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Fix to microsecond wait function.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@907
This commit is contained in:
Sjoerd van der Berg 2003-04-13 18:24:08 +00:00
parent 72e09d2827
commit 4ce762ab9a
1 changed files with 10 additions and 5 deletions
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15
src/ints/bios.cpp
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@ -169,11 +169,16 @@ static Bitu INT15_Handler(void) {
CALLBACK_SCF(true);
break;
case 0x83: /* BIOS - SET EVENT WAIT INTERVAL */
mem_writed(BIOS_WAIT_FLAG_POINTER,RealMake(SegValue(es),reg_bx));
mem_writed(BIOS_WAIT_FLAG_COUNT,reg_cx<<16|reg_dx);
mem_writeb(BIOS_WAIT_FLAG_ACTIVE,1);
PIC_RemoveEvents(&WaitFlagEvent);
PIC_AddEvent(&WaitFlagEvent,reg_cx<<16|reg_dx);
{
if (mem_readb(BIOS_WAIT_FLAG_ACTIVE)) break;
Bit32s count=(reg_cx<<16)|reg_dx;
if (count<1000) count=1000;
mem_writed(BIOS_WAIT_FLAG_POINTER,RealMake(SegValue(es),reg_bx));
mem_writed(BIOS_WAIT_FLAG_COUNT,count);
mem_writeb(BIOS_WAIT_FLAG_ACTIVE,1);
PIC_RemoveEvents(&WaitFlagEvent);
PIC_AddEvent(&WaitFlagEvent,count);
}
break;
case 0x84: /* BIOS - JOYSTICK SUPPORT (XT after 11/8/82,AT,XT286,PS) */
if (reg_dx==0x0000) {