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z80 timing change

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@84 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-31 17:25:48 +00:00
parent 2433f40912
commit d915372968
6 changed files with 32 additions and 15 deletions
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13
Pico/MemoryCmn.c
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@ -149,16 +149,21 @@ void OtherWrite8(u32 a,u32 d,int realsize)
return;
}
if (a==0xa11100) {
extern int z80startCycle, z80stopCycle;
//int lineCycles=(488-SekCyclesLeft)&0x1ff;
d&=1; d^=1;
if(!d) {
// this is for a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)
if (Pico.m.z80Run) {
int lineCycles=(488-SekCyclesLeft)&0x1ff;
int lineCycles;
z80stopCycle = SekCyclesDone();
lineCycles=(lineCycles>>1)-(lineCycles>>5);
z80_run(lineCycles);
if (Pico.m.z80Run&2)
lineCycles=(488-SekCyclesLeft)&0x1ff;
else lineCycles=z80stopCycle-z80startCycle; // z80 was started at current line
if (lineCycles > 0 && lineCycles <= 488) {
dprintf("zrun: %i/%i cycles", lineCycles, (lineCycles>>1)-(lineCycles>>5));
lineCycles=(lineCycles>>1)-(lineCycles>>5);
z80_run(lineCycles);
}
}
} else {
z80startCycle = SekCyclesDone();