2241 lines
60 KiB
JavaScript
2241 lines
60 KiB
JavaScript
import CPU6502 from '../js/cpu6502';
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function assertByte(b) {
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expect(b <= 0xFF).toEqual(true);
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expect(b >= 0x00).toEqual(true);
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}
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function Memory(size) {
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var data = Buffer.alloc(size << 8);
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return {
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start: function() {
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return 0;
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},
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end: function() {
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return size - 1;
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},
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read: function(page, off) {
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assertByte(page);
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assertByte(off);
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return data[(page << 8) | off];
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},
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write: function(page, off, val) {
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assertByte(page);
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assertByte(off);
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assertByte(val);
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data[(page << 8) | off] = val;
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},
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reset: function() {
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}
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};
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}
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function Program(page, code) {
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var data = Buffer.from(code);
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return {
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start: function() {
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return page;
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},
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end: function() {
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return page;
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},
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read: function(page, off) {
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assertByte(page);
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assertByte(off);
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return data[off];
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}
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};
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}
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var bios = new Program(0xff, [
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x48, 0x45, 0x4C, 0x4C, 0x4F, 0x0D, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0xff, 0x00, 0x04, 0x00, 0xff
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]);
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var FLAGS = {
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N: 0x80, // Negative
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V: 0x40, // oVerflow
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DEFAULT: 0x20, // Default
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B: 0x10, // Break
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D: 0x08, // Decimal
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I: 0x04, // Interrupt
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Z: 0x02, // Zero
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C: 0x01 // Carry
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};
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var DEFAULT_STATE = {
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cycles: 0,
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s: FLAGS.DEFAULT,
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sp: 0xff,
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a: 0x00,
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x: 0x00,
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y: 0x00,
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pc: 0x0400
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};
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var memory;
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var cpu;
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var program;
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function initState(initialState) {
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var state = Object.assign({}, DEFAULT_STATE, initialState);
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cpu.setState(state);
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}
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function expectState(initialState, expectedState) {
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var state = Object.assign({}, initialState, expectedState);
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expect(cpu.getState()).toEqual(state);
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}
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function initMemory(memAry) {
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for (var idx = 0; idx < memAry.length; idx++) {
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var mem = memAry[idx];
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var page = mem[0];
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var off = mem[1];
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var data = mem[2];
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for (var jdx = 0; jdx < data.length; jdx++) {
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cpu.write(page, off++, data[jdx]);
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if (off > 0xff) {
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page++;
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off = 0;
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}
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}
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}
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}
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function expectMemory(expectAry) {
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var memAry = [];
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for (var idx = 0; idx < expectAry.length; idx++) {
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var mem = expectAry[idx];
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var page = mem[0];
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var off = mem[1];
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var expectData = mem[2];
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var data = [];
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for (var jdx = 0; jdx < expectData.length; jdx++) {
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data.push(cpu.read(page, off++));
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if (off > 0xff) {
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page++;
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off = 0;
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}
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}
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memAry.push([mem[0], mem[1], data]);
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}
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expect(memAry).toEqual(expectAry);
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}
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function expectStack(expectAry) {
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var state = cpu.getState();
