->data_len);
-    if (fdctrl->data_dir == FD_DIR_SCANE ||
-        fdctrl->data_dir == FD_DIR_SCANL ||
-        fdctrl->data_dir == FD_DIR_SCANH)
-        status2 = FD_SR2_SEH;
-    if (FD_DID_SEEK(fdctrl->data_state))
-        status0 |= FD_SR0_SEEK;
-    fdctrl->data_len -= len;
-    fdctrl_stop_transfer(fdctrl, status0, status1, status2);
-transfer_error:
-
-    return len;
-}
-
-/* Data register : 0x05 */
-static uint32_t fdctrl_read_data(fdctrl_t *fdctrl)
-{
-    fdrive_t *cur_drv;
-    uint32_t retval = 0;
-    unsigned pos;
-#ifdef VBOX
-    int rc;
-#endif
-
-    cur_drv = get_cur_drv(fdctrl);
-    fdctrl->dsr &= ~FD_DSR_PWRDOWN;
-    if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) {
-        FLOPPY_ERROR("controller not ready for reading\n");
-        return 0;
-    }
-    pos = fdctrl->data_pos;
-    if (fdctrl->msr & FD_MSR_NONDMA) {
-        pos %= FD_SECTOR_LEN;
-        if (pos == 0) {
-            if (fdctrl->data_pos != 0)
-                if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
-                    FLOPPY_DPRINTF("error seeking to next sector %d\n",
-                                   fd_sector(cur_drv));
-                    return 0;
-                }
-#ifdef VBOX
-            rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
-            if (RT_FAILURE(rc))
-#else
-            if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0)
-#endif
-            {
-                FLOPPY_DPRINTF("error getting sector %d\n",
-                               fd_sector(cur_drv));
-                /* Sure, image size is too small... */
-                memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
-            }
-        }
-    }
-    retval = fdctrl->fifo[pos];
-    if (++fdctrl->data_pos == fdctrl->data_len) {
-        fdctrl->data_pos = 0;
-        /* Switch from transfer mode to status mode
-         * then from status mode to command mode
-         */
-        if (fdctrl->msr & FD_MSR_NONDMA) {
-            fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
-        } else {
-            fdctrl_reset_fifo(fdctrl);
-            fdctrl_reset_irq(fdctrl);
-        }
-    }
-    FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
-
-    return retval;
-}
-
-static void fdctrl_format_sector(fdctrl_t *fdctrl)
-{
-    fdrive_t *cur_drv;
-    uint8_t kh, kt, ks;
-#ifdef VBOX
-    int ok = 0, rc;
-#endif
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    kt = fdctrl->fifo[6];
-    kh = fdctrl->fifo[7];
-    ks = fdctrl->fifo[8];
-    FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
-                   GET_CUR_DRV(fdctrl), kh, kt, ks,
-                   fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
-    switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
-    case 2:
-        /* sect too big */
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    case 3:
-        /* track too big */
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    case 4:
-        /* No seek enabled */
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
-        fdctrl->fifo[3] = kt;
-        fdctrl->fifo[4] = kh;
-        fdctrl->fifo[5] = ks;
-        return;
-    case 1:
-        fdctrl->data_state |= FD_STATE_SEEK;
-        break;
-    default:
-        break;
-    }
-    memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
-#ifdef VBOX
-    if (cur_drv->pDrvBlock) {
-        rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
-        if (RT_FAILURE (rc)) {
-            FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
-            fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
-        } else {
-            ok = 1;
-        }
-    }
-    if (ok) {
-#else
-    if (cur_drv->bs == NULL ||
-        bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
-        FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
-    } else {
-#endif
-        if (cur_drv->sect == cur_drv->last_sect) {
-            fdctrl->data_state &= ~FD_STATE_FORMAT;
-            /* Last sector done */
-            if (FD_DID_SEEK(fdctrl->data_state))
-                fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
-            else
-                fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
-        } else {
-            /* More to do */
-            fdctrl->data_pos = 0;
-            fdctrl->data_len = 4;
-        }
-    }
-}
-
-static void fdctrl_handle_lock(fdctrl_t *fdctrl, int direction)
-{
-    fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
-    fdctrl->fifo[0] = fdctrl->lock << 4;
-    fdctrl_set_fifo(fdctrl, 1, 0);
-}
-
-static void fdctrl_handle_dumpreg(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    /* Drives position */
-    fdctrl->fifo[0] = drv0(fdctrl)->track;
-    fdctrl->fifo[1] = drv1(fdctrl)->track;
-#if MAX_FD == 4
-    fdctrl->fifo[2] = drv2(fdctrl)->track;
-    fdctrl->fifo[3] = drv3(fdctrl)->track;
-#else
-    fdctrl->fifo[2] = 0;
-    fdctrl->fifo[3] = 0;
-#endif
-    /* timers */
-    fdctrl->fifo[4] = fdctrl->timer0;
-    fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
-    fdctrl->fifo[6] = cur_drv->last_sect;
-    fdctrl->fifo[7] = (fdctrl->lock << 7) |
-        (cur_drv->perpendicular << 2);
-    fdctrl->fifo[8] = fdctrl->config;
