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cz80, improve cycle accounting

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This commit is contained in:
kub 2020-12-14 21:06:24 +01:00
parent e0d5c83fd3
commit 85894ad406
4 changed files with 46 additions and 45 deletions
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16
cpu/cz80/cz80.c
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@ -275,23 +275,22 @@ Cz80_Check_Interrupt:
if (CPU->IRQState != CLEAR_LINE)
{
CHECK_INT
CPU->ICount -= CPU->ExtraCycles;
CPU->ExtraCycles = 0;
}
CPU->ICount -= CPU->ExtraCycles;
CPU->ExtraCycles = 0;
if (!CPU->HaltState)
goto Cz80_Exec;
}
}
else CPU->ICount = 0;
Cz80_Exec_End:
CPU->PC = PC;
#if CZ80_ENCRYPTED_ROM
CPU->OPBase = OPBase;
#endif
if (CPU->HaltState)
CPU->ICount = 0;
cycles -= CPU->ICount;
if (!(CPU->HaltState && CPU->ICount > 0))
cycles -= CPU->ICount;
CPU->ICount = 0;
#if !CZ80_EMULATE_R_EXACTLY
zR = (zR + (cycles >> 2)) & 0x7f;
#endif
@ -333,6 +332,11 @@ void Cz80_Set_IRQ(cz80_struc *CPU, INT32 line, INT32 state)
#endif
}
}
if (CPU->ICount > 0)
{
CPU->ICount -= CPU->ExtraCycles;
CPU->ExtraCycles = 0;
}
}