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correction: irq is on falling edge

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This commit is contained in:
Michaël Banaan Ananas 2011-11-27 01:05:47 +00:00
parent 5b1aa2f2a2
commit 3f98739582
1 changed files with 1 additions and 1 deletions
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2
src/emu/cpu/mb88xx/mb88xx.c
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@ -247,7 +247,7 @@ static int pla( mb88_state *cpustate, int inA, int inB )
static void set_irq_line(mb88_state *cpustate, int state)
{
/* on falling edge trigger interrupt */
if ( (cpustate->pio & 0x04) && state != CLEAR_LINE )
if ( (cpustate->pio & 0x04) && cpustate->nf && state == CLEAR_LINE )
{
cpustate->pending_interrupt |= INT_CAUSE_EXTERNAL;
}