Changeset 100674 in vbox for trunk/src/VBox/Devices/PC

Timestamp:

Jul 21, 2023 9:50:53 AM (19 months ago)

Author:

vboxsync

Message:

BIOS: Added 8086 alternative implementations for rep_insw and rep_outsw, allowing the ATA disk driver to work.

File:

• trunk/src/VBox/Devices/PC/BIOS/inlines.h (modified) (2 diffs)

trunk/src/VBox/Devices/PC/BIOS/inlines.h

@@ -160 +160 @@
 
 char __far *rep_insw(char __far *buffer, unsigned nwords, unsigned port);
+#if VBOX_BIOS_CPU >= 80286
 #pragma aux rep_insw = ".286" "rep insw" parm [es di] [cx] [dx] value [es di] modify exact [cx di];
+#else
+#pragma aux rep_insw = "next:" "in ax,dx" "stosw" "loop next" parm [es di] [cx] [dx] value [es di] modify exact [cx di];
+#endif
 
 # if VBOX_BIOS_CPU >= 80386
@@ -171 +175 @@
 
 char __far *rep_outsw(char __far *buffer, unsigned nwords, unsigned port);
+#if VBOX_BIOS_CPU >= 80286
 #pragma aux rep_outsw = ".286" "rep outs dx,word ptr es:[si]" parm [es si] [cx] [dx] value [es si] modify exact [cx si];
+#else
+#pragma aux rep_outsw = "next:" "lods word ptr es:[si]" "out dx,ax" "loop next" parm [es si] [cx] [dx] value [es si] modify exact [cx si];
+#endif
 
 # if VBOX_BIOS_CPU >= 80386