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 );