public void TestAddByteZeroFlag()
{
bus.WriteWord(4, 0xd402); // add.b d2,d2
//this should be true as 0xFFFFFF00_byte -> 00
TestADDByteZeroFlag(cpu, true, -128, -256);
}
public void TestTasBroken()
{
TAS.EmulateBrokenTAS = true;
bus.WriteWord(4, 0x4AC0); //TAS D0
cpu.SetPC(4);
cpu.SetDataRegisterLong(0, 0);
cpu.Execute();
int res = cpu.GetDataRegisterLong(0);
Assert.Equal(0, (res & 0xFF) >> 7);
}
public void TestADD()
{
cpu.SetPC(4);
cpu.SetDataRegisterByte(0, 0x40);
cpu.SetDataRegisterByte(1, 0x80);
bus.WriteWord(4, 0xd001); // add.b d1,d0
int ticks = cpu.Execute();
Assert.Equal(6, cpu.GetPC());
Assert.Equal(0xc0, cpu.GetDataRegisterByte(0));
Assert.Equal(0x80, cpu.GetDataRegisterByte(1));
Assert.Equal(4, ticks);
Assert.False(cpu.IsFlagSet(cpu.CFlag));
Assert.False(cpu.IsFlagSet(cpu.VFlag));
Assert.False(cpu.IsFlagSet(cpu.ZFlag));
Assert.True(cpu.IsFlagSet(cpu.NFlag));
Assert.False(cpu.IsFlagSet(cpu.XFlag));
cpu.SetPC(4);
cpu.SetDataRegisterWord(0, 0x8000);
cpu.SetDataRegisterWord(1, 0x8500);
bus.WriteWord(4, 0xd041); // add.w d1,d0
ticks = cpu.Execute();
Assert.Equal(6, cpu.GetPC());
Assert.Equal(0x0500, cpu.GetDataRegisterWord(0));
Assert.Equal(0x8500, cpu.GetDataRegisterWord(1));
Assert.Equal(4, ticks);
Assert.True(cpu.IsFlagSet(cpu.CFlag));
Assert.True(cpu.IsFlagSet(cpu.VFlag));
Assert.False(cpu.IsFlagSet(cpu.ZFlag));
Assert.False(cpu.IsFlagSet(cpu.NFlag));
Assert.True(cpu.IsFlagSet(cpu.XFlag));
cpu.SetPC(4);
cpu.SetDataRegisterLong(0, -4);
cpu.SetDataRegisterLong(1, 0x04);
bus.WriteWord(4, 0xd081); // add.l d1,d0
ticks = cpu.Execute();
Assert.Equal(6, cpu.GetPC());
Assert.Equal(0, cpu.GetDataRegisterLong(0));
Assert.Equal(0x04, cpu.GetDataRegisterWord(1));
Assert.Equal(6, ticks);
Assert.True(cpu.IsFlagSet(cpu.CFlag));
Assert.False(cpu.IsFlagSet(cpu.VFlag));
Assert.True(cpu.IsFlagSet(cpu.ZFlag));
Assert.False(cpu.IsFlagSet(cpu.NFlag));
Assert.True(cpu.IsFlagSet(cpu.XFlag));
}
public void TestSubByteZeroFlag()
{
bus.WriteWord(4, 0x9402); // sub.b d2,d2
TestSUBByteZeroFlag(cpu, true, -128, -256);
}
