Sweden-Number/msdos/interrupts.c

135 lines
3.4 KiB
C

/*
* Interrupt vectors emulation
*
* Copyright 1995 Alexandre Julliard
*/
#include <sys/types.h>
#include "windows.h"
#include "drive.h"
#include "miscemu.h"
#include "msdos.h"
#include "module.h"
#include "stackframe.h"
#include "debug.h"
static FARPROC16 INT_Vectors[256];
/**********************************************************************
* INT_GetPMHandler
*
* Return the protected mode interrupt vector for a given interrupt.
*/
FARPROC16 INT_GetPMHandler( BYTE intnum )
{
return INT_Vectors[intnum];
}
/**********************************************************************
* INT_SetPMHandler
*
* Set the protected mode interrupt handler for a given interrupt.
*/
void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
{
TRACE(int, "Set protected mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
INT_Vectors[intnum] = handler;
}
/**********************************************************************
* INT_GetRMHandler
*
* Return the real mode interrupt vector for a given interrupt.
*/
FARPROC16 INT_GetRMHandler( BYTE intnum )
{
return ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum];
}
/**********************************************************************
* INT_SetRMHandler
*
* Set the real mode interrupt handler for a given interrupt.
*/
void INT_SetRMHandler( BYTE intnum, FARPROC16 handler )
{
TRACE(int, "Set real mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
((FARPROC16*)DOSMEM_MemoryBase(0))[intnum] = handler;
}
/**********************************************************************
* INT_CtxGetHandler
*
* Return the interrupt vector for a given interrupt.
*/
FARPROC16 INT_CtxGetHandler( CONTEXT *context, BYTE intnum )
{
if (ISV86(context))
return ((FARPROC16*)V86BASE(context))[intnum];
else
return INT_GetPMHandler(intnum);
}
/**********************************************************************
* INT_CtxSetHandler
*
* Set the interrupt handler for a given interrupt.
*/
void INT_CtxSetHandler( CONTEXT *context, BYTE intnum, FARPROC16 handler )
{
if (ISV86(context)) {
TRACE(int, "Set real mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
((FARPROC16*)V86BASE(context))[intnum] = handler;
} else
INT_SetPMHandler(intnum, handler);
}
/**********************************************************************
* INT_RealModeInterrupt
*
* Handle real mode interrupts
*/
int INT_RealModeInterrupt( BYTE intnum, PCONTEXT context )
{
/* we should really map to if1632/wprocs.spec, but not all
* interrupt handlers are adapted to support real mode yet */
switch (intnum) {
case 0x10:
INT_Int10Handler(context);
break;
case 0x1a:
INT_Int1aHandler(context);
break;
case 0x20:
INT_Int20Handler(context);
break;
case 0x21:
DOS3Call(context);
break;
case 0x25:
INT_Int25Handler(context);
break;
case 0x2f:
INT_Int2fHandler(context);
break;
case 0x31:
INT_Int31Handler(context);
break;
default:
FIXME(int, "Unknown Interrupt in DOS mode: 0x%x\n", intnum);
return 1;
}
return 0;
}