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expectMemory([[0x01, state.sp + 1, expectAry]]);
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}
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function testCode(code, steps, setupState, expectedState) {
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var initialState = Object.assign({}, DEFAULT_STATE, setupState);
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var finalState = Object.assign({
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pc: initialState.pc + code.length
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}, expectedState);
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program = new Program(0x04, code);
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cpu.addPageHandler(program);
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cpu.setState(initialState);
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cpu.stepDebug(steps);
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expectState(initialState, finalState);
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}
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describe('CPU6502', function() {
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beforeEach(function() {
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cpu = new CPU6502();
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memory = new Memory(4);
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cpu.addPageHandler(memory);
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cpu.addPageHandler(bios);
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});
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describe('#signals', function () {
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it('should reset', function () {
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cpu.reset();
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expectState(DEFAULT_STATE, {
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cycles: 2
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});
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});
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it('should irq', function () {
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cpu.irq();
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expectState(DEFAULT_STATE, {
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cycles: 5,
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s: FLAGS.DEFAULT | FLAGS.I,
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sp: 0xfc,
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pc: 0xff00
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});
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});
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it('should not irq if I set', function () {
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initState({
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s: FLAGS.DEFAULT | FLAGS.I
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});
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cpu.irq();
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expectState(DEFAULT_STATE, {
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s: FLAGS.DEFAULT | FLAGS.I,
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pc: 0x400
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});
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});
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it('should nmi', function () {
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cpu.nmi();
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expectState(DEFAULT_STATE, {
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cycles: 5,
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s: FLAGS.DEFAULT | FLAGS.I,
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sp: 0xfc,
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pc: 0xff00
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});
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});
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});
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describe('#misc', function () {
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it('should NOP', function () {
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testCode([0xEA], 1, {}, {
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cycles: 2
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});
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});
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it('should BRK', function () {
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testCode([0x00, 0x00], 1, {}, {
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cycles: 7,
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s: FLAGS.DEFAULT | FLAGS.I,
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sp: 0xfc,
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pc: 0xff00
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});
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});
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it('should RTI', function () {
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initMemory([[0x01, 0xFD, [0xA0, 0x34, 0x12]]]);
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testCode([0x40], 1, {
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sp: 0xFC
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}, {
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cycles: 6,
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s: FLAGS.DEFAULT | FLAGS.N,
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sp: 0xFF,
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pc: 0x1234
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});
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});
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});
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describe('#registers', function() {
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it('should LDA immediate', function () {
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testCode([0xA9, 0x44], 1, {}, {
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cycles: 2,
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a: 0x44
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});
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});
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it('should TAX', function () {
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testCode([0xAA], 1, {
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a: 0x44
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}, {
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cycles: 2,
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x: 0x44
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});
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});
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it('should TAY', function () {
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testCode([0xA8], 1, {
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a: 0x44
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}, {
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cycles: 2,
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y: 0x44
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});
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});
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it('should LDX immediate', function () {
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testCode([0xA2, 0x44], 1, {}, {
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cycles: 2,
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x: 0x44
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});
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});
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it('should TXA', function () {
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testCode([0x8A], 1, {
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x: 0x44
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}, {
