public override int Execute(C6502 cpu, byte operand)
{
cpu.State.ProcessorStatus = cpu.Pop();
byte b1 = cpu.Pop();
byte b2 = cpu.Pop();
cpu.State.ProgramCounter = (ushort)((b2 << 8) | b1);
return(6);
}
public override int Execute(C6502 cpu, byte operand)
{
byte b1 = cpu.Pop();
byte b2 = cpu.Pop();
// low byte first, b1 is low byte
ushort address = (ushort)((b2 << 8) | b1);
cpu.State.ProgramCounter = (ushort)(address + 1);
return(6);
}
public override int Execute(C6502 cpu, byte operand)
{
cpu.State.RegA = cpu.Pop();
SetNegative(cpu, () => Helper.IsSigned(cpu.State.RegA));
SetZero(cpu, () => cpu.State.RegA == 0);
return(4);
}
public override int Execute(C6502 cpu, byte operand)
{
cpu.State.ProcessorStatus = cpu.Pop();
return(4);
}
