/// <summary>
/// Method for creating an object in memory. If object already exists
/// an error is thrown.
/// </summary>
/// <param name="mem"></param>
public static void Create(Memory mem)
{
if (instance != null)
{
throw new Exception("Object already created");
}
instance = new CPU6502(mem);
}
/// <summary>
/// Writes data to PPUDMA register
/// </summary>
/// <param name="value"></param>
private void writeDMA(byte value)
{
CPU6502 cpu = CPU6502.Instance;
ushort addr = (ushort)(value << 8);
for (int i = 0; i < 256; i++)
{
oamData[oamAddress] = cpu.RAM.ReadMemory(addr);
oamAddress++;
addr++;
}
cpu.Stall += 513;
if (cpu.Cycle % 2 == 1)
{
cpu.Stall++;
}
}