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cycles: 2,
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a: 0x44
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});
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});
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it('should DEX', function () {
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testCode([0xCA], 1, {
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x: 0x44
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}, {
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cycles: 2,
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x: 0x43
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});
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});
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it('should INX', function () {
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testCode([0xE8], 1, {
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x: 0x44
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}, {
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cycles: 2,
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x: 0x45
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});
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});
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it('should LDY immediate', function () {
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testCode([0xA0, 0x44], 1, {}, {
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cycles: 2,
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y: 0x44
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});
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});
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it('should TYA', function () {
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testCode([0x98], 1, {
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y: 0x44
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}, {
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cycles: 2,
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a: 0x44
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});
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});
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it('should DEY', function () {
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testCode([0x88], 1, {
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y: 0x44
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}, {
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cycles: 2,
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y: 0x43
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});
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});
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it('should INY', function () {
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testCode([0xC8], 1, {
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y: 0x44
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}, {
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cycles: 2,
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y: 0x45
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});
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});
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});
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describe('#flags', function() {
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it('should SEC', function () {
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testCode([0x38], 1, {}, {
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cycles: 2,
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s: FLAGS.DEFAULT | FLAGS.C
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});
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});
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it('should CLC', function () {
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testCode([0x18], 1, {
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s: FLAGS.DEFAULT | FLAGS.C
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}, {
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cycles: 2,
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s: FLAGS.DEFAULT
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});
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});
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it('should SEI', function () {
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testCode([0x78], 1, {}, {
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cycles: 2,
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s: FLAGS.DEFAULT | FLAGS.I
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});
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});
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it('should CLI', function () {
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testCode([0x58], 1, {
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s: FLAGS.DEFAULT | FLAGS.I
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}, {
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cycles: 2,
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s: FLAGS.DEFAULT
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});
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});
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it('should CLV', function () {
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testCode([0xB8], 1, {
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s: FLAGS.DEFAULT | FLAGS.V
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}, {
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cycles: 2,
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s: FLAGS.DEFAULT
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});
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});
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it('should SED', function () {
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testCode([0xF8], 1, {}, {
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cycles: 2,
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s: FLAGS.DEFAULT | FLAGS.D
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});
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});
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it('should CLD', function () {
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testCode([0xD8], 1, {
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s: FLAGS.DEFAULT | FLAGS.D
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}, {
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cycles: 2,
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s: FLAGS.DEFAULT
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});
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});
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});
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describe('#stack', function() {
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it('should TXS', function() {
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testCode([0x9A], 1, {
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x: 0x44
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}, {
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cycles: 2,
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sp: 0x44
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});
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});
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it('should TSX', function() {
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testCode([0xBA], 1, {
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sp: 0x44
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}, {
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cycles: 2,
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x: 0x44
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});
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});
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it('should PHA', function() {
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testCode([0x48], 1, {
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a: 0x44
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}, {
