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nf flag (called IF in manuals) does _not_ block external irq, it just indicates that an one occured. This fixes some protection related issues in bosco.

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Michaël Banaan Ananas 2011-11-27 00:39:27 +00:00
parent c214ed0b54
commit 5b1aa2f2a2
1 changed files with 1 additions and 1 deletions
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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) && cpustate->nf == 0 && state != CLEAR_LINE )
if ( (cpustate->pio & 0x04) && state != CLEAR_LINE )
{
cpustate->pending_interrupt |= INT_CAUSE_EXTERNAL;
}