-    fdctrl->fifo[9] = fdctrl->precomp_trk;
-    fdctrl_set_fifo(fdctrl, 10, 0);
-}
-
-static void fdctrl_handle_version(fdctrl_t *fdctrl, int direction)
-{
-    /* Controller's version */
-    fdctrl->fifo[0] = fdctrl->version;
-    fdctrl_set_fifo(fdctrl, 1, 0);
-}
-
-static void fdctrl_handle_partid(fdctrl_t *fdctrl, int direction)
-{
-    fdctrl->fifo[0] = 0x01; /* Stepping 1 */
-    fdctrl_set_fifo(fdctrl, 1, 0);
-}
-
-static void fdctrl_handle_restore(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    /* Drives position */
-    drv0(fdctrl)->track = fdctrl->fifo[3];
-    drv1(fdctrl)->track = fdctrl->fifo[4];
-#if MAX_FD == 4
-    drv2(fdctrl)->track = fdctrl->fifo[5];
-    drv3(fdctrl)->track = fdctrl->fifo[6];
-#endif
-    /* timers */
-    fdctrl->timer0 = fdctrl->fifo[7];
-    fdctrl->timer1 = fdctrl->fifo[8];
-    cur_drv->last_sect = fdctrl->fifo[9];
-    fdctrl->lock = fdctrl->fifo[10] >> 7;
-    cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
-    fdctrl->config = fdctrl->fifo[11];
-    fdctrl->precomp_trk = fdctrl->fifo[12];
-    fdctrl->pwrd = fdctrl->fifo[13];
-    fdctrl_reset_fifo(fdctrl);
-}
-
-static void fdctrl_handle_save(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    fdctrl->fifo[0] = 0;
-    fdctrl->fifo[1] = 0;
-    /* Drives position */
-    fdctrl->fifo[2] = drv0(fdctrl)->track;
-    fdctrl->fifo[3] = drv1(fdctrl)->track;
-#if MAX_FD == 4
-    fdctrl->fifo[4] = drv2(fdctrl)->track;
-    fdctrl->fifo[5] = drv3(fdctrl)->track;
-#else
-    fdctrl->fifo[4] = 0;
-    fdctrl->fifo[5] = 0;
-#endif
-    /* timers */
-    fdctrl->fifo[6] = fdctrl->timer0;
-    fdctrl->fifo[7] = fdctrl->timer1;
-    fdctrl->fifo[8] = cur_drv->last_sect;
-    fdctrl->fifo[9] = (fdctrl->lock << 7) |
-        (cur_drv->perpendicular << 2);
-    fdctrl->fifo[10] = fdctrl->config;
-    fdctrl->fifo[11] = fdctrl->precomp_trk;
-    fdctrl->fifo[12] = fdctrl->pwrd;
-    fdctrl->fifo[13] = 0;
-    fdctrl->fifo[14] = 0;
-    fdctrl_set_fifo(fdctrl, 15, 0);
-}
-
-static void fdctrl_handle_readid(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    /* XXX: should set main status register to busy */
-    cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
-#ifdef VBOX
-    TMTimerSetMillies(fdctrl->result_timer, 1000 / 50);
-#else
-    qemu_mod_timer(fdctrl->result_timer,
-                   qemu_get_clock(vm_clock) + (get_ticks_per_sec() / 50));
-#endif
-}
-
-static void fdctrl_handle_format_track(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    fdctrl->data_state |= FD_STATE_FORMAT;
-    if (fdctrl->fifo[0] & 0x80)
-        fdctrl->data_state |= FD_STATE_MULTI;
-    else
-        fdctrl->data_state &= ~FD_STATE_MULTI;
-    fdctrl->data_state &= ~FD_STATE_SEEK;
-    cur_drv->bps =
-        fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
-#if 0
-    cur_drv->last_sect =
-        cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
-        fdctrl->fifo[3] / 2;
-#else
-    cur_drv->last_sect = fdctrl->fifo[3];
-#endif
-    /* TODO: implement format using DMA expected by the Bochs BIOS
-     * and Linux fdformat (read 3 bytes per sector via DMA and fill
-     * the sector with the specified fill byte
-     */
-    fdctrl->data_state &= ~FD_STATE_FORMAT;
-    fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
-}
-
-static void fdctrl_handle_specify(fdctrl_t *fdctrl, int direction)
-{
-    fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
-    fdctrl->timer1 = fdctrl->fifo[2] >> 1;
-    if (fdctrl->fifo[2] & 1)
-        fdctrl->dor &= ~FD_DOR_DMAEN;
-    else
-        fdctrl->dor |= FD_DOR_DMAEN;
-    /* No result back */
-    fdctrl_reset_fifo(fdctrl);
-}
-
-static void fdctrl_handle_sense_drive_status(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
-    /* 1 Byte status back */
-    fdctrl->fifo[0] = (cur_drv->ro << 6) |
-        (cur_drv->track == 0 ? 0x10 : 0x00) |
-        (cur_drv->head << 2) |
-        GET_CUR_DRV(fdctrl) |
-        0x28;
-    fdctrl_set_fifo(fdctrl, 1, 0);
-}
-
-static void fdctrl_handle_recalibrate(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    fd_recalibrate(cur_drv);
-    fdctrl_reset_fifo(fdctrl);
-    /* Raise Interrupt */
-    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
-}
-
-static void fdctrl_handle_sense_interrupt_status(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    if(fdctrl->reset_sensei > 0) {
-        fdctrl->fifo[0] =
-            FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
-        fdctrl->reset_sensei--;
-    } else {
-        /* XXX: status0 handling is broken for read/write
-           commands, so we do this hack. It should be suppressed
-           ASAP */
-        fdctrl->fifo[0] =
-            FD_SR0_SEEK | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
-    }
-
-    fdctrl->fifo[1] = cur_drv->track;
-    fdctrl_set_fifo(fdctrl, 2, 0);
-    fdctrl_reset_irq(fdctrl);
-    fdctrl->status0 = FD_SR0_RDYCHG;
-}
-
-static void fdctrl_handle_seek(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    fdctrl_reset_fifo(fdctrl);
-#ifdef VBOX
-    /* The seek command just sends step pulses to the drive and doesn't care if
-     * there's a medium inserted or if it's banging the head against the drive.
