miscemu/int26.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "registers.h"
   4 #include "msdos.h"
   5 #include "ldt.h"
   6 #include "wine.h"
   7 #include "miscemu.h"
   8 #include "dos_fs.h"
   9 #include "stddebug.h"
  10 /* #define DEBUG_INT */
  11 #include "debug.h"
  12
  13 int do_int26(struct sigcontext_struct *context)
  14 {
  15         BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS, BX);
  16         DWORD begin, length;
  17
  18         if(!DOS_ValidDrive(AL))
  19         {
  20             SetCflag;
  21             AX = 0x0101;        /* unknown unit */
  22
  23             /* push flags on stack */
  24             SP -= sizeof(WORD);
  25             setword(PTR_SEG_OFF_TO_LIN(SS,SP), (WORD) EFL);
  26             return 1;
  27         }
  28
  29         if (CX == 0xffff) {
  30                 begin = getdword(dataptr);
  31                 length = getword(&dataptr[4]);
  32                 dataptr = (BYTE *) PTR_SEG_TO_LIN(getdword(&dataptr[6]));
  33
  34         } else {
  35                 begin = DX;
  36                 length = CX;
  37         }
  38
  39         dprintf_int(stdnimp,"int26: abs diskwrite, drive %d, sector %ld, "
  40         "count %ld, buffer %d\n", (int)EAX & 0xff, begin, length, (int) dataptr);
  41
  42         ResetCflag;
  43
  44         /* push flags on stack */
  45         SP -= sizeof(WORD);
  46         setword(PTR_SEG_OFF_TO_LIN(SS,SP), (WORD) EFL);
  47
  48         return 1;
  49 }