static void update_6821_interrupts(pia6821 p)
{
int new_state;
/* start with IRQ A */
new_state = 0;
if ((p.irq_a1 != 0 && IRQ1_ENABLED(p.ctl_a)) || (p.irq_a2 != 0 && IRQ2_ENABLED(p.ctl_a))) new_state = 1;
if (new_state != p.irq_a_state)
{
p.irq_a_state = (byte)new_state;
if (p.intf.irq_a_func != null) update_shared_irq_handler(p.intf.irq_a_func);
}
/* then do IRQ B */
new_state = 0;
if ((p.irq_b1 != 0 && IRQ1_ENABLED(p.ctl_b)) || (p.irq_b2 != 0 && IRQ2_ENABLED(p.ctl_b))) new_state = 1;
if (new_state != p.irq_b_state)
{
p.irq_b_state = (byte)new_state;
if (p.intf.irq_b_func != null) update_shared_irq_handler(p.intf.irq_b_func);
}
}
public static void pia_unconfig()
{
for (int i = 0; i < MAX_PIA; i++) pia[i] = new pia6821();
}
public static void pia_reset()
{
/* zap each structure, preserving the interface and swizzle */
for (int i = 0; i < MAX_PIA; i++)
{
pia6821_interface intf = pia[i].intf;
byte addr = pia[i].addr;
pia[i] = new pia6821();
pia[i].intf = intf;
pia[i].addr = addr;
}
}
