111 lines
1.7 KiB
PHP
111 lines
1.7 KiB
PHP
hd_phys_read:
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;eax - sector number
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;ebx - destination
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pushad
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call wait_for_hd_idle
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popad
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push edx
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push eax
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cli
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xor eax,eax
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mov edx,[hdbase]
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inc edx
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out dx,al
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inc edx
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inc eax
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out dx,al
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inc edx
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;write sector number.
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mov eax,[esp]
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out dx,al
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shr eax,8
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inc edx
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out dx,al
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shr eax,8
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inc edx
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out dx,al
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shr eax,8
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inc edx
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and al,1+2+4+8
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add al,byte [hdid] ;+0 or +16
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or al,32+64+128
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out dx,al
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inc edx
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mov al,0x20
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out dx,al
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sti
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call wait_for_sector_buffer
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cmp [hd_error],0
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jnz hd_read_error
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cli
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push edi
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mov edi,ebx
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mov ecx,256
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mov edx,[hdbase]
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cld
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rep insw
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pop edi
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sti
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pop edx
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pop eax
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ret
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hd_phys_write:
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;eax - sector number
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;ebx - destination
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cmp eax,[partition_start]
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jb .ret
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cmp eax,[partition_end]
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ja .ret
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pushad
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call wait_for_hd_idle
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popad
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push edx
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push eax
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cli
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xor eax,eax
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mov edx,[hdbase]
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inc edx
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out dx,al
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inc edx
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inc eax
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out dx,al
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;write sector number
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inc edx
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mov eax,[esp]
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out dx,al
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shr eax,8
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inc edx
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out dx,al
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shr eax,8
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inc edx
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out dx,al
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shr eax,8
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inc edx
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and al,1+2+4+8
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add al,byte [hdid] ;+0 or +16
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or al,32+64+128
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out dx,al
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inc edx
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mov al,0x30
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out dx,al
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sti
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call wait_for_sector_buffer
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cmp [hd_error],0
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jnz hd_write_error
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cli
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push esi
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mov esi,ebx
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mov ecx,256
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mov edx,[hdbase]
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cld
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rep outsw
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pop esi
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sti
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pop edx
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pop eax
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.ret:
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ret |