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deco_irq: trigger interrupts at the start of hblank instead of at the 1st active pixel (nw)

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This commit is contained in:
hap 2018-11-22 17:05:29 +01:00
parent 3f2f495333
commit ab95800cad
1 changed files with 3 additions and 3 deletions
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6
src/mame/machine/deco_irq.cpp
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@ -63,7 +63,7 @@ void deco_irq_device::device_start()
// allocate scanline timer and start it
m_scanline_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(deco_irq_device::scanline_callback), this));
m_scanline_timer->adjust(m_screen->time_until_pos(0));
m_scanline_timer->adjust(m_screen->time_until_pos(0, m_screen->visible_area().right() + 1));
// register for save states
save_item(NAME(m_lightgun_irq));
@ -115,14 +115,14 @@ TIMER_CALLBACK_MEMBER( deco_irq_device::scanline_callback )
}
// vblank-in?
if (y == (visible.bottom() + 1))
if (y == visible.bottom())
{
m_vblank_irq = true;
m_vblank_irq_cb(ASSERT_LINE);
}
// wait for next line
m_scanline_timer->adjust(m_screen->time_until_pos(y + 1));
m_scanline_timer->adjust(m_screen->time_until_pos(y + 1), visible.right() + 1);
}