-     */
-    cur_drv->track = fdctrl->fifo[2];
-    /* Raise Interrupt */
-    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
-#else
-    if (fdctrl->fifo[2] > cur_drv->max_track) {
-        fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK);
-    } else {
-        cur_drv->track = fdctrl->fifo[2];
-        /* Raise Interrupt */
-        fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
-    }
-#endif
-}
-
-static void fdctrl_handle_perpendicular_mode(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    if (fdctrl->fifo[1] & 0x80)
-        cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
-    /* No result back */
-    fdctrl_reset_fifo(fdctrl);
-}
-
-static void fdctrl_handle_configure(fdctrl_t *fdctrl, int direction)
-{
-    fdctrl->config = fdctrl->fifo[2];
-    fdctrl->precomp_trk =  fdctrl->fifo[3];
-    /* No result back */
-    fdctrl_reset_fifo(fdctrl);
-}
-
-static void fdctrl_handle_powerdown_mode(fdctrl_t *fdctrl, int direction)
-{
-    fdctrl->pwrd = fdctrl->fifo[1];
-    fdctrl->fifo[0] = fdctrl->fifo[1];
-    fdctrl_set_fifo(fdctrl, 1, 0);
-}
-
-static void fdctrl_handle_option(fdctrl_t *fdctrl, int direction)
-{
-    /* No result back */
-    fdctrl_reset_fifo(fdctrl);
-}
-
-static void fdctrl_handle_drive_specification_command(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
-        /* Command parameters done */
-        if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
-            fdctrl->fifo[0] = fdctrl->fifo[1];
-            fdctrl->fifo[2] = 0;
-            fdctrl->fifo[3] = 0;
-            fdctrl_set_fifo(fdctrl, 4, 0);
-        } else {
-            fdctrl_reset_fifo(fdctrl);
-        }
-    } else if (fdctrl->data_len > 7) {
-        /* ERROR */
-        fdctrl->fifo[0] = 0x80 |
-            (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
-        fdctrl_set_fifo(fdctrl, 1, 0);
-    }
-}
-
-static void fdctrl_handle_relative_seek_out(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
-        cur_drv->track = cur_drv->max_track - 1;
-    } else {
-        cur_drv->track += fdctrl->fifo[2];
-    }
-    fdctrl_reset_fifo(fdctrl);
-    /* Raise Interrupt */
-    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
-}
-
-static void fdctrl_handle_relative_seek_in(fdctrl_t *fdctrl, int direction)
-{
-    fdrive_t *cur_drv;
-
-    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
-    cur_drv = get_cur_drv(fdctrl);
-    if (fdctrl->fifo[2] > cur_drv->track) {
-        cur_drv->track = 0;
-    } else {
-        cur_drv->track -= fdctrl->fifo[2];
-    }
-    fdctrl_reset_fifo(fdctrl);
-    /* Raise Interrupt */
-    fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
-}
-
-static const struct {
-    uint8_t value;
-    uint8_t mask;
-    const char* name;
-    int parameters;
-    void (*handler)(fdctrl_t *fdctrl, int direction);
-    int direction;
-} handlers[] = {
-    { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
-    { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
-    { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
-    { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
-    { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
-    { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
-    { FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
-    { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
-    { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
-    { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
-    { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
-    { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
-    { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
-    { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
-    { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
-    { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
-    { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
-    { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
-    { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
-    { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
-    { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
-    { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
-    { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command },
-    { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
-    { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
-    { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
-    { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
-    { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
-    { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
-    { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
-    { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
-    { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
-};
-/* Associate command to an index in the 'handlers' array */
-static uint8_t command_to_handler[256];
-
-static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value)
-{
-    fdrive_t *cur_drv;
-    int pos;
-
-    cur_drv = get_cur_drv(fdctrl);
-    /* Reset mode */
-    if (!(fdctrl->dor & FD_DOR_nRESET)) {
-        FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
-        return;
-    }
-    if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) {
-        FLOPPY_ERROR("controller not ready for writing\n");
-        return;
-    }
-    fdctrl->dsr &= ~FD_DSR_PWRDOWN;
-    /* Is it write command time ? */
-    if (fdctrl->msr & FD_MSR_NONDMA) {
-        /* FIFO data write */
-        pos = fdctrl->data_pos++;
-        pos %= FD_SECTOR_LEN;
-        fdctrl->fifo[pos] = value;
-        if (pos == FD_SECTOR_LEN - 1 ||
-            fdctrl->data_pos == fdctrl->data_len) {
-#ifdef VBOX
-            blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
-#else
-            bdrv_write(cur_drv->bs, fd_sector(cur_drv),
-                       fdctrl->fifo, 1);
-#endif
-        }
-        /* Switch from transfer mode to status mode
-         * then from status mode to command mode
-         */
-        if (fdctrl->data_pos == fdctrl->data_len)
-            fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
-        return;
-    }
-    if (fdctrl->data_pos == 0) {
-        /* Command */
-        pos = command_to_handler[value & 0xff];
-        FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
-        fdctrl->data_len = handlers[pos].parameters + 1;
-        fdctrl->msr |= FD_MSR_CMDBUSY;
-    }
-
-    FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
-    fdctrl->fifo[fdctrl->data_pos++] = value;
-    if (fdctrl->data_pos == fdctrl->data_len) {
-        /* We now have all parameters
-         * and will be able to treat the command
-         */
-        if (fdctrl->data_state & FD_STATE_FORMAT) {
-            fdctrl_format_sector(fdctrl);
-            return;
-        }
-
-        pos = command_to_handler[fdctrl->fifo[0] & 0xff];
-        FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
-        (*handlers[pos].handler)(fdctrl, handlers[pos].direction);
-    }
-}
-
-static void fdctrl_result_timer(void *opaque)
-{
-    fdctrl_t *fdctrl = opaque;
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
-
-    /* Pretend we are spinning.
-     * This is needed for Coherent, which uses READ ID to check for
-     * sector interleaving.