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cycles: 3,
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sp: 0xfe
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});
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expectStack([0x44]);
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});
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it('should PLA', function() {
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initMemory([[0x01, 0xff, [0x44]]]);
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testCode([0x68], 1, {
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sp: 0xfe
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}, {
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cycles: 4,
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a: 0x44,
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sp: 0xff
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});
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});
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it('should PHP', function() {
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testCode([0x08], 1, {
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s: FLAGS.DEFAULT | FLAGS.N | FLAGS.C
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}, {
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cycles: 3,
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sp: 0xfe
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});
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expectStack([FLAGS.DEFAULT | FLAGS.B | FLAGS.N | FLAGS.C]);
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});
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it('should PLP', function() {
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initMemory([[0x01, 0xff, [FLAGS.N | FLAGS.C]]]);
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testCode([0x28], 1, {
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sp: 0xfe
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}, {
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cycles: 4,
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s: FLAGS.DEFAULT | FLAGS.N | FLAGS.C,
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sp: 0xff
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});
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});
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});
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describe('#jumps', function() {
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it('should JMP abs', function () {
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testCode([0x4C, 0x34, 0x12], 1, {}, {
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cycles: 3,
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pc: 0x1234
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});
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});
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it('should JMP (abs)', function () {
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initMemory([[0x03, 0x33, [0x34, 0x12]]]);
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testCode([0x6C, 0x33, 0x03], 1, {}, {
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cycles: 5,
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pc: 0x1234
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});
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});
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it('should JMP (abs) across page boundries with bugs', function () {
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initMemory([[0x02, 0xFF, [0x34, 0x12]],
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[0x02, 0x00, [0xff]]]);
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testCode([0x6C, 0xFF, 0x02], 1, {}, {
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cycles: 5,
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pc: 0xFF34
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});
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});
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it('should JSR abs', function () {
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testCode([0x20, 0x34, 0x12], 1, {}, {
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cycles: 6,
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sp: 0xFD,
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pc: 0x1234
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});
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expectStack([0x02, 0x04]);
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});
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it('should RTS', function () {
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initMemory([[0x01, 0xFE, [0x34, 0x12]]]);
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testCode([0x60], 1, {
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sp: 0xFD
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}, {
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cycles: 6,
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sp: 0xFF,
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pc: 0x1235
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});
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});
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});
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describe('#branches', function() {
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// ********** bcs
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it('should BCS forward', function () {
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testCode([0xB0, 0x7F], 1, {
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s: FLAGS.DEFAULT | FLAGS.C
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}, {
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cycles: 3,
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pc: 0x0481
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});
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});
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it('should BCS backward', function () {
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testCode([0xB0, 0xff], 1, {
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s: FLAGS.DEFAULT | FLAGS.C
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}, {
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cycles: 3,
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pc: 0x0401
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});
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});
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it('should BCS across pages with an extra cycle', function () {
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testCode([0xB0, 0xfd], 1, {
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s: FLAGS.DEFAULT | FLAGS.C
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}, {
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cycles: 4,
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pc: 0x03FF
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});
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});
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it('should not BCS if carry clear', function () {
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testCode([0xB0, 0xfd], 1, {}, {
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cycles: 2,
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pc: 0x0402
|
|
});
|
|
});
|
|
|
|
it('should BCC forward', function () {
|
|
testCode([0x90, 0x7F], 1, {}, {
|
|
cycles: 3,
|
|
pc: 0x0481
|
|
});
|
|
});
|
|
|
|
it('should BCC backward', function () {
|
|
testCode([0x90, 0xff], 1, {}, {
|
|
cycles: 3,
|
|
pc: 0x0401
|
|
});
|
|
});
|
|
|
|
it('should BCC across pages with an extra cycle', function () {
|
|
testCode([0x90, 0xfd], 1, {}, {
|
|
cycles: 4,
|
|
pc: 0x03FF
|
|
});
|
|
});
|
|
|
|
it('should not BCC if carry set', function () {
|
|
testCode([0x90, 0xfd], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
}, {
|
|
cycles: 2,
|
|
pc: 0x0402
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#read memory', function() {
|
|
// ********** zp
|
