Subversion Repositories Kolibri OS

Rev

Rev 1 | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. hd_phys_read:
  2. ;eax - sector number
  3. ;ebx - destination
  4.   pushad
  5.   call  wait_for_hd_idle
  6.   popad
  7.   push  edx
  8.   push  eax
  9.   cli
  10.   xor   eax,eax
  11.   mov   edx,[hdbase]
  12.   inc   edx
  13.   out   dx,al
  14.   inc   edx
  15.   inc   eax
  16.   out   dx,al
  17.   inc   edx
  18. ;write sector number.  
  19.   mov   eax,[esp]
  20.   out   dx,al
  21.   shr   eax,8
  22.   inc   edx
  23.   out   dx,al
  24.   shr   eax,8
  25.   inc   edx
  26.   out   dx,al
  27.   shr   eax,8
  28.   inc   edx
  29.   and   al,1+2+4+8
  30.   add   al,byte [hdid] ;+0 or +16
  31.   or    al,32+64+128
  32.   out   dx,al
  33.   inc   edx
  34.   mov   al,0x20
  35.   out   dx,al
  36.   sti
  37.  
  38.   call  wait_for_sector_buffer
  39.   cmp   [hd_error],0
  40.   jnz   hd_read_error
  41.   cli
  42.   push  edi
  43.   mov   edi,ebx
  44.   mov   ecx,256
  45.   mov   edx,[hdbase]
  46.   cld
  47.   rep   insw
  48.   pop   edi
  49.   sti
  50.   pop   edx
  51.   pop   eax
  52.   ret
  53.  
  54. hd_phys_write:
  55. ;eax - sector number
  56. ;ebx - destination
  57.   cmp   eax,[partition_start]
  58.   jb    .ret
  59.   cmp   eax,[partition_end]
  60.   ja    .ret
  61.   pushad
  62.   call  wait_for_hd_idle
  63.   popad
  64.   push  edx
  65.   push  eax
  66.   cli
  67.   xor   eax,eax
  68.   mov   edx,[hdbase]
  69.   inc   edx
  70.   out   dx,al
  71.   inc   edx
  72.   inc   eax
  73.   out   dx,al
  74. ;write sector number  
  75.   inc   edx
  76.   mov   eax,[esp]
  77.   out   dx,al
  78.   shr   eax,8
  79.   inc   edx
  80.   out   dx,al
  81.   shr   eax,8
  82.   inc   edx
  83.   out   dx,al
  84.   shr   eax,8
  85.   inc   edx
  86.   and   al,1+2+4+8
  87.   add   al,byte [hdid] ;+0 or +16
  88.   or    al,32+64+128
  89.   out   dx,al
  90.  
  91.   inc   edx
  92.   mov   al,0x30
  93.   out   dx,al
  94.   sti
  95.  
  96.   call  wait_for_sector_buffer
  97.   cmp   [hd_error],0
  98.   jnz   hd_write_error
  99.   cli
  100.   push  esi
  101.   mov   esi,ebx
  102.   mov   ecx,256
  103.   mov   edx,[hdbase]
  104.   cld
  105.   rep   outsw
  106.   pop   esi
  107.   sti
  108.   pop   edx
  109.   pop   eax
  110. .ret:  
  111.   ret