-     */
-    if (cur_drv->last_sect != 0) {
-        cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
-    }
-    /* READ_ID can't automatically succeed! */
-#ifdef VBOX
-    if (/* !cur_drv->fMediaPresent || */
-        ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate)) {
-        FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
-                       fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
-        fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
-    }
-    else
-#endif
-        fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
-}
-
-#ifdef VBOX
-static DECLCALLBACK(void) fdc_timer (PPDMDEVINS pDevIns, PTMTIMER pTimer, void *pvUser)
-{
-    fdctrl_t *fdctrl = (fdctrl_t *)pvUser;
-    fdctrl_result_timer (fdctrl);
-}
-
-static DECLCALLBACK(int) fdc_io_write (PPDMDEVINS pDevIns,
-                                       void *pvUser,
-                                       RTIOPORT Port,
-                                       uint32_t u32,
-                                       unsigned cb)
-{
-    if (cb == 1) {
-        fdctrl_write (pvUser, Port & 7, u32);
-    }
-    else {
-        AssertMsgFailed(("Port=%#x cb=%d u32=%#x\n", Port, cb, u32));
-    }
-    return VINF_SUCCESS;
-}
-
-static DECLCALLBACK(int) fdc_io_read (PPDMDEVINS pDevIns,
-                                      void *pvUser,
-                                      RTIOPORT Port,
-                                      uint32_t *pu32,
-                                      unsigned cb)
-{
-    if (cb == 1) {
-        *pu32 = fdctrl_read (pvUser, Port & 7);
-        return VINF_SUCCESS;
-    }
-    else {
-        return VERR_IOM_IOPORT_UNUSED;
-    }
-}
-
-static DECLCALLBACK(int) fdcSaveExec (PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle)
-{
-    fdctrl_t *s = PDMINS_2_DATA (pDevIns, fdctrl_t *);
-    QEMUFile *f = pSSMHandle;
-    unsigned int i;
-
-    /* Save the FDC I/O registers... */
-    SSMR3PutU8(pSSMHandle, s->sra);
-    SSMR3PutU8(pSSMHandle, s->srb);
-    SSMR3PutU8(pSSMHandle, s->dor);
-    SSMR3PutU8(pSSMHandle, s->tdr);
-    SSMR3PutU8(pSSMHandle, s->dsr);
-    SSMR3PutU8(pSSMHandle, s->msr);
-    /* ...the status registers... */
-    SSMR3PutU8(pSSMHandle, s->status0);
-    SSMR3PutU8(pSSMHandle, s->status1);
-    SSMR3PutU8(pSSMHandle, s->status2);
-    /* ...the command FIFO... */
-    SSMR3PutU32(pSSMHandle, sizeof(s->fifo));
-    SSMR3PutMem(pSSMHandle, &s->fifo, sizeof(s->fifo));
-    SSMR3PutU32(pSSMHandle, s->data_pos);
-    SSMR3PutU32(pSSMHandle, s->data_len);
-    SSMR3PutU8(pSSMHandle, s->data_state);
-    SSMR3PutU8(pSSMHandle, s->data_dir);
-    /* ...and miscellaneous internal FDC state. */
-    SSMR3PutU8(pSSMHandle, s->reset_sensei);
-    SSMR3PutU8(pSSMHandle, s->eot);
-    SSMR3PutU8(pSSMHandle, s->timer0);
-    SSMR3PutU8(pSSMHandle, s->timer1);
-    SSMR3PutU8(pSSMHandle, s->precomp_trk);
-    SSMR3PutU8(pSSMHandle, s->config);
-    SSMR3PutU8(pSSMHandle, s->lock);
-    SSMR3PutU8(pSSMHandle, s->pwrd);
-    SSMR3PutU8(pSSMHandle, s->version);
-
-    /* Save the number of drives and per-drive state. Note that the media
-     * states will be updated in fd_revalidate() and need not be saved.
-     */
-    SSMR3PutU8(pSSMHandle, s->num_floppies);
-    Assert(RT_ELEMENTS(s->drives) == s->num_floppies);
-    for (i = 0; i < s->num_floppies; ++i) {
-        fdrive_t *d = &s->drives[i];
-
-        SSMR3PutMem(pSSMHandle, &d->Led, sizeof(d->Led));
-        SSMR3PutU32(pSSMHandle, d->drive);
-        SSMR3PutU8(pSSMHandle, d->dsk_chg);
-        SSMR3PutU8(pSSMHandle, d->perpendicular);
-        SSMR3PutU8(pSSMHandle, d->head);
-        SSMR3PutU8(pSSMHandle, d->track);
-        SSMR3PutU8(pSSMHandle, d->sect);
-    }
-    return TMR3TimerSave (s->result_timer, pSSMHandle);
-}
-
-static DECLCALLBACK(int) fdcLoadExec (PPDMDEVINS pDevIns,
-                                      PSSMHANDLE pSSMHandle,
-                                      uint32_t uVersion,
-                                      uint32_t uPass)
-{
-    fdctrl_t *s = PDMINS_2_DATA (pDevIns, fdctrl_t *);
-    QEMUFile *f = pSSMHandle;
-    unsigned int i;
-    uint32_t val32;
-    uint8_t val8;
-
-    if (uVersion > FDC_SAVESTATE_CURRENT)
-        return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
-    Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
-
-    /* The old saved state was significantly different. However, we can get
-     * back most of the controller state and fix the rest by pretending the
-     * disk in the drive (if any) has been replaced. At any rate there should
-     * be no difficulty unless the state was saved during a floppy operation.
