public Byte GetColorCode(Byte x, Byte y)
{
if (x > 7)
{
throw new ArgumentOutOfRangeException(nameof(x), "x must be between 0 and 7");
}
if (y > 7)
{
throw new ArgumentOutOfRangeException(nameof(y), "y must be between 0 and 7");
}
Byte result = 0;
Byte rowIndex = y * 2;
if (data[rowIndex + 1].Read()[7 - x])
{
result |= 2;
}
if (data[rowIndex].Read()[7 - x])
{
result |= 1;
}
return(result);
}
private void SetRomBankNr(Byte value)
{
var bankNr = value & 0x0F;
if (bankNr == 0)
{
bankNr = 1;
}
romBanks.Switch(bankNr % romBankCount);
}
protected override void OnBank0Write(Address address, Byte value)
{
Byte highByte = GetHighByte(address);
if (highByte[0])
{
SetRomBankNr(value);
}
else
{
ToggleRam(value);
}
}
public void Initialize()
{
initialVolume = data >> 4;
isIncrease = data[3];
Byte stepLengthData = data & 7;
if (stepLengthData == 0 || (isIncrease && initialVolume == 0xF) || (!isIncrease && initialVolume == 0))
{
isActive = false;
}
else
{
var secondsPerStep = stepLengthData / 64d;
cyclesPerStep = (int)(secondsPerStep * Statics.Frequencies.cpuSpeed);
isActive = true;
}
}
public Address GetVolume(int elapsedCycles)
{
Byte currentVolume = initialVolume;
if (isActive)
{
int steps = elapsedCycles / cyclesPerStep;
if (isIncrease)
{
currentVolume = Math.Min(0x0F, initialVolume + steps);
}
else
{
currentVolume = Math.Max(0, initialVolume - steps);
}
}
return(ScaleVolume(currentVolume));
}
public void Write(Address address, Byte value, bool isCpu = false)
{
}
public override void Write(Address address, Byte value, bool isCpu = false)
{
base.Write(address % RAMSize, value, isCpu);
}
protected override void OnBank1Write(Address address, Byte value)
{
}
private void ToggleRam(Byte value)
{
var lowNibble = GetLowNibble(value);
((MbcRam)ramBanks).isEnabled = lowNibble == 0b1010;
}
public void Write(Address address, Byte value, bool isCpu = false) => data[address].Write(value);