public ControlWordBitField GetControlWord(bool init = false)
{
// when computer is reset it already has step 0 loaded. so next time it gets control word it will step to the next step, unless it is initializing
if (!init)
{
StepCounter.SetData(); // Increment Step counter by setting its value to 0x0000. It doesnt not affect its data "Load" signal is inactive
}
if ((Decoder & 0x20) == 0)
{
StepCounter.Reset(); // if the decoded output is 0x00100000 then it reached step 5 and needs to reset
}
//there are better ways, but this mirrors Ben Eater's implementation
//uCode address is defined by [FlagValue][InstructionValue][StepValue]
//Get the uCode address
byte FlagValue = (byte)(FlagsRegister.Data & 0x03);
byte InstructionValue = (byte)((InstructionRegister.Data & 0xF0) >> 4);
byte StepValue = (byte)(StepCounter.Data & 0x07);
return((ControlWordBitField)uCode[FlagValue, InstructionValue, StepValue]); //return uCode
}