protected override void InternalExecute(CpuState cpuState, IMemory memory, byte arg, Action<byte> write, ref int cycles)
{
var sum = (ushort) (arg + cpuState.A);
if (cpuState.IsFlagSet(CpuState.Flags.Carry))
{
++sum;
}
var byteSum = (byte)(sum & 0xFF);
cpuState.SetOverflow(cpuState.A, arg, byteSum);
cpuState.A = byteSum;
cpuState.SetZeroFlag(cpuState.A);
cpuState.SetNegativeFlag(cpuState.A);
cpuState.SetFlag(CpuState.Flags.Carry, sum & 0xFF00);
}
protected override void InternalExecute(CpuState cpuState, IMemory memory, byte arg, Action<byte> write, ref int cycles)
{
// A - M - C -> A N Z C I D V
// + + + - - +
int a = cpuState.A;
arg ^= 0xFF;
a += arg;
if (cpuState.IsFlagSet(CpuState.Flags.Carry))
{
++a;
}
var byteResult = (byte) (a & 0xFF);
cpuState.SetOverflow(cpuState.A, arg, byteResult);
cpuState.A = byteResult;
cpuState.SetNegativeFlag(cpuState.A);
cpuState.SetZeroFlag(cpuState.A);
cpuState.SetFlag(CpuState.Flags.Carry, (byteResult & 0x80) == 0);
}