public override void WriteEXP(int addr, byte value)
{
addr &= 0xF800;
switch (addr)
{
case 0x0800:
audio.WriteData(value);
break;
case 0x1000:
irq_counter = (irq_counter & 0xFF00) | value;
irq_pending = false;
SyncIRQ();
break;
case 0x1800:
{
irq_counter = (irq_counter & 0x00FF) | (((value & 0x7F) << 8));
bool last_enabled = irq_enabled;
irq_enabled = value.Bit(7);
irq_pending = false;
SyncIRQ();
break;
}
}
}
