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;
/* update externals */
update_6821_interrupts(p);
}
}
}
/* set the new value for CA2 */
p->in_cb2 = data;
p->in_set |= PIA_IN_SET_CB2;
}
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 C6821::SetCB2(BYTE byData)
{
byData = byData ? 1 : 0;
// CA2 is in input mode
if ( C2_INPUT( m_byCTLB ) )
{
// the new state has caused a transition
if ( m_byICB2 ^ byData )
{
// handle the active transition
if ( ( byData && C2_LOW_TO_HIGH( m_byCTLB ) ) ||
( !byData && C2_HIGH_TO_LOW( m_byCTLB ) ) )
{
// mark the IRQ
SET_IRQ2( m_byCTLB );
// update externals
UpdateInterrupts();
}
}
}
// set the new value for CA2
m_byICB2 = byData;
}
