Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-25 09:50:04 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

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

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/devices/machine/spg2xx.cpp
View File

@ -965,12 +965,12 @@ WRITE_LINE_MEMBER(spg2xx_device::vblank)
}
#endif
const uint16_t old = VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS;
VIDEO_IRQ_STATUS |= 1;
LOGMASKED(LOG_IRQS, "Setting video IRQ status to %04x\n", VIDEO_IRQ_STATUS);
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS);
if (changed)
if (VIDEO_IRQ_ENABLE & 1)
{
VIDEO_IRQ_STATUS |= 1;
LOGMASKED(LOG_IRQS, "Setting video IRQ status to %04x\n", VIDEO_IRQ_STATUS);
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:
{
const uint16_t old = VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS;
VIDEO_IRQ_STATUS |= 2;
const uint16_t changed = old ^ (VIDEO_IRQ_ENABLE & VIDEO_IRQ_STATUS);
if (changed)
if (VIDEO_IRQ_ENABLE & 2)
{
VIDEO_IRQ_STATUS |= 2;
check_video_irq();
}
m_screen->update_partial(m_screen->vpos());