173 lines
4.1 KiB
C
173 lines
4.1 KiB
C
/*
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* Interrupt vectors emulation
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*
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* Copyright 1995 Alexandre Julliard
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*/
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#include <sys/types.h>
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#include "windows.h"
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#include "drive.h"
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#include "miscemu.h"
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#include "msdos.h"
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#include "module.h"
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#include "registers.h"
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#include "stackframe.h"
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#include "stddebug.h"
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#include "debug.h"
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static SEGPTR INT_Vectors[256];
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/* Ordinal number for interrupt 0 handler in WPROCS.DLL */
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#define FIRST_INTERRUPT_ORDINAL 100
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/**********************************************************************
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* INT_Init
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*/
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BOOL INT_Init(void)
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{
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WORD vector;
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HMODULE hModule = GetModuleHandle( "WPROCS" );
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for (vector = 0; vector < 256; vector++)
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{
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if (!(INT_Vectors[vector] = MODULE_GetEntryPoint( hModule,
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FIRST_INTERRUPT_ORDINAL+vector )))
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{
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fprintf(stderr,"Internal error: no vector for int %02x\n",vector);
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return FALSE;
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}
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}
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return TRUE;
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}
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/**********************************************************************
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* INT_GetHandler
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*
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* Return the interrupt vector for a given interrupt.
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*/
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SEGPTR INT_GetHandler( BYTE intnum )
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{
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return INT_Vectors[intnum];
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}
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/**********************************************************************
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* INT_SetHandler
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*
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* Set the interrupt handler for a given interrupt.
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*/
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void INT_SetHandler( BYTE intnum, SEGPTR handler )
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{
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dprintf_int( stddeb, "Set interrupt vector %02x <- %04x:%04x\n",
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intnum, HIWORD(handler), LOWORD(handler) );
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INT_Vectors[intnum] = handler;
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}
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/**********************************************************************
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* INT_DummyHandler
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*/
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void INT_DummyHandler( struct sigcontext_struct context )
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{
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WORD ordinal;
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char *name;
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STACK16FRAME *frame = CURRENT_STACK16;
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BUILTIN_GetEntryPoint( frame->entry_cs, frame->entry_ip, &ordinal, &name );
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INT_BARF( &context, ordinal - FIRST_INTERRUPT_ORDINAL );
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}
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/**********************************************************************
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* INT_Int11Handler
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*
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* Handler for int 11h (get equipment list).
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*/
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void INT_Int11Handler( struct sigcontext_struct context )
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{
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int diskdrives = 0;
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int parallelports = 0;
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int serialports = 0;
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int x;
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/* borrowed from Ralph Brown's interrupt lists
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bits 15-14: number of parallel devices
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bit 13: [Conv] Internal modem
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bit 12: reserved
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bits 11- 9: number of serial devices
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bit 8: reserved
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bits 7- 6: number of diskette drives minus one
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bits 5- 4: Initial video mode:
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00b = EGA,VGA,PGA
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01b = 40 x 25 color
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10b = 80 x 25 color
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11b = 80 x 25 mono
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bit 3: reserved
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bit 2: [PS] =1 if pointing device
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[non-PS] reserved
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bit 1: =1 if math co-processor
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bit 0: =1 if diskette available for boot
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*/
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/* Currently the only of these bits correctly set are:
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bits 15-14 } Added by William Owen Smith,
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bits 11-9 } wos@dcs.warwick.ac.uk
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bits 7-6
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bit 2 (always set)
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*/
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if (DRIVE_IsValid(0)) diskdrives++;
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if (DRIVE_IsValid(1)) diskdrives++;
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if (diskdrives) diskdrives--;
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for (x=0; x!=MAX_PORTS; x++)
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{
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if (COM[x].devicename)
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serialports++;
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if (LPT[x].devicename)
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parallelports++;
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}
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if (serialports > 7) /* 3 bits -- maximum value = 7 */
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serialports=7;
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if (parallelports > 3) /* 2 bits -- maximum value = 3 */
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parallelports=3;
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AX_reg(&context) = (diskdrives << 6) | (serialports << 9) |
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(parallelports << 14) | 0x02;
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}
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/**********************************************************************
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* INT_Int12Handler
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*
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* Handler for int 12h (get memory size).
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*/
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void INT_Int12Handler( struct sigcontext_struct context )
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{
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AX_reg(&context) = 640;
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}
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/**********************************************************************
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* INT_Int15Handler
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*
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* Handler for int 15h.
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*/
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void INT_Int15Handler( struct sigcontext_struct context )
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{
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INT_BARF( &context, 0x15 );
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}
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/**********************************************************************
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* INT_Int16Handler
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*
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* Handler for int 16h (keyboard).
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*/
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void INT_Int16Handler( struct sigcontext_struct context )
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{
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INT_BARF( &context, 0x16 );
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}
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