EightBitNet/MC6809/MC6809.UnitTest/CmpTests.cs
Adrian Conlon 72932cf462 Correct a few more style/correctness issues.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2019-05-06 11:02:20 +01:00

131 lines
4.2 KiB
C#

// <copyright file="CmpTests.cs" company="Adrian Conlon">
// Copyright (c) Adrian Conlon. All rights reserved.
// </copyright>
namespace EightBit
{
using Microsoft.VisualStudio.TestTools.UnitTesting;
[TestClass]
public class CmpTests
{
private readonly Board board = new Board();
private readonly MC6809 cpu;
public CmpTests() => this.cpu = this.board.CPU;
[TestInitialize]
public void Initialise()
{
this.board.RaisePOWER();
this.cpu.Step(); // Step over the reset
}
[TestCleanup]
public void Cleanup() => this.board.LowerPOWER();
[TestMethod]
public void TestImmediateByte()
{
this.board.Poke(0, 0x81);
this.board.Poke(1, 0x18);
this.cpu.A = 0xf6;
this.cpu.Step();
Assert.AreEqual(0xf6, this.cpu.A);
Assert.AreEqual(0, this.cpu.Zero);
Assert.AreEqual(0, this.cpu.Overflow);
Assert.AreNotEqual(0, this.cpu.Negative);
Assert.AreEqual(0, this.cpu.Carry);
Assert.AreEqual(2, this.cpu.Cycles);
}
// Indirect mode: CMPA ,Y+ (CMP1)
[TestMethod]
public void TestCMP1()
{
this.board.Poke(0, 0xa1);
this.board.Poke(1, 0xa0);
this.board.Poke(0x205, 0xff);
this.cpu.CC = 0;
this.cpu.A = 0xff;
this.cpu.B = 0;
this.cpu.X.Word = 0;
this.cpu.Y.Word = 0x205;
this.cpu.U.Word = 0;
this.cpu.Step();
Assert.AreEqual(0xff, this.cpu.A);
Assert.AreEqual(0, this.cpu.B);
Assert.AreEqual(0, this.cpu.X.Word);
Assert.AreEqual(0x206, this.cpu.Y.Word);
Assert.AreEqual(0, this.cpu.U.Word);
Assert.AreNotEqual(0, this.cpu.Zero);
Assert.AreEqual(6, this.cpu.Cycles);
}
// B = 0xA0, CMPB with 0xA0
[TestMethod]
public void TestCMP2()
{
this.board.Poke(0, 0xc1);
this.board.Poke(1, 0xa0);
this.cpu.CC = (byte)StatusBits.NF;
this.cpu.B = 0xa0;
this.cpu.Step();
Assert.AreEqual(0, this.cpu.Negative);
Assert.AreNotEqual(0, this.cpu.Zero);
Assert.AreEqual(0, this.cpu.Overflow);
Assert.AreEqual(0, this.cpu.Carry);
Assert.AreEqual(2, this.cpu.Cycles);
}
// B = 0x70, CMPB with 0xA0
[TestMethod]
public void TestCMP3()
{
this.board.Poke(0, 0xc1);
this.board.Poke(1, 0xa0);
this.cpu.CC = (byte)StatusBits.NF;
this.cpu.B = 0x70;
this.cpu.Step();
Assert.AreNotEqual(0, this.cpu.Carry);
Assert.AreNotEqual(0, this.cpu.Overflow);
Assert.AreEqual(0, this.cpu.Zero);
Assert.AreNotEqual(0, this.cpu.Negative);
Assert.AreEqual(2, this.cpu.Cycles);
}
// Compare 0x5410 with 0x5410
[TestMethod]
public void TestCMP16()
{
this.cpu.CC = (byte)(StatusBits.HF | StatusBits.VF | StatusBits.CF);
this.cpu.X.Word = 0x5410;
this.cpu.PokeWord(0x33, 0x5410);
this.board.Poke(0, 0xbc);
this.cpu.PokeWord(1, 0x33);
this.cpu.Step();
Assert.AreEqual(0x5410, this.cpu.X.Word);
Assert.AreEqual(0, this.cpu.Carry);
Assert.AreEqual(0, this.cpu.Overflow);
Assert.AreNotEqual(0, this.cpu.Zero);
Assert.AreEqual(0, this.cpu.Negative);
Assert.AreEqual(7, this.cpu.Cycles);
}
[TestMethod]
public void TestImmediateWord()
{
this.board.Poke(0, 0x8c);
this.cpu.PokeWord(1, 0x1bb0);
this.cpu.X.Word = 0x1ab0;
this.cpu.Step();
Assert.AreEqual(0x1ab0, this.cpu.X.Word);
Assert.AreEqual(0, this.cpu.Zero);
Assert.AreEqual(0, this.cpu.Overflow);
Assert.AreNotEqual(0, this.cpu.Negative);
Assert.AreNotEqual(0, this.cpu.Carry);
Assert.AreEqual(4, this.cpu.Cycles);
}
}
}