2 * Interrupt vectors emulation
4 * Copyright 1995 Alexandre Julliard
14 #include "registers.h"
15 #include "stackframe.h"
19 static SEGPTR INT_Vectors[256];
21 /* Ordinal number for interrupt 0 handler in WINPROCS.DLL */
22 #define FIRST_INTERRUPT_ORDINAL 100
25 /**********************************************************************
31 HMODULE hModule = GetModuleHandle( "WINPROCS" );
33 for (vector = 0; vector < 256; vector++)
35 if (!(INT_Vectors[vector] = MODULE_GetEntryPoint( hModule,
36 FIRST_INTERRUPT_ORDINAL+vector )))
38 fprintf(stderr,"Internal error: no vector for int %02x\n",vector);
46 /**********************************************************************
49 * Return the interrupt vector for a given interrupt.
51 SEGPTR INT_GetHandler( BYTE intnum )
53 return INT_Vectors[intnum];
57 /**********************************************************************
60 * Set the interrupt handler for a given interrupt.
62 void INT_SetHandler( BYTE intnum, SEGPTR handler )
64 dprintf_int( stddeb, "Set interrupt vector %02x <- %04x:%04x\n",
65 intnum, HIWORD(handler), LOWORD(handler) );
66 INT_Vectors[intnum] = handler;
70 /**********************************************************************
73 void INT_DummyHandler( struct sigcontext_struct context )
76 CURRENT_STACK16->ordinal_number - FIRST_INTERRUPT_ORDINAL );
80 /**********************************************************************
83 * Handler for int 11h (get equipment list).
85 void INT_Int11Handler( struct sigcontext_struct context )
88 int parallelports = 0;
92 /* borrowed from Ralph Brown's interrupt lists
94 bits 15-14: number of parallel devices
95 bit 13: [Conv] Internal modem
97 bits 11- 9: number of serial devices
99 bits 7- 6: number of diskette drives minus one
100 bits 5- 4: Initial video mode:
106 bit 2: [PS] =1 if pointing device
108 bit 1: =1 if math co-processor
109 bit 0: =1 if diskette available for boot
111 /* Currently the only of these bits correctly set are:
112 bits 15-14 } Added by William Owen Smith,
113 bits 11-9 } wos@dcs.warwick.ac.uk
118 if (DRIVE_IsValid(0)) diskdrives++;
119 if (DRIVE_IsValid(1)) diskdrives++;
120 if (diskdrives) diskdrives--;
122 for (x=0; x!=MAX_PORTS; x++)
124 if (COM[x].devicename)
126 if (LPT[x].devicename)
129 if (serialports > 7) /* 3 bits -- maximum value = 7 */
131 if (parallelports > 3) /* 2 bits -- maximum value = 3 */
134 AX_reg(&context) = (diskdrives << 6) | (serialports << 9) |
135 (parallelports << 14) | 0x02;
139 /**********************************************************************
142 * Handler for int 12h (get memory size).
144 void INT_Int12Handler( struct sigcontext_struct context )
146 AX_reg(&context) = 640;
150 /**********************************************************************
153 * Handler for int 15h.
155 void INT_Int15Handler( struct sigcontext_struct context )
157 INT_BARF( &context, 0x15 );
161 /**********************************************************************
164 * Handler for int 16h (keyboard).
166 void INT_Int16Handler( struct sigcontext_struct context )
168 INT_BARF( &context, 0x16 );