Changeset 44018 in vbox for trunk/src/VBox/Devices

Timestamp:

Dec 3, 2012 3:21:30 PM (12 years ago)

Author:

vboxsync

Message:

BIOS: Do not set DPT pointer for El Torito emulated harddisk.

File:

• trunk/src/VBox/Devices/PC/BIOS/eltorito.c (modified) (1 diff)

trunk/src/VBox/Devices/PC/BIOS/eltorito.c

@@ -587 +587 @@
 
         switch (cdemu->media) {
-        case 0x01: SET_BL( 0x02 ); break;
-        case 0x02: SET_BL( 0x04 ); break;
-        case 0x03: SET_BL( 0x06 ); break;
-        }
-
-        DI = (uint16_t)&diskette_param_table;   // @todo: or really DPT2?
-        ES = 0xF000;                            // @todo: how to make this relocatable?
+        case 0x01: SET_BL( 0x02 ); break;   /* 1.2 MB  */
+        case 0x02: SET_BL( 0x04 ); break;   /* 1.44 MB */
+        case 0x03: SET_BL( 0x05 ); break;   /* 2.88 MB */
+        }
+
+        /* Only set the DPT pointer for emulated floppies. */
+        if (cdemu->media < 4) {
+            DI = (uint16_t)&diskette_param_table;   // @todo: should this depend on emulated medium?
+            ES = 0xF000;                            // @todo: how to make this relocatable?
+        }
         goto int13_success;
         break;