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core, fix z80 irq handling, reset defaults (cz80, drz80)

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This commit is contained in:
kub 2024-02-22 21:01:37 +01:00
parent bfe516c3a9
commit ad43165afc
6 changed files with 35 additions and 40 deletions
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35
cpu/cz80/cz80_opED.c
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@ -407,29 +407,14 @@ OP_SBC16:
RET(8)
/*-----------------------------------------
RETN
RETI/RETN
-----------------------------------------*/
OPED(0x45): // RETN;
OPED(0x55): // RETN;
OPED(0x65): // RETN;
OPED(0x75): // RETN;
POP_16(res);
SET_PC(res);
if (!zIFF1 && zIFF2)
{
zIFF1 = (1 << 2);
if (CPU->IRQState)
{
CPU->Status |= CZ80_HAS_INT;
}
}
else zIFF1 = zIFF2;
RET(10)
/*-----------------------------------------
RETI
-----------------------------------------*/
// works the same, but Z80 PIO can detect the opcode
OPED(0x45): // RETN
OPED(0x55): // RETN
OPED(0x65): // RETN
OPED(0x75): // RETN
OPED(0x4d): // RETI
OPED(0x5d): // RETI
@ -437,6 +422,14 @@ OP_SBC16:
OPED(0x7d): // RETI
POP_16(res);
SET_PC(res);
if (!zIFF1 && zIFF2)
{
if (CPU->IRQState)
{
CPU->Status |= CZ80_HAS_INT;
}
}
zIFF1 = zIFF2;
RET(10)
/*-----------------------------------------