-     */
-    if (uVersion == FDC_SAVESTATE_OLD)
-    {
-        /* First verify a few assumptions. */
-        AssertMsgReturn(sizeof(s->fifo) == FD_SECTOR_LEN,
-                        ("The size of FIFO in saved state doesn't match!\n"),
-                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
-        AssertMsgReturn(RT_ELEMENTS(s->drives) == 2,
-                        ("The number of drives in old saved state doesn't match!\n"),
-                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
-        /* Now load the old state. */
-        SSMR3GetU8(pSSMHandle, &s->version);
-        /* Toss IRQ level, DMA channel, I/O base, and state. */
-        SSMR3GetU8(pSSMHandle, &val8);
-        SSMR3GetU8(pSSMHandle, &val8);
-        SSMR3GetU32(pSSMHandle, &val32);
-        SSMR3GetU8(pSSMHandle, &val8);
-        /* Translate dma_en. */
-        SSMR3GetU8(pSSMHandle, &val8);
-        if (val8)
-            s->dor |= FD_DOR_DMAEN;
-        SSMR3GetU8(pSSMHandle, &s->cur_drv);
-        /* Translate bootsel. */
-        SSMR3GetU8(pSSMHandle, &val8);
-        s->tdr |= val8 << 2;
-        SSMR3GetMem(pSSMHandle, &s->fifo, FD_SECTOR_LEN);
-        SSMR3GetU32(pSSMHandle, &s->data_pos);
-        SSMR3GetU32(pSSMHandle, &s->data_len);
-        SSMR3GetU8(pSSMHandle, &s->data_state);
-        SSMR3GetU8(pSSMHandle, &s->data_dir);
-        SSMR3GetU8(pSSMHandle, &s->status0);
-        SSMR3GetU8(pSSMHandle, &s->eot);
-        SSMR3GetU8(pSSMHandle, &s->timer0);
-        SSMR3GetU8(pSSMHandle, &s->timer1);
-        SSMR3GetU8(pSSMHandle, &s->precomp_trk);
-        SSMR3GetU8(pSSMHandle, &s->config);
-        SSMR3GetU8(pSSMHandle, &s->lock);
-        SSMR3GetU8(pSSMHandle, &s->pwrd);
-
-        for (i = 0; i < 2; ++i) {
-            fdrive_t *d = &s->drives[i];
-
-            SSMR3GetMem (pSSMHandle, &d->Led, sizeof (d->Led));
-            SSMR3GetU32(pSSMHandle, &val32);
-            d->drive = val32;
-            SSMR3GetU32(pSSMHandle, &val32);    /* Toss drflags */
-            SSMR3GetU8(pSSMHandle, &d->perpendicular);
-            SSMR3GetU8(pSSMHandle, &d->head);
-            SSMR3GetU8(pSSMHandle, &d->track);
-            SSMR3GetU8(pSSMHandle, &d->sect);
-            SSMR3GetU8(pSSMHandle, &val8);      /* Toss dir, rw */
-            SSMR3GetU8(pSSMHandle, &val8);
-            SSMR3GetU32(pSSMHandle, &val32);
-            d->flags = val32;
-            SSMR3GetU8(pSSMHandle, &d->last_sect);
-            SSMR3GetU8(pSSMHandle, &d->max_track);
-            SSMR3GetU16(pSSMHandle, &d->bps);
-            SSMR3GetU8(pSSMHandle, &d->ro);
-        }
-    }
-    else    /* New state - straightforward. */
-    {
-        Assert(uVersion == FDC_SAVESTATE_CURRENT);
-        /* Load the FDC I/O registers... */
-        SSMR3GetU8(pSSMHandle, &s->sra);
-        SSMR3GetU8(pSSMHandle, &s->srb);
-        SSMR3GetU8(pSSMHandle, &s->dor);
-        SSMR3GetU8(pSSMHandle, &s->tdr);
-        SSMR3GetU8(pSSMHandle, &s->dsr);
-        SSMR3GetU8(pSSMHandle, &s->msr);
-        /* ...the status registers... */
-        SSMR3GetU8(pSSMHandle, &s->status0);
-        SSMR3GetU8(pSSMHandle, &s->status1);
-        SSMR3GetU8(pSSMHandle, &s->status2);
-        /* ...the command FIFO, if the size matches... */
-        SSMR3GetU32(pSSMHandle, &val32);
-        AssertMsgReturn(sizeof(s->fifo) == val32,
-                        ("The size of FIFO in saved state doesn't match!\n"),
-                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
-        SSMR3GetMem(pSSMHandle, &s->fifo, sizeof(s->fifo));
-        SSMR3GetU32(pSSMHandle, &s->data_pos);
-        SSMR3GetU32(pSSMHandle, &s->data_len);
-        SSMR3GetU8(pSSMHandle, &s->data_state);
-        SSMR3GetU8(pSSMHandle, &s->data_dir);
-        /* ...and miscellaneous internal FDC state. */
-        SSMR3GetU8(pSSMHandle, &s->reset_sensei);
-        SSMR3GetU8(pSSMHandle, &s->eot);
-        SSMR3GetU8(pSSMHandle, &s->timer0);
-        SSMR3GetU8(pSSMHandle, &s->timer1);
-        SSMR3GetU8(pSSMHandle, &s->precomp_trk);
-        SSMR3GetU8(pSSMHandle, &s->config);
-        SSMR3GetU8(pSSMHandle, &s->lock);
-        SSMR3GetU8(pSSMHandle, &s->pwrd);
-        SSMR3GetU8(pSSMHandle, &s->version);
-
-        /* Validate the number of drives. */
-        SSMR3GetU8(pSSMHandle, &s->num_floppies);
-        AssertMsgReturn(RT_ELEMENTS(s->drives) == s->num_floppies,
-                        ("The number of drives in saved state doesn't match!\n"),
-                        VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
-
-        /* Load the per-drive state. */
-        for (i = 0; i < s->num_floppies; ++i) {
-            fdrive_t *d = &s->drives[i];
-
-            SSMR3GetMem(pSSMHandle, &d->Led, sizeof(d->Led));
-            SSMR3GetU32(pSSMHandle, &val32);
-            d->drive = val32;
-            SSMR3GetU8(pSSMHandle, &d->dsk_chg);
-            SSMR3GetU8(pSSMHandle, &d->perpendicular);
-            SSMR3GetU8(pSSMHandle, &d->head);
-            SSMR3GetU8(pSSMHandle, &d->track);
-            SSMR3GetU8(pSSMHandle, &d->sect);
-        }
-    }
-    return TMR3TimerLoad (s->result_timer, pSSMHandle);
-}
-
-/**
- * @interface_method_impl{PDMIBASE,pfnQueryInterface}
- */
-static DECLCALLBACK(void *) fdQueryInterface (PPDMIBASE pInterface, const char *pszIID)
-{
-    fdrive_t *pDrive = PDMIBASE_2_FDRIVE(pInterface);
-
-    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrive->IBase);
-    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBLOCKPORT, &pDrive->IPort);
-    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUNTNOTIFY, &pDrive->IMountNotify);
-    return NULL;
-}
-
-/**
- * Gets the pointer to the status LED of a unit.