|
it('should LDY zp', function () {
|
|
initMemory([[0x00, 0x33, [0x44]]]);
|
|
testCode([0xA4, 0x33], 1, {}, {
|
|
cycles: 3,
|
|
y: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDA zp', function () {
|
|
initMemory([[0x00, 0x33, [0x44]]]);
|
|
testCode([0xA5, 0x33], 1, {}, {
|
|
cycles: 3,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDX zp', function () {
|
|
initMemory([[0x00, 0x33, [0x44]]]);
|
|
testCode([0xA6, 0x33], 1, {}, {
|
|
cycles: 3,
|
|
x: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** zp,x
|
|
it('should LDY zp,x', function () {
|
|
initMemory([[0x00, 0x36, [0x44]]]);
|
|
testCode([0xB4, 0x33], 1, {
|
|
x: 3
|
|
}, {
|
|
cycles: 4,
|
|
y: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDA zp,x', function () {
|
|
initMemory([[0x00, 0x36, [0x44]]]);
|
|
testCode([0xB5, 0x33], 1, {
|
|
x: 3
|
|
}, {
|
|
cycles: 4,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** zp,y
|
|
it('should LDX zp,y', function () {
|
|
initMemory([[0x00, 0x36, [0x44]]]);
|
|
testCode([0xB6, 0x33], 1, {
|
|
y: 3
|
|
}, {
|
|
cycles: 4,
|
|
x: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** (zp,x)
|
|
it('should LDA (zp,x)', function () {
|
|
initMemory([
|
|
[0x00, 0x36, [0x33, 0x03]],
|
|
[0x03, 0x33, [0x44]]]
|
|
);
|
|
testCode([0xA1, 0x33], 1, {
|
|
x: 3
|
|
}, {
|
|
cycles: 6,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** (zp),y
|
|
it('should LDA (zp),y', function () {
|
|
initMemory([
|
|
[0x00, 0x33, [0x33, 0x03]],
|
|
[0x03, 0x36, [0x44]]
|
|
]);
|
|
testCode([0xB1, 0x33], 1, {
|
|
y: 3
|
|
}, {
|
|
cycles: 5,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** (zp),y
|
|
it('should LDA (zp),y with an extra cycle on page cross', function () {
|
|
initMemory([
|
|
[0x00, 0x33, [0x33, 0x02]],
|
|
[0x03, 0x32, [0x44]]
|
|
]);
|
|
testCode([0xB1, 0x33], 1, {
|
|
y: 0xff
|
|
}, {
|
|
cycles: 6,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** abs
|
|
it('should LDY abs', function () {
|
|
initMemory([[0x03, 0x33, [0x44]]]);
|
|
testCode([0xAC, 0x33, 0x03], 1, {}, {
|
|
cycles: 4,
|
|
y: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDA abs', function () {
|
|
initMemory([[0x03, 0x33, [0x44]]]);
|
|
testCode([0xAD, 0x33, 0x03], 1, {}, {
|
|
cycles: 4,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDX abs', function () {
|
|
initMemory([[0x03, 0x33, [0x44]]]);
|
|
testCode([0xAE, 0x33, 0x03], 1, {}, {
|
|
cycles: 4,
|
|
x: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** abs, x
|
|
it('should LDY abs,x', function () {
|
|
initMemory([[0x03, 0x36, [0x44]]]);
|
|
testCode([0xBC, 0x33, 0x03], 1, {
|
|
x: 3
|
|
}, {
|
|
cycles: 4,
|
|
y: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDA abs,x', function () {
|
|
initMemory([[0x03, 0x36, [0x44]]]);
|
|
testCode([0xBD, 0x33, 0x03], 1, {
|
|
x: 3
|
|
}, {
|
|
cycles: 4,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDY abs,x with extra cycle on page cross', function () {
|
|
initMemory([[0x03, 0x32, [0x44]]]);
|
|
testCode([0xBC, 0x33, 0x02], 1, {
|
|
x: 0xff
|
|
}, {
|
|
cycles: 5,
|
|
y: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDA abs,x with extra cycle on page cross', function () {
|
|
initMemory([[0x03, 0x32, [0x44]]]);
|
|
testCode([0xBD, 0x33, 0x02], 1, {
|
|
x: 0xff
|
|
}, {
|
|
cycles: 5,
|
|
a: 0x44
|
|
});
|
|
});
|
|
|
|
// ********** abs, y
|
|
it('should LDX abs,y', function () {
|
|
initMemory([[0x03, 0x36, [0x44]]]);
|
|
testCode([0xBE, 0x33, 0x03], 1, {
|
|
y: 3
|
|
}, {
|
|
cycles: 4,
|
|
x: 0x44
|
|
});
|
|
});
|
|
|
|
it('should LDX abs,y with extra cycle on page cross', function () {
|
|
initMemory([[0x03, 0x32, [0x44]]]);
|
|
testCode([0xBE, 0x33, 0x02], 1, {
|
|
y: 0xff
|
|
}, {
|
|
cycles: 5,
|
|
x: 0x44
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#write memory', function() {
|
|
// ********** zp
|
|
it('should STY zp', function () {
|
|
testCode([0x84, 0x33], 1, {
|
|
y: 0x44
|
|
}, {
|
|
cycles: 3
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x44]]]);
|
|
});
|
|
|
|
it('should STA zp', function () {
|
|
testCode([0x85, 0x33], 1, {
|
|
a: 0x44
|
|
}, {
|
|
cycles: 3
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x44]]]);
|
|
});
|
|
|
|
it('should STX zp', function () {
|
|
testCode([0x86, 0x33], 1, {
|
|
x: 0x44
|
|
}, {
|
|
cycles: 3
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x44]]]);
|
|
});
|
|
|
|
// ********** zp,x
|
|
it('should STY zp,x', function () {
|
|
testCode([0x94, 0x33], 1, {
|
|
x: 3,
|
|
y: 0x44
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x00, 0x36, [0x44]]]);
|
|
});
|
|
|
|
it('should STA zp,x', function () {
|
|
testCode([0x95, 0x33], 1, {
|
|
a: 0x44,
|
|
x: 3
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x00, 0x36, [0x44]]]);
|
|
});
|
|
|
|
// ********** zp,y
|
|
it('should STX zp,y', function () {
|
|
testCode([0x96, 0x33], 1, {
|
|
x: 0x44,
|
|
y: 3
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x00, 0x36, [0x44]]]);
|
|
});
|
|
|
|
// ********** (zp,x)
|
|
it('should STA (zp,x)', function () {
|
|
initMemory([[0x00, 0x36, [0x33, 0x03]]]);
|
|
testCode([0x81, 0x33], 1, {
|
|
a: 0x44,
|
|
x: 3
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x44]]]);
|
|
});
|
|
|
|
// ********** (zp),y
|
|
it('should STA (zp),y', function () {
|
|
initMemory([[0x00, 0x33, [0x33, 0x03]]]);
|
|
testCode([0x91, 0x33], 1, {
|
|
a: 0x44,
|
|
y: 3
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x03, 0x36, [0x44]]]);
|
|
});
|
|
|
|
// ********** abs
|
|
it('should STY abs', function () {
|
|
testCode([0x8C, 0x33, 0x03], 1, {
|
|
y: 0x44
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x44]]]);
|
|
});
|
|
|
|
it('should STA abs', function () {
|
|
testCode([0x8D, 0x33, 0x03], 1, {
|
|
a: 0x44
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x44]]]);
|
|
});
|
|
|
|
it('should STX abs', function () {
|
|
testCode([0x8E, 0x33, 0x03], 1, {
|
|
x: 0x44
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x44]]]);
|
|
});
|
|
|
|
// ********** abs, x
|
|
it('should STA abs,x', function () {
|
|
testCode([0x9D, 0x33, 0x03], 1, {
|
|
a: 0x44,
|
|
x: 0x03
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x03, 0x36, [0x44]]]);
|
|
});
|
|
|
|
it('should STA abs,x with no extra cycle on page cross', function () {
|
|
testCode([0x9D, 0x33, 0x02], 1, {
|
|
a: 0x44,
|
|
x: 0xff
|
|
}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
expectMemory([[0x03, 0x32, [0x44]]]);
|
|
});
|
|
|
|
// ********** abs, y
|
|
it('should STA abs,y', function () {
|
|
testCode([0x99, 0x33, 0x03], 1, {
|
|
a: 0x44,
|
|
y: 0x03
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x03, 0x36, [0x44]]]);
|
|
});
|
|
|
|
it('should STA abs,y with no extra cycle on page cross', function () {
|
|
testCode([0x99, 0x33, 0x02], 1, {
|
|
a: 0x44,
|
|
y: 0xff
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x03, 0x32, [0x44]]]);
|
|
});
|
|
});
|
|
|
|
describe('#bit operations', function() {
|
|
// ********** ASL
|
|
it('should ASL A', function () {
|
|
testCode([0x0A], 1, {
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0xAA,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should ASL A with carry out', function () {
|
|
testCode([0x0A], 1, {
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x54,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should ASL abs', function () {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x0E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
expectMemory([[0x03, 0x33, [0xAA]]]);
|
|
});
|
|
|
|
it('should ASL abs with carry out', function () {
|
|
initMemory([[0x03, 0x33, [0xAA]]]);
|
|
testCode([0x0E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x54]]]);
|
|
});
|
|
|
|
// ********** ROL
|
|
it('should ROL A', function () {
|
|
testCode([0x2A], 1, {
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0xAA,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should ROL A with carry out', function () {
|
|
testCode([0x2A], 1, {
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x54,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should ROL A with carry in', function () {
|
|
testCode([0x2A], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C,
