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-spg2xx: Suppress video IRQ status bits when the corresponding enable bit is unset. Fixes vsmile fred and appilote. [Ryan Holtz]

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This commit is contained in:
MooglyGuy 2019-01-15 16:26:55 +01:00
parent 9d43733aa5
commit 2ead3aa7a8
1 changed files with 7 additions and 9 deletions
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16
src/devices/machine/spg2xx.cpp
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@ -965,12 +965,12 @@ WRITE_LINE_MEMBER(spg2xx_device::vblank)
} }
#endif #endif
const uint16_t old = VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS; if (VIDEO_IRQ_ENABLE & 1)
VIDEO_IRQ_STATUS |= 1; {
LOGMASKED(LOG_IRQS, "Setting video IRQ status to %04x\n", VIDEO_IRQ_STATUS); VIDEO_IRQ_STATUS |= 1;
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS); LOGMASKED(LOG_IRQS, "Setting video IRQ status to %04x\n", VIDEO_IRQ_STATUS);
if (changed)
check_video_irq(); check_video_irq();
}
} }
void spg2xx_device::check_video_irq() void spg2xx_device::check_video_irq()
@ -1869,11 +1869,9 @@ void spg2xx_device::device_timer(emu_timer &timer, device_timer_id id, int param
case TIMER_SCREENPOS: case TIMER_SCREENPOS:
{ {
const uint16_t old = VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS; if (VIDEO_IRQ_ENABLE & 2)
VIDEO_IRQ_STATUS |= 2;
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS);
if (changed)
{ {
VIDEO_IRQ_STATUS |= 2;
check_video_irq(); check_video_irq();
} }
m_screen->update_partial(m_screen->vpos()); m_screen->update_partial(m_screen->vpos());