2 * Interrupt vectors emulation
4 * Copyright 1995 Alexandre Julliard
14 #include "stackframe.h"
18 static FARPROC16 INT_Vectors[256];
20 /* Ordinal number for interrupt 0 handler in WPROCS.DLL */
21 #define FIRST_INTERRUPT_ORDINAL 100
24 /**********************************************************************
30 HMODULE16 hModule = GetModuleHandle( "WPROCS" );
32 for (vector = 0; vector < 256; vector++)
34 if (!(INT_Vectors[vector] = MODULE_GetEntryPoint( hModule,
35 FIRST_INTERRUPT_ORDINAL+vector )))
37 fprintf(stderr,"Internal error: no vector for int %02x\n",vector);
45 /**********************************************************************
48 * Return the interrupt vector for a given interrupt.
50 FARPROC16 INT_GetHandler( BYTE intnum )
52 return INT_Vectors[intnum];
56 /**********************************************************************
59 * Set the interrupt handler for a given interrupt.
61 void INT_SetHandler( BYTE intnum, FARPROC16 handler )
63 dprintf_int( stddeb, "Set interrupt vector %02x <- %04x:%04x\n",
64 intnum, HIWORD(handler), LOWORD(handler) );
65 INT_Vectors[intnum] = handler;
69 /**********************************************************************
72 void INT_DummyHandler( SIGCONTEXT *context )
75 STACK16FRAME *frame = CURRENT_STACK16;
76 BUILTIN_GetEntryPoint16( frame->entry_cs, frame->entry_ip, &ordinal );
77 INT_BARF( context, ordinal - FIRST_INTERRUPT_ORDINAL );
81 /**********************************************************************
84 * Handler for int 11h (get equipment list).
86 void INT_Int11Handler( SIGCONTEXT *context )
89 int parallelports = 0;
93 /* borrowed from Ralph Brown's interrupt lists
95 bits 15-14: number of parallel devices
96 bit 13: [Conv] Internal modem
98 bits 11- 9: number of serial devices
100 bits 7- 6: number of diskette drives minus one
101 bits 5- 4: Initial video mode:
107 bit 2: [PS] =1 if pointing device
109 bit 1: =1 if math co-processor
110 bit 0: =1 if diskette available for boot
112 /* Currently the only of these bits correctly set are:
113 bits 15-14 } Added by William Owen Smith,
114 bits 11-9 } wos@dcs.warwick.ac.uk
119 if (DRIVE_IsValid(0)) diskdrives++;
120 if (DRIVE_IsValid(1)) diskdrives++;
121 if (diskdrives) diskdrives--;
123 for (x=0; x!=MAX_PORTS; x++)
125 if (COM[x].devicename)
127 if (LPT[x].devicename)
130 if (serialports > 7) /* 3 bits -- maximum value = 7 */
132 if (parallelports > 3) /* 2 bits -- maximum value = 3 */
135 AX_reg(context) = (diskdrives << 6) | (serialports << 9) |
136 (parallelports << 14) | 0x02;
140 /**********************************************************************
143 * Handler for int 12h (get memory size).
145 void INT_Int12Handler( SIGCONTEXT *context )
147 AX_reg(context) = 640;
151 /**********************************************************************
154 * Handler for int 15h.
156 void INT_Int15Handler( SIGCONTEXT *context )
158 INT_BARF( context, 0x15 );
162 /**********************************************************************
165 * Handler for int 16h (keyboard).
167 void INT_Int16Handler( SIGCONTEXT *context )
169 INT_BARF( context, 0x16 );