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x55,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should ROL abs', function () {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x2E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
expectMemory([[0x03, 0x33, [0xAA]]]);
|
|
});
|
|
|
|
it('should ROL abs with carry out', function () {
|
|
initMemory([[0x03, 0x33, [0xAA]]]);
|
|
testCode([0x2E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x54]]]);
|
|
});
|
|
|
|
it('should ROL abs with carry in', function () {
|
|
initMemory([[0x03, 0x33, [0xAA]]]);
|
|
testCode([0x2E, 0x33, 0x03], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x55]]]);
|
|
});
|
|
|
|
// ********** LSR
|
|
it('should LSR A', function () {
|
|
testCode([0x4A], 1, {
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x55
|
|
});
|
|
});
|
|
|
|
it('should LSR A with carry out', function () {
|
|
testCode([0x4A], 1, {
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x2A,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should LSR abs', function () {
|
|
initMemory([[0x03, 0x33, [0xAA]]]);
|
|
testCode([0x4E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x55]]]);
|
|
});
|
|
|
|
it('should LSR abs with carry out', function () {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x4E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x2A]]]);
|
|
});
|
|
|
|
// ********** ROR
|
|
it('should ROR A', function () {
|
|
testCode([0x6A], 1, {
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x55
|
|
});
|
|
});
|
|
|
|
it('should ROR A with carry out', function () {
|
|
testCode([0x6A], 1, {
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.C,
|
|
a: 0x2A
|
|
});
|
|
});
|
|
|
|
it('should ROR A with carry in', function () {
|
|
testCode([0x6A], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C,
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.C | FLAGS.N,
|
|
a: 0xAA
|
|
});
|
|
});
|
|
|
|
it('should ROR abs', function () {
|
|
initMemory([[0x03, 0x33, [0xAA]]]);
|
|
testCode([0x6E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x55]]]);
|
|
});
|
|
|
|
it('should ROR abs with carry out', function () {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x6E, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x2A]]]);
|
|
});
|
|
|
|
it('should ROR abs with carry in', function () {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x6E, 0x33, 0x03], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.C | FLAGS.N
|
|
});
|
|
expectMemory([[0x03, 0x33, [0xAA]]]);
|
|
});
|
|
|
|
it('should AND', function() {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x2D, 0x33, 0x03], 1, {
|
|
a: 0xA5
|
|
}, {
|
|
cycles: 4,
|
|
a: 0x05
|
|
});
|
|
});
|
|
|
|
it('should ORA', function() {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x0D, 0x33, 0x03], 1, {
|
|
a: 0xA0
|
|
}, {
|
|
cycles: 4,
|
|
s: FLAGS.DEFAULT | FLAGS.N,
|
|
a: 0xF5
|
|
});
|
|
});
|
|
|
|
it('should EOR', function() {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x4D, 0x33, 0x03], 1, {
|
|
a: 0xA5
|
|
}, {
|
|
cycles: 4,
|
|
s: FLAGS.DEFAULT | FLAGS.N,
|
|
a: 0xF0
|
|
});
|
|
});
|
|
|
|
it('should BIT zp', function() {
|
|
initMemory([[0x00, 0x33, [0x55]]]);
|
|
testCode([0x24, 0x33], 1, {
|
|
a: 0x55
|
|
}, {
|
|
cycles: 3,
|
|
s: FLAGS.DEFAULT | FLAGS.V
|
|
});
|
|
});
|
|
|
|
it('should BIT abs', function() {
|
|
initMemory([[0x03, 0x33, [0xAA]]]);
|
|
testCode([0x2C, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 4,
|
|
s: FLAGS.DEFAULT | FLAGS.N | FLAGS.Z
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#math', function() {
|
|
// ********** ADC
|
|
it('should ADC', function () {
|
|
testCode([0x69, 0x55], 1, {
|
|
a: 0x23
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x78,
|
|
s: FLAGS.DEFAULT
|
|
});
|
|
});
|
|
|
|
it('should ADC with carry in', function () {
|
|
testCode([0x69, 0x55], 1, {
|
|
a: 0x23,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x79,
|
|
s: FLAGS.DEFAULT
|
|
});
|
|
});
|
|
|
|
it('should ADC with overflow out', function () {
|
|
testCode([0x69, 0x55], 1, {
|
|
a: 0x2B
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x80,
|
|
s: FLAGS.DEFAULT | FLAGS.N | FLAGS.V
|
|
});
|
|
});
|
|
|
|
it('should ADC with carry out', function () {
|
|
testCode([0x69, 0x55], 1, {
|
|
a: 0xBB
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x10,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
// ********** ADC BCD
|
|
it('should ADC BCD', function () {
|
|
testCode([0x69, 0x16], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D,
|
|
a: 0x25
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.V,
|
|
a: 0x41
|
|
});
|
|
});
|
|
|
|
it('should ADC BCD with carry in', function () {
|
|
testCode([0x69, 0x55], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.C,
|
|
a: 0x23
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT| FLAGS.D | FLAGS.V,
|
|
a: 0x79
|
|
});
|
|
});
|
|
|
|
it('should ADC BCD with carry out', function () {
|
|
testCode([0x69, 0x10], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D,
|
|
a: 0x91
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x01,
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.C
|
|
});
|
|
});
|
|
|
|
// ********** SBC
|
|
it('should SBC', function () {
|
|
testCode([0xE9, 0x23], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C,
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x32,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should SBC with borrow in', function () {
|
|
testCode([0xE9, 0x23], 1, {
|
|
s: FLAGS.DEFAULT,
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x31,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should SBC with borrow out', function () {
|
|
testCode([0xE9, 0x55], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C,
|
|
a: 0x23
|
|
}, {
|
|
cycles: 2,
|
|
a: 0xCE,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should SBC with overflow out', function () {
|
|
testCode([0xE9, 0x7F], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.C,
|
|
a: 0xAF
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x30,
|
|
s: FLAGS.DEFAULT | FLAGS.V | FLAGS.C
|
|
});
|
|
});
|
|
|
|
// ********** SBC BCD
|
|
it('should SBC BCD', function () {
|
|
testCode([0xE9, 0x23], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.C,
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x32,
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should SBC BCD with borrow in', function () {
|
|
testCode([0xE9, 0x23], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D,
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x31,
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should SBC BCD with borrow out', function () {
|
|
testCode([0xE9, 0x55], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D | FLAGS.C,
|
|
a: 0x23
|
|
}, {
|
|
cycles: 2,
|
|
a: 0x68,
|
|
s: FLAGS.DEFAULT | FLAGS.D
|
|
});
|
|
});
|
|
|
|
// ********** INC
|
|
it('should INC zp', function() {
|
|
initMemory([[0x00, 0x33, [0x44]]]);
|
|
testCode([0xE6, 0x33], 1, {
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x45]]]);
|
|
});
|
|
|
|
it('should INC zp,x', function() {
|
|
initMemory([[0x00, 0x043, [0x44]]]);
|
|
testCode([0xF6, 0x33], 1, {
|
|
x: 0x10
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x00, 0x43, [0x45]]]);
|
|
});
|
|
|
|
it('should INC abs', function() {
|
|
initMemory([[0x03, 0x33, [0x44]]]);
|
|
testCode([0xEE, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x45]]]);
|
|
});
|
|
|
|
it('should INC abs,x', function() {
|
|
initMemory([[0x03, 0x043, [0x44]]]);
|
|
testCode([0xFE, 0x33, 0x03], 1, {
|
|
x: 0x10
|
|
}, {
|
|
cycles: 7
|
|
});
|
|
expectMemory([[0x03, 0x43, [0x45]]]);
|
|
});
|
|
|
|
// ********** DEC
|
|
it('should DEC zp', function() {
|
|
initMemory([[0x00, 0x33, [0x44]]]);
|
|
testCode([0xC6, 0x33], 1, {
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x43]]]);
|
|
});
|
|
|
|
it('should DEC zp,x', function() {
|
|
initMemory([[0x00, 0x043, [0x44]]]);
|
|
testCode([0xD6, 0x33], 1, {
|
|
x: 0x10
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x00, 0x43, [0x43]]]);
|
|
});
|
|
|
|
it('should DEC abs', function() {
|
|
initMemory([[0x03, 0x33, [0x44]]]);
|
|
testCode([0xCE, 0x33, 0x03], 1, {
|
|
}, {
|
|
cycles: 6
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x43]]]);
|
|
});
|
|
|
|
