private void LoadSNA(string path)
{
byte[] snapshot = File.ReadAllBytes(path);
Registers r = _cpu.Registers;
r.I = snapshot[0];
r.ExchangeBCDEHL();
r.HL = getWord(1);
r.DE = getWord(3);
r.BC = getWord(5);
r.AF = getWord(7);
r.ExchangeBCDEHL();
r.HL = getWord(9);
r.DE = getWord(11);
r.BC = getWord(13);
r.IY = getWord(15);
r.IX = getWord(17);
if (snapshot[19].GetBit(2))
{
_cpu.EnableInterrupts();
}
r.R = snapshot[20];
r[WordRegister.AF] = getWord(21);
r.SP = getWord(23);
_cpu.SetInterruptMode((InterruptMode)snapshot[25]);
_screen.SetBorderColour(DisplayColour.FromThreeBit(snapshot[26]));
_cpu.Memory.Untimed.WriteBytesAt(16384, snapshot[27..]);
public void Fill(byte[] pixels, byte[] attributes)
{
for (byte y = 0; y < 192; y++)
{
ushort address = _screenLineAddresses[y]; // base address for this screen line
for (byte x = 0; x < 32; x++)
{
byte pixelData = pixels[address + x];
for (int i = 0; i < 8; i++)
{
_pixels[y, (x * 8) + i] = pixelData.GetBit(7 - i);
}
}
}
int columnCounter = 0;
int rowCounter = 0;
foreach (byte attribute in attributes)
{
// 32 x 24
AttributeMap[rowCounter, columnCounter] = new DisplayAttribute()
{
Ink = DisplayColour.FromThreeBit(attribute.GetByteFromBits(0, 3)),
Paper = DisplayColour.FromThreeBit(attribute.GetByteFromBits(3, 3)),
Bright = attribute.GetBit(6),
Flash = attribute.GetBit(7)
};
columnCounter++;
if (columnCounter == 32)
{
columnCounter = 0;
rowCounter++;
}
}
}