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pic8259 - Fixed edge triggering and non-specific EOI [Carl, Miodrag Milanovic]

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This commit is contained in:
Miodrag Milanovic 2011-06-01 10:39:43 +00:00
parent d966fe3e0d
commit e32cd1f5ec
1 changed files with 9 additions and 2 deletions
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11
src/emu/machine/pic8259.c
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@ -47,6 +47,7 @@ struct pic8259
UINT8 irr;
UINT8 prio;
UINT8 imr;
UINT8 irq_lines;
UINT8 input;
UINT8 ocw3;
@ -124,6 +125,7 @@ INLINE void pic8259_set_timer(pic8259_t *pic8259)
static void pic8259_set_irq_line(device_t *device, int irq, int state)
{
pic8259_t *pic8259 = get_safe_token(device);
UINT8 mask = (1 << irq);
if (state)
{
@ -131,7 +133,9 @@ static void pic8259_set_irq_line(device_t *device, int irq, int state)
if (LOG_GENERAL)
logerror("pic8259_set_irq_line(): PIC set IRQ line #%d\n", irq);
pic8259->irr |= 1 << irq;
if(pic8259->level_trig_mode || (!pic8259->level_trig_mode && !(pic8259->irq_lines & mask)))
pic8259->irr |= mask;
pic8259->irq_lines |= mask;
}
else
{
@ -139,7 +143,8 @@ static void pic8259_set_irq_line(device_t *device, int irq, int state)
if (LOG_GENERAL)
logerror("pic8259_set_irq_line(): PIC cleared IRQ line #%d\n", irq);
pic8259->irr &= ~(1 << irq);
pic8259->irq_lines &= ~mask;
pic8259->irr &= ~mask;
}
pic8259_set_timer(pic8259);
@ -304,6 +309,7 @@ WRITE8_DEVICE_HANDLER( pic8259_w )
if (pic8259->isr & mask)
{
pic8259->isr &= ~mask;
pic8259->irr &= ~mask;
break;
}
}
@ -423,6 +429,7 @@ static DEVICE_RESET( pic8259 ) {
pic8259->state = STATE_READY;
pic8259->isr = 0;
pic8259->irr = 0;
pic8259->irq_lines = 0;
pic8259->prio = 0;
pic8259->imr = 0;
pic8259->input = 0;