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Add beta2 patch: add rtc irq acknowledging (fixes Fury)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2743
This commit is contained in:
Sebastian Strohhäcker 2007-01-09 18:24:50 +00:00
parent d3f72c5938
commit d6037bb2fe
1 changed files with 7 additions and 1 deletions
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8
src/hardware/cmos.cpp
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@ -35,6 +35,7 @@ static struct {
bool enabled;
Bit8u div;
float delay;
bool acknowledged;
} timer;
struct {
double timer;
@ -45,7 +46,10 @@ static struct {
} cmos;
static void cmos_timerevent(Bitu val) {
PIC_ActivateIRQ(8);
if (cmos.timer.acknowledged) {
cmos.timer.acknowledged=false;
PIC_ActivateIRQ(8);
}
if (cmos.timer.enabled) {
PIC_AddEvent(cmos_timerevent,cmos.timer.delay);
cmos.regs[0xc] = 0xC0;//Contraption Zack (music)
@ -155,6 +159,7 @@ static Bitu cmos_readreg(Bitu port,Bitu iolen) {
return (cmos.regs[0x0a]&0x7f);
}
case 0x0c: /* Status register C */
cmos.timer.acknowledged=true;
if (cmos.timer.enabled) {
/* In periodic interrupt mode only care for those flags */
Bit8u val=cmos.regs[0xc];
@ -286,6 +291,7 @@ public:
WriteHandler[1].Install(0x71,cmos_writereg,IO_MB);
ReadHandler[0].Install(0x71,cmos_readreg,IO_MB);
cmos.timer.enabled=false;
cmos.timer.acknowledged=true;
cmos.reg=0xa;
cmos_writereg(0x71,0x26,1);
cmos.reg=0xb;