protected override void OnLastCycleLastM()
{
// perform jump
if (IsConditionMet())
{
var d = (sbyte)InstructionM2.Data.Value;
Registers.PC = Alu.Add(Registers.PC, d);
}
}
protected override void OnClockHigh()
{
if (ExecutionEngine.Cycles.IsLastCycle)
{
Cpu.Registers.PC = Alu.Add(Cpu.Registers.PC, _deltaPC);
}
base.OnClockHigh();
}
private ushort GetAddress()
{
ushort address;
if (ExecutionEngine.Opcode.Definition.IsIX)
{
address = Registers.IX;
}
else if (ExecutionEngine.Opcode.Definition.IsIY)
{
address = Registers.IY;
}
else
{
throw Errors.AssignedToIllegalOpcode();
}
return(Alu.Add(address, (sbyte)InstructionM2.Data.Value));
}
protected ushort GetHLOrIXIY(bool useOffset = true)
{
if (ExecutionEngine.Opcode.Definition.IsIX)
{
if (ExecutionEngine.Opcode.Definition.d && useOffset)
{
ThrowIfNoParametersFound();
return(Alu.Add(Registers.IX, (sbyte)ExecutionEngine.MultiCycleOpcode.GetParameter(0).Value));
}
return(Registers.IX);
}
if (ExecutionEngine.Opcode.Definition.IsIY)
{
if (ExecutionEngine.Opcode.Definition.d && useOffset)
{
ThrowIfNoParametersFound();
return(Alu.Add(Registers.IY, (sbyte)ExecutionEngine.MultiCycleOpcode.GetParameter(0).Value));
}
return(Registers.IY);
}
return(Registers.HL);
}
public void When_ByteHalfOverFlow_Expect_HalfCarryFlagSet()
{
registers.Reset();
alu.Add((byte)15, (byte)1);
Assert.True(registers.AreFlagsSet(RegisterFlags.H));
}