Esempio n. 1
0
void psxrcnt_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
	int n_counter = id;
	psx_root *root = &root_counter[ n_counter ];

	verboselog( machine(), 2, "root_finished( %d ) %04x\n", n_counter, root_current( n_counter ) );
	//if( ( root->n_mode & PSX_RC_COUNTTARGET ) != 0 )
	{
		/* TODO: wrap should be handled differently as PSX_RC_COUNTTARGET & PSX_RC_IRQTARGET don't have to be the same. */
		root->n_count = 0;
		root->n_start = gettotalcycles();
	}
	if( ( root->n_mode & PSX_RC_REPEAT ) != 0 )
	{
		root_timer_adjust( n_counter );
	}
	if( ( root->n_mode & PSX_RC_IRQOVERFLOW ) != 0 ||
		( root->n_mode & PSX_RC_IRQTARGET ) != 0 )
	{
		switch( n_counter )
		{
		case 0:
			m_irq0_handler(1);
			break;
		case 1:
			m_irq1_handler(1);
			break;
		case 2:
			m_irq2_handler(1);
			break;
		}
	}
}
Esempio n. 2
0
void psxrcnt_device::root_finished( void *ptr, int param )
{
	int n_counter = param;
	psx_root *root = &root_counter[ n_counter ];

	verboselog( machine(), 2, "root_finished( %d ) %04x\n", n_counter, root_current( n_counter ) );
	//if( ( root->n_mode & PSX_RC_COUNTTARGET ) != 0 )
	{
		/* TODO: wrap should be handled differently as PSX_RC_COUNTTARGET & PSX_RC_IRQTARGET don't have to be the same. */
		root->n_count = 0;
		root->n_start = gettotalcycles();
	}
	if( ( root->n_mode & PSX_RC_REPEAT ) != 0 )
	{
		root_timer_adjust( n_counter );
	}
	if( ( root->n_mode & PSX_RC_IRQOVERFLOW ) != 0 ||
		( root->n_mode & PSX_RC_IRQTARGET ) != 0 )
	{
		psx_irq_set( machine(), PSX_IRQ_ROOTCOUNTER0 << n_counter );
	}
}
Esempio n. 3
0
void psxrcnt_device::root_timer_adjust( int n_counter )
{
	psx_root *root = &root_counter[ n_counter ];

	if( ( root->n_mode & PSX_RC_STOP ) != 0 )
	{
		root->timer->adjust( attotime::never, n_counter);
	}
	else
	{
		int n_duration;

		n_duration = root_target( n_counter ) - root_current( n_counter );
		if( n_duration < 1 )
		{
			n_duration += 0x10000;
		}

		n_duration *= root_divider( n_counter );

		root->timer->adjust( attotime::from_hz(33868800) * n_duration, n_counter);
	}
}
Esempio n. 4
0
void psxrcnt_device::root_timer_adjust( int n_counter )
{
	psx_root *root = &root_counter[ n_counter ];

	if( ( root->n_mode & PSX_RC_STOP ) != 0 )
	{
		root->timer->adjust( attotime::never, n_counter);
	}
	else
	{
		int n_duration;

		n_duration = root_target( n_counter ) - root_current( n_counter );
		if( n_duration < 1 )
		{
			n_duration += 0x10000;
		}

		n_duration *= root_divider( n_counter );

		// TODO: figure out if this should be calculated from the cpu clock for 50mhz boards?
		root->timer->adjust( attotime::from_hz(33868800) * n_duration, n_counter);
	}
}