- *
- * @returns VBox status code.
- * @param   pInterface      Pointer to the interface structure containing the called function pointer.
- * @param   iLUN            The unit which status LED we desire.
- * @param   ppLed           Where to store the LED pointer.
- */
-static DECLCALLBACK(int) fdcStatusQueryStatusLed (PPDMILEDPORTS pInterface,
-                                                  unsigned iLUN,
-                                                  PPDMLED *ppLed)
-{
-    fdctrl_t *fdctrl = (fdctrl_t *)
-        ((uintptr_t )pInterface - RT_OFFSETOF (fdctrl_t, ILeds));
-    if (iLUN < RT_ELEMENTS(fdctrl->drives)) {
-        *ppLed = &fdctrl->drives[iLUN].Led;
-        Assert ((*ppLed)->u32Magic == PDMLED_MAGIC);
-        return VINF_SUCCESS;
-    }
-    return VERR_PDM_LUN_NOT_FOUND;
-}
-
-
-/**
- * @interface_method_impl{PDMIBASE,pfnQueryInterface}
- */
-static DECLCALLBACK(void *) fdcStatusQueryInterface(PPDMIBASE pInterface, const char *pszIID)
-{
-    fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, IBaseStatus);
-
-    PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThis->IBaseStatus);
-    PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThis->ILeds);
-    return NULL;
-}
-
-
-/**
- * Configure a drive.
- *
- * @returns VBox status code.
- * @param   drv         The drive in question.
- * @param   pDevIns     The driver instance.
- */
-static int fdConfig (fdrive_t *drv, PPDMDEVINS pDevIns)
-{
-    static const char *descs[] = {"Floppy Drive A:", "Floppy Drive B"};
-    int rc;
-
-    /*
-     * Reset the LED just to be on the safe side.
-     */
-    Assert (RT_ELEMENTS(descs) > drv->iLUN);
-    Assert (drv->Led.u32Magic == PDMLED_MAGIC);
-    drv->Led.Actual.u32 = 0;
-    drv->Led.Asserted.u32 = 0;
-
-    /*
-     * Try attach the block device and get the interfaces.
-     */
-    rc = PDMDevHlpDriverAttach (pDevIns, drv->iLUN, &drv->IBase, &drv->pDrvBase, descs[drv->iLUN]);
-    if (RT_SUCCESS (rc)) {
-        drv->pDrvBlock = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIBLOCK);
-        if (drv->pDrvBlock) {
-            drv->pDrvBlockBios = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIBLOCKBIOS);
-            if (drv->pDrvBlockBios) {
-                drv->pDrvMount = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMOUNT);
-                if (drv->pDrvMount) {
-                    fd_init(drv);
-                } else {
-                    AssertMsgFailed (("Configuration error: LUN#%d without mountable interface!\n", drv->iLUN));
-                    rc = VERR_PDM_MISSING_INTERFACE;
-                }
-
-            } else {
-                AssertMsgFailed (("Configuration error: LUN#%d hasn't a block BIOS interface!\n", drv->iLUN));
-                rc = VERR_PDM_MISSING_INTERFACE;
-            }
-
-        } else {
-            AssertMsgFailed (("Configuration error: LUN#%d hasn't a block interface!\n", drv->iLUN));
-            rc = VERR_PDM_MISSING_INTERFACE;
-        }
-    } else {
-        AssertMsg (rc == VERR_PDM_NO_ATTACHED_DRIVER,
-                   ("Failed to attach LUN#%d. rc=%Rrc\n", drv->iLUN, rc));
-        switch (rc) {
-        case VERR_ACCESS_DENIED:
-            /* Error already cached by DrvHostBase */
-            break;
-        case VERR_PDM_NO_ATTACHED_DRIVER:
-            /* Legal on architectures without a floppy controller */
-            break;
-        default:
-            rc = PDMDevHlpVMSetError (pDevIns, rc, RT_SRC_POS,
-                                      N_ ("The floppy controller cannot attach to the floppy drive"));
-            break;
-        }
-    }
-
-    if (RT_FAILURE (rc)) {
-        drv->pDrvBase = NULL;
-        drv->pDrvBlock = NULL;
-        drv->pDrvBlockBios = NULL;
-        drv->pDrvMount = NULL;
-    }
-    LogFlow (("fdConfig: returns %Rrc\n", rc));
-    return rc;
-}
-
-
-/**
- * Attach command.
- *
- * This is called when we change block driver for a floppy drive.
- *
- * @returns VBox status code.
- * @param   pDevIns     The device instance.
- * @param   iLUN        The logical unit which is being detached.
- */
-static DECLCALLBACK(int)  fdcAttach (PPDMDEVINS pDevIns,
-                                     unsigned iLUN, uint32_t fFlags)
-{
-    fdctrl_t *fdctrl = PDMINS_2_DATA (pDevIns, fdctrl_t *);
-    fdrive_t *drv;
-    int rc;
-    LogFlow (("ideDetach: iLUN=%u\n", iLUN));
-
-    AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
-                    ("The FDC device does not support hotplugging\n"),
-                    VERR_INVALID_PARAMETER);
-
-    /*
-     * Validate.
