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EmuX86: IO improvements + hacky implementation of Timer IO port

This commit is contained in:
Luke Usher 2017-08-30 21:53:23 +01:00
parent 34df6d2865
commit fef9738f51
1 changed files with 15 additions and 3 deletions
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18
src/CxbxKrnl/EmuX86.cpp
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@ -60,19 +60,31 @@
uint32_t EmuX86_IORead32(xbaddr addr)
{
EmuWarning("EmuX86_IORead32(0x%08X) Not Implemented", addr);
switch (addr) {
case 0x8008: // TIMER
// HACK: This is very wrong.
// This timer should count at a specific frequency (3579.545 ticks per ms)
// But this is enough to keep NXDK from hanging for now.
LARGE_INTEGER performanceCount;
QueryPerformanceCounter(&performanceCount);
return performanceCount.QuadPart;
break;
}
EmuWarning("EmuX86_IORead32(0x%08X) [Unknown address]", addr);
return 0;
}
uint16_t EmuX86_IORead16(xbaddr addr)
{
EmuWarning("EmuX86_IORead16(0x%08X) Not Implemented", addr);
EmuWarning("EmuX86_IORead16(0x%08X) [Unknown address]", addr);
return 0;
}
uint8_t EmuX86_IORead8(xbaddr addr)
{
EmuWarning("EmuX86_IORead8(0x%08X) Not Implemented", addr);
EmuWarning("EmuX86_IORead8(0x%08X) [Unknown address]", addr);
return 0;
}