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72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* DOS interrupt 09h handler (IRQ1 - KEYBOARD)
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*/
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#include <stdlib.h>
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#include "winuser.h"
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#include "miscemu.h"
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#include "input.h"
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#include "debug.h"
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#include "dosexe.h"
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typedef struct {
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BYTE queuelen,queue[15];
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} KBDSYSTEM;
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/**********************************************************************
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* INT_Int09Handler
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*
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* Handler for int 09h.
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*/
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void WINAPI INT_Int09Handler( CONTEXT *context )
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{
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BYTE scan = INT_Int09ReadScan();
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UINT vkey = MapVirtualKeyA(scan&0x7f, 1);
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BYTE ch[2];
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int cnt;
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if (!(scan & 0x80)) {
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/* as in TranslateMessage, windows/input.c */
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cnt = ToAscii(vkey, scan&0x7f, QueueKeyStateTable, (LPWORD)ch, 0);
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if (cnt==1) {
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FIXME(int,"enter character %c into console input, not implemented\n",ch[0]);
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}
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}
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DOSVM_PIC_ioport_out(0x20, 0x20); /* send EOI */
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}
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static void KbdRelay( LPDOSTASK lpDosTask, PCONTEXT context, void *data )
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{
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KBDSYSTEM *sys = (KBDSYSTEM *)DOSVM_GetSystemData(0x09);
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if (sys && sys->queuelen) {
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/* cleanup operation, called from DOSVM_PIC_ioport_out:
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* we'll remove current scancode from keyboard buffer here,
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* rather than in ReadScan, because some DOS apps depend on
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* the scancode being available for reading multiple times... */
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if (--sys->queuelen)
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memmove(sys->queue,sys->queue+1,sys->queuelen);
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}
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}
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void WINAPI INT_Int09SendScan( BYTE scan )
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{
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KBDSYSTEM *sys = (KBDSYSTEM *)DOSVM_GetSystemData(0x09);
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if (!sys) {
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sys = calloc(1,sizeof(KBDSYSTEM));
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DOSVM_SetSystemData(0x09,sys);
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}
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/* add scancode to queue */
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sys->queue[sys->queuelen++] = scan;
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/* tell app to read it by triggering IRQ 1 (int 09) */
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DOSVM_QueueEvent(1,DOS_PRIORITY_KEYBOARD,KbdRelay,NULL);
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}
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BYTE WINAPI INT_Int09ReadScan( void )
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{
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KBDSYSTEM *sys = (KBDSYSTEM *)DOSVM_GetSystemData(0x09);
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if (sys)
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return sys->queue[0];
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else
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return 0;
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}
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