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;
}
}
}
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 );
}
}
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);
}
}
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);
}
}
