miscemu/interrupts.c

   1 /*
   2  * Interrupt vectors emulation
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include "windows.h"
   8 #include "miscemu.h"
   9 #include "dos_fs.h"
  10 #include "module.h"
  11 #include "registers.h"
  12 #include "stackframe.h"
  13 #include "stddebug.h"
  14 #include "debug.h"
  15
  16 static SEGPTR INT_Vectors[256];
  17
  18   /* Ordinal number for interrupt 0 handler in WINPROCS.DLL */
  19 #define FIRST_INTERRUPT_ORDINAL 100
  20
  21
  22 /**********************************************************************
  23  *          INT_Init
  24  */
  25 BOOL INT_Init(void)
  26 {
  27     WORD vector;
  28     HMODULE hModule = GetModuleHandle( "WINPROCS" );
  29
  30     for (vector = 0; vector < 256; vector++)
  31     {
  32         if (!(INT_Vectors[vector] = MODULE_GetEntryPoint( hModule,
  33                                              FIRST_INTERRUPT_ORDINAL+vector )))
  34         {
  35             fprintf(stderr,"Internal error: no vector for int %02x\n",vector);
  36             return FALSE;
  37         }
  38     }
  39     return TRUE;
  40 }
  41
  42
  43 /**********************************************************************
  44  *          INT_GetHandler
  45  *
  46  * Return the interrupt vector for a given interrupt.
  47  */
  48 SEGPTR INT_GetHandler( BYTE intnum )
  49 {
  50     return INT_Vectors[intnum];
  51 }
  52
  53
  54 /**********************************************************************
  55  *          INT_SetHandler
  56  *
  57  * Set the interrupt handler for a given interrupt.
  58  */
  59 void INT_SetHandler( BYTE intnum, SEGPTR handler )
  60 {
  61     dprintf_int( stddeb, "Set interrupt vector %02x <- %04x:%04x\n",
  62                  intnum, HIWORD(handler), LOWORD(handler) );
  63     INT_Vectors[intnum] = handler;
  64 }
  65
  66
  67 /**********************************************************************
  68  *          INT_DummyHandler
  69  */
  70 void INT_DummyHandler( struct sigcontext_struct context )
  71 {
  72     INT_BARF( &context,
  73               CURRENT_STACK16->ordinal_number - FIRST_INTERRUPT_ORDINAL );
  74 }
  75
  76
  77 /**********************************************************************
  78  *          INT_Int11Handler
  79  *
  80  * Handler for int 11h (get equipment list).
  81  */
  82 void INT_Int11Handler( struct sigcontext_struct context )
  83 {
  84     AX_reg(&context) = DOS_GetEquipment();
  85 }
  86
  87
  88 /**********************************************************************
  89  *          INT_Int12Handler
  90  *
  91  * Handler for int 12h (get memory size).
  92  */
  93 void INT_Int12Handler( struct sigcontext_struct context )
  94 {
  95     AX_reg(&context) = 640;
  96 }
  97
  98
  99 /**********************************************************************
 100  *          INT_Int15Handler
 101  *
 102  * Handler for int 15h.
 103  */
 104 void INT_Int15Handler( struct sigcontext_struct context )
 105 {
 106     INT_BARF( &context, 0x15 );
 107 }
 108
 109
 110 /**********************************************************************
 111  *          INT_Int16Handler
 112  *
 113  * Handler for int 16h (keyboard).
 114  */
 115 void INT_Int16Handler( struct sigcontext_struct context )
 116 {
 117     INT_BARF( &context, 0x16 );
 118 }