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x68k: if raster irq is on same line, trigger it immediately

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This commit is contained in:
cracyc 2021-05-14 13:44:57 -05:00
parent 57feb3faa1
commit c89891e4aa
1 changed files with 8 additions and 7 deletions
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15
src/mame/video/x68k_crtc.cpp
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@ -5,7 +5,7 @@
#include "video/x68k_crtc.h"
#include "screen.h"
//#define VERBOSE 0
//#define VERBOSE 1
#include "logmacro.h"
// device type definitions
@ -397,14 +397,15 @@ void x68k_crtc_device::crtc_w(offs_t offset, u16 data, u16 mem_mask)
case 9: // CRTC raster IRQ (GPIP6)
{
data = m_reg[9];
attotime irq_time = screen().time_until_pos((data) / m_vmultiple,2);
if (data != screen().vpos())
attotime irq_time = attotime::zero;
if ((data / m_vmultiple) != screen().vpos())
{
irq_time = screen().time_until_pos((data) / m_vmultiple,2);
m_rint_callback(1);
if (irq_time.as_double() > 0)
m_raster_irq_timer->adjust(irq_time, (data) / m_vmultiple);
}
m_raster_irq_timer->adjust(irq_time, (data) / m_vmultiple);
LOG("CRTC: Write to raster IRQ register - %i %i %f\n",data, screen().vpos(), irq_time.as_double());
}
LOG("CRTC: Write to raster IRQ register - %i\n",data);
break;
case 20:
if (ACCESSING_BITS_0_7)