public PPI8255(X8086 cpu, InterruptRequest irq)
{
task = new TaskSC(this);
for (int i = 0x60; i <= 0x6F; i++)
{
ValidPortAddress.Add((uint)i);
}
//PPISystemControl = x8086.WordToBitsArray(&HA5, PPISystemControl.Length)
//PPI = x8086.WordToBitsArray(&HA, PPISystemControl.Length)
//PPICommandModeRegister = &H99
this.cpu = cpu;
this.sched = cpu.Sched;
this.irq = irq;
if (cpu.PIT != null)
{
timer = cpu.PIT;
timer.SetCh2Gate((ppiB & 1) != 0);
}
keyBuf = "";
keyShiftPending = false;
keyMap = new KeyMap();
}
// Constructs and resets counter
public Counter(PIT8254 owner)
{
this.owner = owner;
// assume no gate signal
mGgate = false;
// set undefined mode
countMode = -1;
outputValue = false;
}