miscemu/int13.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "registers.h"
   4 #include "wine.h"
   5 #include "miscemu.h"
   6 #include "stddebug.h"
   7 /* #define DEBUG_INT */
   8 #include "debug.h"
   9
  10
  11 /**********************************************************************
  12  *          INT_Int13Handler
  13  *
  14  * Handler for int 13h (disk I/O).
  15  */
  16 void INT_Int13Handler( struct sigcontext_struct context )
  17 {
  18     switch(AH_reg(&context))
  19     {
  20         case 0x00:                            /* RESET DISK SYSTEM     */
  21         case 0x04:                            /* VERIFY DISK SECTOR(S) */
  22                 AH_reg(&context) = 0;
  23                 break;
  24
  25         case 0x05:                                     /* FORMAT TRACK */
  26                 AH_reg(&context) = 0x0c;
  27                 SET_CFLAG(&context);
  28                 break;
  29
  30         case 0x06:             /* FORMAT TRACK AND SET BAD SECTOR FLAGS */
  31         case 0x07:             /* FORMAT DRIVE STARTING AT GIVEN TRACK  */
  32                 AH_reg(&context) = 0x0c;
  33                 break;
  34
  35         case 0x08:                              /* GET DRIVE PARAMETERS  */
  36                 AH_reg(&context) = (DL_reg(&context) & 0x80) ? 0x07 : 0x01;
  37                 SET_CFLAG(&context);
  38                 break;
  39
  40         case 0x09:         /* INITIALIZE CONTROLLER WITH DRIVE PARAMETERS */
  41         case 0x0c:         /* SEEK TO CYLINDER                            */
  42         case 0x0d:         /* RESET HARD DISKS                            */
  43         case 0x10:         /* CHECK IF DRIVE READY                        */
  44         case 0x11:         /* RECALIBRATE DRIVE                           */
  45         case 0x14:         /* CONTROLLER INTERNAL DIAGNOSTIC              */
  46                 AH_reg(&context) = 0;
  47                 break;
  48
  49         case 0x0e:                    /* READ SECTOR BUFFER (XT only)      */
  50         case 0x0f:                    /* WRITE SECTOR BUFFER (XT only)     */
  51         case 0x12:                    /* CONTROLLER RAM DIAGNOSTIC (XT,PS) */
  52         case 0x13:                    /* DRIVE DIAGNOSTIC (XT,PS)          */
  53                 AH_reg(&context) = 0x01;
  54                 SET_CFLAG(&context);
  55                 break;
  56
  57         default:
  58                 INT_BARF( &context, 0x13 );
  59     }
  60 }