Exemple #1
0
/*
    The INTA*, INTB*, and READY* lines are connected to each PEB card and are
    pulled up when inactive. If any card asserts the line (pulling down), the
    line state goes down. So we must keep a record which cards pull down the
    line.
*/
void peribox_device::inta_join(int slot, int state)
{
	if (VERBOSE>7) LOG("Peribox propagating INTA from slot %d to console: %d\n", slot, state);
	if (state==ASSERT_LINE)
		m_inta_flag |= (1 << slot);
	else
		m_inta_flag &= ~(1 << slot);

	m_console_inta((m_inta_flag != 0)? ASSERT_LINE : CLEAR_LINE);
}
Exemple #2
0
/*
    The INTA*, INTB*, and READY* lines are connected to each PEB card and are
    pulled up when inactive. If any card asserts the line (pulling down), the
    line state goes down. So we must keep a record which cards pull down the
    line.

    (We're doing a kind of wired-AND here.)
*/
void peribox_device::inta_join(int slot, int state)
{
	if (TRACE_INT) logerror("%s: propagating INTA from slot %d to console: %d\n", tag(), slot, state);
	if (state==ASSERT_LINE)
		m_inta_flag |= (1 << slot);
	else
		m_inta_flag &= ~(1 << slot);

	m_console_inta((m_inta_flag != 0)? ASSERT_LINE : CLEAR_LINE);
}