void C6821::UpdateInterrupts()
{
BYTE byNewState;
// start with IRQ A
byNewState = 0;
if ( ( IRQ1( m_byCTLA ) && IRQ1_ENABLED( m_byCTLA ) ) ||
( IRQ2( m_byCTLA ) && IRQ2_ENABLED( m_byCTLA ) ) )
byNewState = 1;
if ( byNewState != m_byIRQAState )
{
m_byIRQAState = byNewState;
PIA_W_CALLBACK( m_stOutIRQA, m_byIRQAState );
}
/* then do IRQ B */
byNewState = 0;
if ( ( IRQ1( m_byCTLB ) && IRQ1_ENABLED( m_byCTLB ) ) ||
( IRQ2( m_byCTLB ) && IRQ2_ENABLED( m_byCTLB ) ) )
byNewState = 1;
if ( byNewState != m_byIRQBState )
{
m_byIRQBState = byNewState;
PIA_W_CALLBACK( m_stOutIRQB, m_byIRQBState );
}
}
void pia_set_input_cb2 (int which, int data)
{
struct pia6821 *p = pia + which;
/* limit the data to 0 or 1 */
data = data ? 1 : 0;
/* CB2 is in input mode */
if (C2_INPUT (p->ctl_b))
{
/* the new state has caused a transition */
if (p->in_cb2 ^ data)
{
/* handle the active transition */
if ((data && C2_LOW_TO_HIGH (p->ctl_b)) || (!data && C2_HIGH_TO_LOW (p->ctl_b)))
{
/* mark the IRQ */
p->irq_b2 = 1;
/* call the IRQ function if enabled */
if (IRQ2_ENABLED (p->ctl_b))
if (p->irq_b_func) p->irq_b_func ();
}
}
}
/* set the new value for CA2 */
p->in_cb2 = data;
}
void pia6821_device::update_interrupts()
{
// start with IRQ A
int new_state = (m_irq_a1 && IRQ1_ENABLED(m_ctl_a)) || (m_irq_a2 && IRQ2_ENABLED(m_ctl_a));
if (new_state != m_irq_a_state)
{
m_irq_a_state = new_state;
m_irq_a_func(m_irq_a_state);
}
// then do IRQ B
new_state = (m_irq_b1 && IRQ1_ENABLED(m_ctl_b)) || (m_irq_b2 && IRQ2_ENABLED(m_ctl_b));
if (new_state != m_irq_b_state)
{
m_irq_b_state = new_state;
m_irq_b_func(m_irq_b_state);
}
}
static void update_6821_interrupts(struct pia6821 *p)
{
int new_state;
/* start with IRQ A */
new_state = 0;
if ((p->irq_a1 && IRQ1_ENABLED(p->ctl_a)) || (p->irq_a2 && IRQ2_ENABLED(p->ctl_a))) new_state = 1;
if (new_state != p->irq_a_state)
{
p->irq_a_state = new_state;
if (p->intf->irq_a_func) update_shared_irq_handler(p->intf->irq_a_func);
}
/* then do IRQ B */
new_state = 0;
if ((p->irq_b1 && IRQ1_ENABLED(p->ctl_b)) || (p->irq_b2 && IRQ2_ENABLED(p->ctl_b))) new_state = 1;
if (new_state != p->irq_b_state)
{
p->irq_b_state = new_state;
if (p->intf->irq_b_func) update_shared_irq_handler(p->intf->irq_b_func);
}
}
static void update_interrupts(const device_config *device)
{
pia6821_state *p = get_token(device);
int new_state;
/* start with IRQ A */
new_state = (p->irq_a1 && IRQ1_ENABLED(p->ctl_a)) || (p->irq_a2 && IRQ2_ENABLED(p->ctl_a));
if (new_state != p->irq_a_state)
{
p->irq_a_state = new_state;
devcb_call_write_line(&p->irq_a_func, p->irq_a_state);
}
/* then do IRQ B */
new_state = (p->irq_b1 && IRQ1_ENABLED(p->ctl_b)) || (p->irq_b2 && IRQ2_ENABLED(p->ctl_b));
if (new_state != p->irq_b_state)
{
p->irq_b_state = new_state;
devcb_call_write_line(&p->irq_b_func, p->irq_b_state);
}
}