-     */
-    if (iLUN >= 2) {
-        AssertMsgFailed (("Configuration error: cannot attach or detach any but the first two LUNs - iLUN=%u\n",
-                          iLUN));
-        return VERR_PDM_DEVINS_NO_ATTACH;
-    }
-
-    /*
-     * Locate the drive and stuff.
-     */
-    drv = &fdctrl->drives[iLUN];
-
-    /* the usual paranoia */
-    AssertRelease (!drv->pDrvBase);
-    AssertRelease (!drv->pDrvBlock);
-    AssertRelease (!drv->pDrvBlockBios);
-    AssertRelease (!drv->pDrvMount);
-
-    rc = fdConfig (drv, pDevIns);
-    AssertMsg (rc != VERR_PDM_NO_ATTACHED_DRIVER,
-               ("Configuration error: failed to configure drive %d, rc=%Rrc\n", rc));
-    if (RT_SUCCESS(rc)) {
-        fd_revalidate (drv);
-    }
-
-    LogFlow (("floppyAttach: returns %Rrc\n", rc));
-    return rc;
-}
-
-
-/**
- * Detach notification.
- *
- * The floppy drive has been temporarily 'unplugged'.
- *
- * @param   pDevIns     The device instance.
- * @param   iLUN        The logical unit which is being detached.
- */
-static DECLCALLBACK(void) fdcDetach (PPDMDEVINS pDevIns,
-                                     unsigned iLUN, uint32_t fFlags)
-{
-    fdctrl_t *fdctrl = PDMINS_2_DATA (pDevIns, fdctrl_t *);
-    LogFlow (("ideDetach: iLUN=%u\n", iLUN));
-
-    switch (iLUN) {
-    case 0:
-    case 1: {
-        fdrive_t *drv = &fdctrl->drives[iLUN];
-        drv->pDrvBase = NULL;
-        drv->pDrvBlock = NULL;
-        drv->pDrvBlockBios = NULL;
-        drv->pDrvMount = NULL;
-        break;
-    }
-
-    default:
-        AssertMsgFailed (("Cannot detach LUN#%d!\n", iLUN));
-        break;
-    }
-}
-
-
-/**
- * Handle reset.
- *
- * I haven't check the specs on what's supposed to happen on reset, but we
- * should get any 'FATAL: floppy recal:f07 ctrl not ready' when resetting
- * at wrong time like we do if this was all void.
- *
- * @param   pDevIns     The device instance.
- */
-static DECLCALLBACK(void) fdcReset (PPDMDEVINS pDevIns)
-{
-    fdctrl_t *fdctrl = PDMINS_2_DATA (pDevIns, fdctrl_t *);
-    unsigned i;
-    LogFlow (("fdcReset:\n"));
-
-    fdctrl_reset(fdctrl, 0);
-
-    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); i++) {
-        fd_revalidate(&fdctrl->drives[i]);
-    }
-}
-
-
-/**
- * @interface_method_impl{PDMDEVREG,pfnConstruct}
- */
-static DECLCALLBACK(int) fdcConstruct (PPDMDEVINS pDevIns,
-                                       int iInstance,
-                                       PCFGMNODE pCfg)
-{
-    int            rc;
-    fdctrl_t       *fdctrl = PDMINS_2_DATA(pDevIns, fdctrl_t*);
-    unsigned       i, j;
-    int            ii;
-    bool           mem_mapped;
-    uint16_t       io_base;
-    uint8_t        irq_lvl, dma_chann;
-    PPDMIBASE      pBase;
-
-    Assert(iInstance == 0);
-    PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
-
-    /*
-     * Validate configuration.
-     */
-    if (!CFGMR3AreValuesValid(pCfg, "IRQ\0DMA\0MemMapped\0IOBase\0"))
-        return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
-
-    /*
-     * Read the configuration.
-     */
-    rc = CFGMR3QueryU8 (pCfg, "IRQ", &irq_lvl);
-    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
-        irq_lvl = 6;
-    else if (RT_FAILURE (rc)) {
-        AssertMsgFailed (("Configuration error: Failed to read U8 IRQ, rc=%Rrc\n", rc));
-        return rc;
-    }
-
-    rc = CFGMR3QueryU8 (pCfg, "DMA", &dma_chann);
-    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
-        dma_chann = 2;
-    else if (RT_FAILURE (rc)) {
-        AssertMsgFailed (("Configuration error: Failed to read U8 DMA, rc=%Rrc\n", rc));
-        return rc;
-    }
-
-    rc = CFGMR3QueryU16 (pCfg, "IOBase", &io_base);
-    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
-        io_base = 0x3f0;
-    else if (RT_FAILURE (rc)) {
-        AssertMsgFailed (("Configuration error: Failed to read U16 IOBase, rc=%Rrc\n", rc));
-        return rc;
-    }
-
-    rc = CFGMR3QueryBool (pCfg, "MemMapped", &mem_mapped);
-    if (rc == VERR_CFGM_VALUE_NOT_FOUND)
-        mem_mapped = false;
-    else if (RT_FAILURE (rc)) {
-        AssertMsgFailed (("Configuration error: Failed to read bool value MemMapped rc=%Rrc\n", rc));
-        return rc;
-    }
-
-    /*
-     * Initialize data.
