Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 08:49:55 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

ym3812: Synchronize IRQ outputs to prevent lossage (nw)

Browse Source
This commit is contained in:
AJR 2018-06-30 16:39:00 -04:00
parent 95d60edf0a
commit 834867ce58
2 changed files with 19 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/devices/sound/3812intf.cpp
View File

@ -25,8 +25,7 @@
void ym3812_device::irq_handler(int irq)
{
if (!m_irq_handler.isnull())
m_irq_handler(irq);
m_timer[2]->adjust(attotime::zero, irq);
}
/* Timer overflow callback from timer.c */
@ -34,13 +33,18 @@ void ym3812_device::device_timer(emu_timer &timer, device_timer_id id, int param
{
switch(id)
{
case 0:
case TIMER_A:
ym3812_timer_over(m_chip,0);
break;
case 1:
case TIMER_B:
ym3812_timer_over(m_chip,1);
break;
case TIMER_IRQ_SYNC:
if (!m_irq_handler.isnull())
m_irq_handler(param);
break;
}
}
@ -87,8 +91,9 @@ void ym3812_device::device_start()
ym3812_set_irq_handler (m_chip, ym3812_device::static_irq_handler, this);
ym3812_set_update_handler(m_chip, ym3812_device::static_update_request, this);
m_timer[0] = timer_alloc(0);
m_timer[1] = timer_alloc(1);
m_timer[0] = timer_alloc(TIMER_A);
m_timer[1] = timer_alloc(TIMER_B);
m_timer[2] = timer_alloc(TIMER_IRQ_SYNC);
}
void ym3812_device::device_clock_changed()

9
src/devices/sound/3812intf.h
View File

@ -36,6 +36,13 @@ protected:
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
private:
enum
{
TIMER_A,
TIMER_B,
TIMER_IRQ_SYNC
};
void irq_handler(int irq);
void timer_handler(int c, const attotime &period);
void update_request() { m_stream->update(); }
@ -47,7 +54,7 @@ private:
static void static_update_request(device_t *param, int interval) { downcast<ym3812_device *>(param)->update_request(); }
sound_stream * m_stream;
emu_timer * m_timer[2];
emu_timer * m_timer[3];
void * m_chip;
devcb_write_line m_irq_handler;
};