compilers/linux86-0.16.17/libc/bios/bios_disk.c

   1
   2 #if !__FIRST_ARG_IN_AX__
   3 #ifdef __AS386_16__
   4
   5 #include <bios.h>
   6 #include <errno.h>
   7
   8 #ifdef L_bios_disk_rd
   9 _bios_disk_read(drive, cyl, head, sect, length, buffer)
  10 {
  11 #asm
  12   push  bp
  13   mov   bp,sp
  14
  15   push  es
  16   push  ds
  17   pop   es
  18
  19   mov   dl,[bp+2+__bios_disk_read.drive]
  20   mov   ch,[bp+2+__bios_disk_read.cyl]
  21   mov   dh,[bp+2+__bios_disk_read.head]
  22   mov   bx,[bp+2+__bios_disk_read.buffer]
  23
  24 #if 0
  25   mov   ax,[bp+2+__bios_disk_read.cyl]  ! Bits 10-11 of cylinder, AMI BIOS.
  26   mov   cl,#4
  27   sar   ax,cl
  28   and   al,#$C0
  29   xor   dh,al
  30 #endif
  31
  32   mov   cl,[bp+2+__bios_disk_read.sect]
  33   and   cl,#$3F
  34   mov   ax,[bp+2+__bios_disk_read.cyl]  ! Bits 8-9 of cylinder.
  35   sar   ax,#1
  36   sar   ax,#1
  37   and   al,#$C0
  38   or    cl,al
  39
  40   mov   al,[bp+2+__bios_disk_read.length]
  41   mov   ah,#$02
  42   int   $13
  43   jc    read_err1
  44   mov   ax,#0
  45 read_err1:
  46   xchg  ah,al
  47   xor   ah,ah
  48
  49   pop   es
  50   pop   bp
  51 #endasm
  52 }
  53 #endif
  54
  55 #ifdef L_bios_disk_wr
  56 _bios_disk_write(drive, cyl, head, sect, length, buffer)
  57 {
  58 #asm
  59   push  bp
  60   mov   bp,sp
  61
  62   push  es
  63   push  ds
  64   pop   es
  65
  66   mov   dl,[bp+2+__bios_disk_write.drive]
  67   mov   ch,[bp+2+__bios_disk_write.cyl]
  68   mov   dh,[bp+2+__bios_disk_write.head]
  69   mov   bx,[bp+2+__bios_disk_write.buffer]
  70
  71 #if 0
  72   mov   ax,[bp+2+__bios_disk_write.cyl] ! Bits 10-11 of cylinder, AMI BIOS.
  73   mov   cl,#4
  74   sar   ax,cl
  75   and   al,#$C0
  76   xor   dh,al
  77 #endif
  78
  79   mov   cl,[bp+2+__bios_disk_write.sect]
  80   and   cl,#$3F
  81   mov   ax,[bp+2+__bios_disk_write.cyl] ! Bits 8-9 of cylinder.
  82   sar   ax,#1
  83   sar   ax,#1
  84   and   al,#$C0
  85   or    cl,al
  86
  87   mov   al,[bp+2+__bios_disk_write.length]
  88   mov   ah,#$03
  89   int   $13
  90   jc    read_err2
  91   mov   ax,#0
  92 read_err2:
  93   xchg  ah,al
  94   xor   ah,ah
  95
  96   pop   es
  97   pop   bp
  98 #endasm
  99 }
 100 #endif
 101
 102 #ifdef L_bios_get_dpt
 103 long
 104 _bios_get_dpt(drive)
 105 {
 106 #asm
 107   push  bp
 108   mov   bp,sp
 109
 110   push  di
 111   push  es
 112
 113   mov   dl,[bp+2+__bios_get_dpt.drive]
 114
 115   mov   ah,#$08
 116   int   $13
 117   jnc   func_ok
 118   mov   cx,ax
 119   mov   dx,#-1
 120 func_ok:
 121   mov   ax,cx
 122
 123   pop   es
 124   pop   di
 125   pop   bp
 126 #endasm
 127 }
 128 #endif
 129
 130 #ifdef L_bios_disk_rs
 131 _bios_disk_reset(drive)
 132 {
 133 #asm
 134   push  bp
 135   mov   bp,sp
 136
 137   push  di
 138   push  es
 139
 140   mov   dl,[bp+2+__bios_disk_reset.drive]
 141
 142   mov   ah,#$08
 143   int   $13
 144   jnc   reset_ok
 145   mov   cx,ax
 146   mov   dx,#-1
 147 reset_ok:
 148   mov   ax,cx
 149
 150   pop   es
 151   pop   di
 152   pop   bp
 153 #endasm
 154 }
 155 #endif
 156
 157 #endif
 158 #endif