protected override void Poke(RomCartMemoryBank bank, byte value)
{
base.Poke(bank, value);
ulong address = bank.GetAddress(this.shiftRegister, this.counter);
bool a1 = (address & A1Mask) == A1Mask;
bool a7 = (address & A7Mask) == A7Mask;
Eeprom.Update(a7, a1);
}
protected virtual byte Peek(RomCartMemoryBank bank)
{
byte data = bank.Peek(shiftRegister, counter);
if (!currentStrobe)
{
counter++;
// "... a 11 bit counter"
counter &= 0x07ff;
}
return(data);
}
// "The length of the strobe is 562.5 ns, the data is stable for 125 ns prior to the strobe and
// for 62.5 ns after the strobe. This is a 'blind' write from the CPU and must not be interrupted
// by another access to Suzy until it is finished.
// The CPU must not access Suzy for 12 ticks after the completion of the 'blind' write cycle."
protected virtual void Poke(RomCartMemoryBank bank, byte value)
{
// "The ROM Cart can also be written to. The addressing scheme is the same as for reads."
if (bank.WriteEnabled)
{
bank.Poke(shiftRegister, counter, value);
}
// "The strobe is also self timed."
if (!currentStrobe)
{
counter++;
// "... a 11 bit counter"
counter &= 0x07ff;
}
}
public RomCart(int bank0Size, int bank1Size)
{
Bank0 = new RomCartMemoryBank(bank0Size);
Bank1 = new RomCartMemoryBank(bank1Size);
}
protected override byte Peek(RomCartMemoryBank bank)
{
return(base.Peek(bank));
}