59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "miscemu.h"
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#include "stddebug.h"
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/* #define DEBUG_INT */
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#include "debug.h"
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/**********************************************************************
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* INT_Int13Handler
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*
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* Handler for int 13h (disk I/O).
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*/
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void INT_Int13Handler( SIGCONTEXT *context )
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{
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switch(AH_reg(context))
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{
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case 0x00: /* RESET DISK SYSTEM */
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case 0x04: /* VERIFY DISK SECTOR(S) */
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AH_reg(context) = 0;
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break;
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case 0x05: /* FORMAT TRACK */
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AH_reg(context) = 0x0c;
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SET_CFLAG(context);
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break;
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case 0x06: /* FORMAT TRACK AND SET BAD SECTOR FLAGS */
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case 0x07: /* FORMAT DRIVE STARTING AT GIVEN TRACK */
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AH_reg(context) = 0x0c;
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break;
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case 0x08: /* GET DRIVE PARAMETERS */
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AH_reg(context) = (DL_reg(context) & 0x80) ? 0x07 : 0x01;
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SET_CFLAG(context);
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break;
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case 0x09: /* INITIALIZE CONTROLLER WITH DRIVE PARAMETERS */
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case 0x0c: /* SEEK TO CYLINDER */
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case 0x0d: /* RESET HARD DISKS */
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case 0x10: /* CHECK IF DRIVE READY */
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case 0x11: /* RECALIBRATE DRIVE */
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case 0x14: /* CONTROLLER INTERNAL DIAGNOSTIC */
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AH_reg(context) = 0;
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break;
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case 0x0e: /* READ SECTOR BUFFER (XT only) */
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case 0x0f: /* WRITE SECTOR BUFFER (XT only) */
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case 0x12: /* CONTROLLER RAM DIAGNOSTIC (XT,PS) */
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case 0x13: /* DRIVE DIAGNOSTIC (XT,PS) */
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AH_reg(context) = 0x01;
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SET_CFLAG(context);
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break;
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default:
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INT_BARF( context, 0x13 );
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}
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}
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