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identical mapping of first physical page in V86

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(some BIOSes use physical address of ds:si for int 13h)

git-svn-id: svn://kolibrios.org@1448 a494cfbc-eb01-0410-851d-a64ba20cac60
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Evgeny Grechnikov (Diamond)
2010-04-14 18:41:33 +00:00
parent 7ca326635d
commit 66d949f4b4
2 changed files with 16 additions and 16 deletions
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12
kernel/trunk/blkdev/hd_drv.inc
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@@ -882,11 +882,11 @@ int13_call:
; Because this code uses fixed addresses,
; it can not be run simultaniously by many threads.
; In current implementation it is protected by common mutex 'hd1_status'
mov word [BOOT_VAR + 510h], 10h ; packet length
mov word [BOOT_VAR + 512h], cx ; number of sectors
mov dword [BOOT_VAR + 514h], 9A000000h ; buffer 9A00:0000
mov dword [BOOT_VAR + 518h], eax
and dword [BOOT_VAR + 51Ch], 0
mov word [OS_BASE + 510h], 10h ; packet length
mov word [OS_BASE + 512h], cx ; number of sectors
mov dword [OS_BASE + 514h], 9A000000h ; buffer 9A00:0000
mov dword [OS_BASE + 518h], eax
and dword [OS_BASE + 51Ch], 0
push ebx ecx esi edi
mov ebx, int13_regs_in
mov edi, ebx
@@ -919,7 +919,7 @@ int13_call:
call v86_start
and [bios_hdpos], 0
pop edi esi ecx ebx
movzx edx, byte [BOOT_VAR + 512h]
movzx edx, byte [OS_BASE + 512h]
test byte [int13_regs_out+v86_regs.eflags], 1
jnz @f
mov edx, ecx