-     */
-    LogFlow(("fdcConstruct: irq_lvl=%d dma_chann=%d io_base=%#x\n", irq_lvl, dma_chann, io_base));
-    fdctrl->pDevIns   = pDevIns;
-    fdctrl->version   = 0x90;   /* Intel 82078 controller */
-    fdctrl->irq_lvl   = irq_lvl;
-    fdctrl->dma_chann = dma_chann;
-    fdctrl->io_base   = io_base;
-    fdctrl->config    = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
-    fdctrl->num_floppies = MAX_FD;
-
-    /* Fill 'command_to_handler' lookup table */
-    for (ii = RT_ELEMENTS(handlers) - 1; ii >= 0; ii--) {
-        for (j = 0; j < sizeof(command_to_handler); j++) {
-            if ((j & handlers[ii].mask) == handlers[ii].value) {
-                command_to_handler[j] = ii;
-            }
-        }
-    }
-
-    fdctrl->IBaseStatus.pfnQueryInterface = fdcStatusQueryInterface;
-    fdctrl->ILeds.pfnQueryStatusLed = fdcStatusQueryStatusLed;
-
-    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); ++i) {
-        fdrive_t *drv = &fdctrl->drives[i];
-
-        drv->drive = FDRIVE_DRV_NONE;
-        drv->iLUN = i;
-
-        drv->IBase.pfnQueryInterface = fdQueryInterface;
-        drv->IMountNotify.pfnMountNotify = fdMountNotify;
-        drv->IMountNotify.pfnUnmountNotify = fdUnmountNotify;
-        drv->Led.u32Magic = PDMLED_MAGIC;
-    }
-
-    /*
-     * Create the FDC timer.
-     */
-    rc = PDMDevHlpTMTimerCreate(pDevIns, TMCLOCK_VIRTUAL, fdc_timer, fdctrl,
-                                TMTIMER_FLAGS_DEFAULT_CRIT_SECT, "FDC Timer", &fdctrl->result_timer);
-    if (RT_FAILURE (rc))
-        return rc;
-
-    /*
-     * Register DMA channel.
-     */
-    if (fdctrl->dma_chann != 0xff) {
-        rc = PDMDevHlpDMARegister (pDevIns, dma_chann, &fdctrl_transfer_handler, fdctrl);
-        if (RT_FAILURE (rc))
-            return rc;
-    }
-
-    /*
-     * IO / MMIO.
-     */
-    if (mem_mapped) {
-        AssertMsgFailed (("Memory mapped floppy not support by now\n"));
-        return VERR_NOT_SUPPORTED;
-#if 0
-        FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
-        io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
-        cpu_register_physical_memory(base, 0x08, io_mem);
-#endif
-    } else {
-        rc = PDMDevHlpIOPortRegister (pDevIns, io_base + 0x1, 5, fdctrl,
-                                      fdc_io_write, fdc_io_read, NULL, NULL, "FDC#1");
-        if (RT_FAILURE (rc))
-            return rc;
-
-        rc = PDMDevHlpIOPortRegister (pDevIns, io_base + 0x7, 1, fdctrl,
-                                      fdc_io_write, fdc_io_read, NULL, NULL, "FDC#2");
-        if (RT_FAILURE (rc))
-            return rc;
-    }
-
-    /*
-     * Register the saved state data unit.
-     */
-    rc = PDMDevHlpSSMRegister (pDevIns, FDC_SAVESTATE_CURRENT, sizeof(*fdctrl), fdcSaveExec, fdcLoadExec);
-    if (RT_FAILURE(rc))
-        return rc;
-
-    /*
-     * Attach the status port (optional).
-     */
-    rc = PDMDevHlpDriverAttach (pDevIns, PDM_STATUS_LUN, &fdctrl->IBaseStatus, &pBase, "Status Port");
-    if (RT_SUCCESS (rc)) {
-        fdctrl->pLedsConnector = PDMIBASE_QUERY_INTERFACE(pBase, PDMILEDCONNECTORS);
-    } else if (rc != VERR_PDM_NO_ATTACHED_DRIVER) {
-        AssertMsgFailed (("Failed to attach to status driver. rc=%Rrc\n",
-                          rc));
-        return rc;
-    }
-
-    /*
-     * Initialize drives.
-     */
-    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); i++) {
-        fdrive_t *drv = &fdctrl->drives[i];
-        rc = fdConfig (drv, pDevIns);
-        if (    RT_FAILURE (rc)
-            &&  rc != VERR_PDM_NO_ATTACHED_DRIVER) {
-            AssertMsgFailed (("Configuration error: failed to configure drive %d, rc=%Rrc\n", rc));
-            return rc;
-        }
-    }
-
-    fdctrl_reset(fdctrl, 0);
-
-    for (i = 0; i < RT_ELEMENTS(fdctrl->drives); i++)
-        fd_revalidate(&fdctrl->drives[i]);
-
-    return VINF_SUCCESS;
-}
-
-/**
- * The device registration structure.
- */
-const PDMDEVREG g_DeviceFloppyController =
-{
-    /* u32Version */
-    PDM_DEVREG_VERSION,
-    /* szName */
-    "i82078",
-    /* szRCMod */
-    "",
-    /* szR0Mod */
-    "",
-    /* pszDescription */
-    "Floppy drive controller (Intel 82078)",
-    /* fFlags */
-    PDM_DEVREG_FLAGS_DEFAULT_BITS,
-    /* fClass */
-    PDM_DEVREG_CLASS_STORAGE,
-    /* cMaxInstances */
-    1,
-    /* cbInstance */
-    sizeof(fdctrl_t),
-    /* pfnConstruct */
-    fdcConstruct,
-    /* pfnDestruct */
-    NULL,
-    /* pfnRelocate */
-    NULL,
-    /* pfnIOCtl */
-    NULL,
-    /* pfnPowerOn */
-    NULL,
-    /* pfnReset */
-    fdcReset,
-    /* pfnSuspend */
-    NULL,
-    /* pfnResume */
-    NULL,
-    /* pfnAttach */
-    fdcAttach,
-    /* pfnDetach */
-    fdcDetach,
-    /* pfnQueryInterface. */
-    NULL,
-    /* pfnInitComplete */
-    NULL,
-    /* pfnPowerOff */
-    NULL,
-    /* pfnSoftReset */
-    NULL,
-    /* u32VersionEnd */
-    PDM_DEVREG_VERSION
-};
-
-#endif /* VBOX */
-
-/*
- * Local Variables:
- *  mode: c
- *  c-file-style: "k&r"
- *  indent-tabs-mode: nil
- * End:
- */
-