it('should DEC abs,x', function() {
|
|
initMemory([[0x03, 0x043, [0x44]]]);
|
|
testCode([0xDE, 0x33, 0x03], 1, {
|
|
x: 0x10
|
|
}, {
|
|
cycles: 7
|
|
});
|
|
expectMemory([[0x03, 0x43, [0x43]]]);
|
|
});
|
|
});
|
|
|
|
describe('#comparison', function() {
|
|
// ********** CMP
|
|
it('should CMP less than', function() {
|
|
testCode([0xc9, 0x44], 1, {
|
|
a: 0x33
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should CMP equal', function() {
|
|
testCode([0xc9, 0x44], 1, {
|
|
a: 0x44
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.Z | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should CMP greater than', function() {
|
|
testCode([0xc9, 0x44], 1, {
|
|
a: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
// ********** CPX
|
|
it('should CPX less than', function() {
|
|
testCode([0xE0, 0x44], 1, {
|
|
x: 0x33
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should CPX equal', function() {
|
|
testCode([0xE0, 0x44], 1, {
|
|
x: 0x44
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.Z | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should CPX greater than', function() {
|
|
testCode([0xE0, 0x44], 1, {
|
|
x: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
|
|
// ********** CPY
|
|
it('should CPY less than', function() {
|
|
testCode([0xE0, 0x44], 1, {
|
|
y: 0x33
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should CPY equal', function() {
|
|
testCode([0xc0, 0x44], 1, {
|
|
y: 0x44
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.Z | FLAGS.C
|
|
});
|
|
});
|
|
|
|
it('should CPY greater than', function() {
|
|
testCode([0xc0, 0x44], 1, {
|
|
y: 0x55
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.C
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#utility', function() {
|
|
it('should list', function() {
|
|
var listing = cpu.list(0xff00);
|
|
expect(listing[0]).toEqual('FF00- 00 00 BRK #$00');
|
|
});
|
|
|
|
it('should list with symbols', function() {
|
|
var listing = cpu.list(0xff00, {0x00: 'ZERO', 0xFF00: 'ENTRY'});
|
|
expect(listing[0]).toEqual('FF00- ENTRY 00 00 BRK #ZERO');
|
|
});
|
|
|
|
it('should dump page', function() {
|
|
var page = cpu.dumpPage(0xff);
|
|
expect(page).toContain('FF80: 48 45 4C 4C 4F 0D 00 00 00 00 00 00 00 00 00 00 HELLO...........');
|
|
});
|
|
|
|
it('should dump registers', function() {
|
|
var regs = cpu.dumpRegisters();
|
|
expect(regs).toEqual('0000- A=00 X=00 Y=00 P=20 S=FF --------');
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('65c02', function() {
|
|
beforeEach(function() {
|
|
cpu = new CPU6502({'65C02': true});
|
|
memory = new Memory(4);
|
|
|
|
cpu.addPageHandler(memory);
|
|
cpu.addPageHandler(bios);
|
|
});
|
|
|
|
describe('#signals', function() {
|
|
it('should clear D on IRQ', function() {
|
|
initState({
|
|
s: FLAGS.DEFAULT | FLAGS.D
|
|
});
|
|
|
|
cpu.irq();
|
|
|
|
expectState(DEFAULT_STATE, {
|
|
cycles: 5,
|
|
s: FLAGS.DEFAULT | FLAGS.I,
|
|
sp: 0xfc,
|
|
pc: 0xff00
|
|
});
|
|
});
|
|
|
|
it('should clear D on NMI', function() {
|
|
initState({
|
|
s: FLAGS.DEFAULT | FLAGS.D
|
|
});
|
|
|
|
cpu.nmi();
|
|
|
|
expectState(DEFAULT_STATE, {
|
|
cycles: 5,
|
|
s: FLAGS.DEFAULT | FLAGS.I,
|
|
sp: 0xfc,
|
|
pc: 0xff00
|
|
});
|
|
});
|
|
|
|
it('should clear D on BRK', function () {
|
|
testCode([0x00, 0x00], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.D
|
|
}, {
|
|
cycles: 7,
|
|
s: FLAGS.DEFAULT | FLAGS.I,
|
|
sp: 0xfc,
|
|
pc: 0xff00
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#stack', function() {
|
|
it('should PHX', function() {
|
|
testCode([0xDA], 1, {
|
|
x: 0x44
|
|
}, {
|
|
cycles: 3,
|
|
sp: 0xfe
|
|
});
|
|
expectStack([0x44]);
|
|
});
|
|
|
|
it('should PLX', function() {
|
|
initMemory([[0x01, 0xff, [0x44]]]);
|
|
testCode([0xFA], 1, {
|
|
sp: 0xfe
|
|
}, {
|
|
cycles: 4,
|
|
x: 0x44,
|
|
sp: 0xff
|
|
});
|
|
});
|
|
|
|
it('should PHY', function() {
|
|
testCode([0x5A], 1, {
|
|
y: 0x44
|
|
}, {
|
|
cycles: 3,
|
|
sp: 0xfe
|
|
});
|
|
expectStack([0x44]);
|
|
});
|
|
|
|
it('should PLY', function() {
|
|
initMemory([[0x01, 0xff, [0x44]]]);
|
|
testCode([0x7A], 1, {
|
|
sp: 0xfe
|
|
}, {
|
|
cycles: 4,
|
|
y: 0x44,
|
|
sp: 0xff
|
|
});
|
|
});
|
|
|
|
});
|
|
|
|
describe('#jumps', function() {
|
|
it('should JMP (abs)', function () {
|
|
initMemory([[0x03, 0x33, [0x34, 0x12]]]);
|
|
testCode([0x6C, 0x33, 0x03], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x1234
|
|
});
|
|
});
|
|
|
|
it('should JMP (abs) across page boundries without bugs', function () {
|
|
initMemory([[0x02, 0xFF, [0x34, 0x12]],
|
|
[0x02, 0x00, [0xff]]]);
|
|
testCode([0x6C, 0xFF, 0x02], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x1234
|
|
});
|
|
});
|
|
|
|
it('should JMP (abs, x)', function () {
|
|
initMemory([[0x03, 0x43, [0x34, 0x12]]]);
|
|
testCode([0x7C, 0x33, 0x03], 1, {
|
|
x: 0x10
|
|
}, {
|
|
cycles: 6,
|
|
pc: 0x1234
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#other addressing mode fixes', function () {
|
|
it('should INC abs,x', function() {
|
|
initMemory([[0x03, 0x043, [0x44]]]);
|
|
testCode([0xFE, 0x33, 0x03], 1, {
|
|
x: 0x10
|
|
}, {
|
|
cycles: 7
|
|
});
|
|
expectMemory([[0x03, 0x43, [0x45]]]);
|
|
});
|
|
});
|
|
|
|
describe('#branches', function() {
|
|
it('should BRA forward', function () {
|
|
testCode([0x80, 0x7F], 1, {}, {
|
|
cycles: 3,
|
|
pc: 0x0481
|
|
});
|
|
});
|
|
|
|
it('should BRA backward', function () {
|
|
testCode([0x80, 0xFF], 1, {}, {
|
|
cycles: 3,
|
|
pc: 0x0401
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#read memory', function() {
|
|
// ********** (zp)
|
|
it('should LDA (zp)', function () {
|
|
initMemory([[0x00, 0x33, [0x33,0x03]],
|
|
[0x03, 0x33, [0x44]]]);
|
|
testCode([0xB2, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
a: 0x44
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('#write memory', function() {
|
|
// ********** (zp)
|
|
it('should STA (zp)', function () {
|
|
initMemory([[0x00, 0x33, [0x33, 0x03]]]);
|
|
testCode([0x92, 0x33], 1, {
|
|
a: 0x44
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x44]]]);
|
|
});
|
|
|
|
it('should STZ abs', function () {
|
|
initMemory([[0x03, 0x33, [0x44]]]);
|
|
testCode([0x9C, 0x33, 0x03], 1, {
|
|
a: 0x44
|
|
}, {
|
|
cycles: 4
|
|
});
|
|
expectMemory([[0x03, 0x33, [0x00]]]);
|
|
});
|
|
});
|
|
|
|
describe('#logical operators', function() {
|
|
it('should BIT imm and effect other flags', function() {
|
|
testCode([0x89, 0x33], 1, {
|
|
s: FLAGS.DEFAULT | FLAGS.N,
|
|
a: 0x44
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT | FLAGS.Z | FLAGS.N
|
|
});
|
|
});
|
|
|
|
it('should BIT imm', function() {
|
|
testCode([0x89, 0x33], 1, {
|
|
a: 0x03
|
|
}, {
|
|
cycles: 2,
|
|
s: FLAGS.DEFAULT
|
|
});
|
|
});
|
|
|
|
// ******** TRB
|
|
it('should TRB zp', function() {
|
|
initMemory([[0x00, 0x33, [0x55]]]);
|
|
testCode([0x14, 0x33], 1, {
|
|
a: 0xA5
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x50]]]);
|
|
});
|
|
|
|
it('should TRB abs', function() {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x1C, 0x33, 0x03], 1, {
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.Z
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x00]]]);
|
|
});
|
|
|
|
// ******** TSB
|
|
it('should TSB zp', function() {
|
|
initMemory([[0x00, 0x33, [0x55]]]);
|
|
testCode([0x04, 0x33], 1, {
|
|
a: 0xA5
|
|
}, {
|
|
cycles: 5
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xF5]]]);
|
|
});
|
|
|
|
it('should TSB abs', function() {
|
|
initMemory([[0x03, 0x33, [0x55]]]);
|
|
testCode([0x0C, 0x33, 0x03], 1, {
|
|
a: 0xAA
|
|
}, {
|
|
cycles: 6,
|
|
s: FLAGS.DEFAULT | FLAGS.Z
|
|
});
|
|
expectMemory([[0x03, 0x33, [0xFF]]]);
|
|
});
|
|
});
|
|
|
|
describe('Branch bit set/reset', function () {
|
|
// ******** BBR
|
|
it('BBR0 should branch if bit 0 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xFE]]]);
|
|
testCode([0x0F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR0 should branch backward', function () {
|
|
initMemory([[0x00, 0x33, [0xFE]]]);
|
|
testCode([0x0F, 0x33, 0xFF], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0402
|
|
});
|
|
});
|
|
|
|
it('BBR1 should branch if bit 1 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xFD]]]);
|
|
testCode([0x1F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR2 should branch if bit 2 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xFB]]]);
|
|
testCode([0x2F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR3 should branch if bit 3 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xF7]]]);
|
|
testCode([0x3F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR4 should branch if bit 4 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xEF]]]);
|
|
testCode([0x4F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR5 should branch if bit 5 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xDF]]]);
|
|
testCode([0x5F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR6 should branch if bit 6 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xBF]]]);
|
|
testCode([0x6F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR7 should branch if bit 7 clear', function() {
|
|
initMemory([[0x00, 0x33, [0x7F]]]);
|
|
testCode([0x7F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBR0 should not branch if bit 0 set', function() {
|
|
initMemory([[0x00, 0x33, [0x01]]]);
|
|
testCode([0x0F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR1 should not branch if bit 1 set', function() {
|
|
initMemory([[0x00, 0x33, [0x02]]]);
|
|
testCode([0x1F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR2 should not branch if bit 2 set', function() {
|
|
initMemory([[0x00, 0x33, [0x04]]]);
|
|
testCode([0x2F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR3 should not branch if bit 3 set', function() {
|
|
initMemory([[0x00, 0x33, [0x08]]]);
|
|
testCode([0x3F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR4 should not branch if bit 4 set', function() {
|
|
initMemory([[0x00, 0x33, [0x10]]]);
|
|
testCode([0x4F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR5 should not branch if bit 5 set', function() {
|
|
initMemory([[0x00, 0x33, [0x20]]]);
|
|
testCode([0x5F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR6 should not branch if bit 6 set', function() {
|
|
initMemory([[0x00, 0x33, [0x40]]]);
|
|
testCode([0x6F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBR7 should not branch if bit 7 set', function() {
|
|
initMemory([[0x00, 0x33, [0x80]]]);
|
|
testCode([0x7F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
// ******** BBS
|
|
it('BBS0 should branch if bit 0 set', function() {
|
|
initMemory([[0x00, 0x33, [0x01]]]);
|
|
testCode([0x8F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS0 should branch backward', function () {
|
|
initMemory([[0x00, 0x33, [0x01]]]);
|
|
testCode([0x8F, 0x33, 0xFF], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0402
|
|
});
|
|
});
|
|
|
|
it('BBS1 should branch if bit 1 set', function() {
|
|
initMemory([[0x00, 0x33, [0x02]]]);
|
|
testCode([0x9F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS2 should branch if bit 2 set', function() {
|
|
initMemory([[0x00, 0x33, [0x04]]]);
|
|
testCode([0xAF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS3 should branch if bit 3 set', function() {
|
|
initMemory([[0x00, 0x33, [0x08]]]);
|
|
testCode([0xBF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS4 should branch if bit 4 set', function() {
|
|
initMemory([[0x00, 0x33, [0x10]]]);
|
|
testCode([0xCF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS5 should branch if bit 5 set', function() {
|
|
initMemory([[0x00, 0x33, [0x20]]]);
|
|
testCode([0xDF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS6 should branch if bit 6 set', function() {
|
|
initMemory([[0x00, 0x33, [0x40]]]);
|
|
testCode([0xEF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS7 should branch if bit 7 set', function() {
|
|
initMemory([[0x00, 0x33, [0x80]]]);
|
|
testCode([0xFF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 6,
|
|
pc: 0x0482
|
|
});
|
|
});
|
|
|
|
it('BBS0 should not branch if bit 0 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xFE]]]);
|
|
testCode([0x8F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS1 should not branch if bit 1 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xFD]]]);
|
|
testCode([0x9F, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS2 should not branch if bit 2 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xFB]]]);
|
|
testCode([0xAF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS3 should not branch if bit 3 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xF7]]]);
|
|
testCode([0xBF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS4 should not branch if bit 4 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xEF]]]);
|
|
testCode([0xCF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS5 should not branch if bit 5 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xDF]]]);
|
|
testCode([0xDF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS6 should not branch if bit 6 clear', function() {
|
|
initMemory([[0x00, 0x33, [0xBF]]]);
|
|
testCode([0xEF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
|
|
it('BBS7 should not branch if bit 7 clear', function() {
|
|
initMemory([[0x00, 0x33, [0x7B]]]);
|
|
testCode([0xFF, 0x33, 0x7F], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0403
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('Bit set/reset', function () {
|
|
it('RMB0 should reset bit 0', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x07, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xFE]]]);
|
|
});
|
|
|
|
it('RMB1 should reset bit 1', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x17, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xFD]]]);
|
|
});
|
|
|
|
it('RMB2 should reset bit 2', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x27, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xFB]]]);
|
|
});
|
|
|
|
it('RMB3 should reset bit 3', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x37, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xF7]]]);
|
|
});
|
|
|
|
it('RMB4 should reset bit 4', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x47, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xEF]]]);
|
|
});
|
|
|
|
it('RMB5 should reset bit 5', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x57, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xDF]]]);
|
|
});
|
|
|
|
it('RMB6 should reset bit 6', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x67, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0xBF]]]);
|
|
});
|
|
|
|
it('RMB7 should reset bit 7', function() {
|
|
initMemory([[0x00, 0x33, [0xFF]]]);
|
|
testCode([0x77, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x7F]]]);
|
|
});
|
|
|
|
it('SMB0 should set bit 0', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0x87, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x01]]]);
|
|
});
|
|
|
|
it('SMB1 should set bit 1', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0x97, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x02]]]);
|
|
});
|
|
|
|
it('SMB2 should set bit 2', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0xA7, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x04]]]);
|
|
});
|
|
|
|
it('SMB3 should set bit 3', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0xB7, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x08]]]);
|
|
});
|
|
|
|
it('SMB4 should set bit 4', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0xC7, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x10]]]);
|
|
});
|
|
|
|
it('SMB5 should set bit 5', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0xD7, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x20]]]);
|
|
});
|
|
|
|
it('SMB6 should set bit 6', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0xE7, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x40]]]);
|
|
});
|
|
|
|
it('SMB7 should set bit 7', function() {
|
|
initMemory([[0x00, 0x33, [0x00]]]);
|
|
testCode([0xF7, 0x33], 1, {}, {
|
|
cycles: 5,
|
|
pc: 0x0402
|
|
});
|
|
expectMemory([[0x00, 0x33, [0x80]]]);
|
|
});
|
|
});
|
|
|
|
describe('#math', function() {
|
|
// INC A
|
|
it('should INC A', function() {
|
|
testCode([0x1A], 1, {
|
|
a: 0x44
|
|
},{
|
|
cycles: 2,
|
|
a: 0x45
|
|
});
|
|
});
|
|
|
|
// DEC A
|
|
it('should DEC A', function() {
|
|
testCode([0x3A], 1, {
|
|
a: 0x44
|
|
},{
|
|
cycles: 2,
|
|
a: 0x43
|
|
});
|
|
});
|
|
});
|
|
});
|