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apple1js/test/cpu6502.spec.js
Will Scullin ff98e1916a
Add test files.
2019-11-23 15:20:21 -08:00

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import CPU6502 from '../js/cpu6502';
function assertByte(b) {
expect(b <= 0xFF).toEqual(true);
expect(b >= 0x00).toEqual(true);
}
function Memory(size) {
var data = Buffer.alloc(size << 8);
return {
start: function() {
return 0;
},
end: function() {
return size - 1;
},
read: function(page, off) {
assertByte(page);
assertByte(off);
return data[(page << 8) | off];
},
write: function(page, off, val) {
assertByte(page);
assertByte(off);
assertByte(val);
data[(page << 8) | off] = val;
},
reset: function() {
}
};
}
function Program(page, code) {
var data = Buffer.from(code);
return {
start: function() {
return page;
},
end: function() {
return page;
},
read: function(page, off) {
assertByte(page);
assertByte(off);
return data[off];
}
};
}
var bios = new Program(0xff, [
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x48, 0x45, 0x4C, 0x4C, 0x4F, 0x0D, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff, 0x00, 0x04, 0x00, 0xff
]);
var FLAGS = {
N: 0x80, // Negative
V: 0x40, // oVerflow
DEFAULT: 0x20, // Default
B: 0x10, // Break
D: 0x08, // Decimal
I: 0x04, // Interrupt
Z: 0x02, // Zero
C: 0x01 // Carry
};
var DEFAULT_STATE = {
cycles: 0,
s: FLAGS.DEFAULT,
sp: 0xff,
a: 0x00,
x: 0x00,
y: 0x00,
pc: 0x0400
};
var memory;
var cpu;
var program;
function initState(initialState) {
var state = Object.assign({}, DEFAULT_STATE, initialState);
cpu.setState(state);
}
function expectState(initialState, expectedState) {
var state = Object.assign({}, initialState, expectedState);
expect(cpu.getState()).toEqual(state);
}
function initMemory(memAry) {
for (var idx = 0; idx < memAry.length; idx++) {
var mem = memAry[idx];
var page = mem[0];
var off = mem[1];
var data = mem[2];
for (var jdx = 0; jdx < data.length; jdx++) {
cpu.write(page, off++, data[jdx]);
if (off > 0xff) {
page++;
off = 0;
}
}
}
}
function expectMemory(expectAry) {
var memAry = [];
for (var idx = 0; idx < expectAry.length; idx++) {
var mem = expectAry[idx];
var page = mem[0];
var off = mem[1];
var expectData = mem[2];
var data = [];
for (var jdx = 0; jdx < expectData.length; jdx++) {
data.push(cpu.read(page, off++));
if (off > 0xff) {
page++;
off = 0;
}
}
memAry.push([mem[0], mem[1], data]);
}
expect(memAry).toEqual(expectAry);
}
function expectStack(expectAry) {
var state = cpu.getState();
expectMemory([[0x01, state.sp + 1, expectAry]]);
}
function testCode(code, steps, setupState, expectedState) {
var initialState = Object.assign({}, DEFAULT_STATE, setupState);
var finalState = Object.assign({
pc: initialState.pc + code.length
}, expectedState);
program = new Program(0x04, code);
cpu.addPageHandler(program);
cpu.setState(initialState);
cpu.stepDebug(steps);
expectState(initialState, finalState);
}
describe('CPU6502', function() {
beforeEach(function() {
cpu = new CPU6502();
memory = new Memory(4);
cpu.addPageHandler(memory);
cpu.addPageHandler(bios);
});
describe('#signals', function () {
it('should reset', function () {
cpu.reset();
expectState(DEFAULT_STATE, {
cycles: 2
});
});
it('should irq', function () {
cpu.irq();
expectState(DEFAULT_STATE, {
cycles: 5,
s: FLAGS.DEFAULT | FLAGS.I,
sp: 0xfc,
pc: 0xff00
});
});
it('should not irq if I set', function () {
initState({
s: FLAGS.DEFAULT | FLAGS.I
});
cpu.irq();
expectState(DEFAULT_STATE, {
s: FLAGS.DEFAULT | FLAGS.I,
pc: 0x400
});
});
it('should nmi', function () {
cpu.nmi();
expectState(DEFAULT_STATE, {
cycles: 5,
s: FLAGS.DEFAULT | FLAGS.I,
sp: 0xfc,
pc: 0xff00
});
});
});
describe('#misc', function () {
it('should NOP', function () {
testCode([0xEA], 1, {}, {
cycles: 2
});
});
it('should BRK', function () {
testCode([0x00, 0x00], 1, {}, {
cycles: 7,
s: FLAGS.DEFAULT | FLAGS.I,
sp: 0xfc,
pc: 0xff00
});
});
it('should RTI', function () {
initMemory([[0x01, 0xFD, [0xA0, 0x34, 0x12]]]);
testCode([0x40], 1, {
sp: 0xFC
}, {
cycles: 6,
s: FLAGS.DEFAULT | FLAGS.N,
sp: 0xFF,
pc: 0x1234
});
});
});
describe('#registers', function() {
it('should LDA immediate', function () {
testCode([0xA9, 0x44], 1, {}, {
cycles: 2,
a: 0x44
});
});
it('should TAX', function () {
testCode([0xAA], 1, {
a: 0x44
}, {
cycles: 2,
x: 0x44
});
});
it('should TAY', function () {
testCode([0xA8], 1, {
a: 0x44
}, {
cycles: 2,
y: 0x44
});
});
it('should LDX immediate', function () {
testCode([0xA2, 0x44], 1, {}, {
cycles: 2,
x: 0x44
});
});
it('should TXA', function () {
testCode([0x8A], 1, {
x: 0x44
}, {
cycles: 2,
a: 0x44
});
});
it('should DEX', function () {
testCode([0xCA], 1, {
x: 0x44
}, {
cycles: 2,
x: 0x43
});
});
it('should INX', function () {
testCode([0xE8], 1, {
x: 0x44
}, {
cycles: 2,
x: 0x45
});
});
it('should LDY immediate', function () {
testCode([0xA0, 0x44], 1, {}, {
cycles: 2,
y: 0x44
});
});
it('should TYA', function () {
testCode([0x98], 1, {
y: 0x44
}, {
cycles: 2,
a: 0x44
});
});
it('should DEY', function () {
testCode([0x88], 1, {
y: 0x44
}, {
cycles: 2,
y: 0x43
});
});
it('should INY', function () {
testCode([0xC8], 1, {
y: 0x44
}, {
cycles: 2,
y: 0x45
});
});
});
describe('#flags', function() {
it('should SEC', function () {
testCode([0x38], 1, {}, {
cycles: 2,
s: FLAGS.DEFAULT | FLAGS.C
});
});
it('should CLC', function () {
testCode([0x18], 1, {
s: FLAGS.DEFAULT | FLAGS.C
}, {
cycles: 2,
s: FLAGS.DEFAULT
});
});
it('should SEI', function () {
testCode([0x78], 1, {}, {
cycles: 2,
s: FLAGS.DEFAULT | FLAGS.I
});
});
it('should CLI', function () {
testCode([0x58], 1, {
s: FLAGS.DEFAULT | FLAGS.I
}, {
cycles: 2,
s: FLAGS.DEFAULT
});
});
it('should CLV', function () {
testCode([0xB8], 1, {
s: FLAGS.DEFAULT | FLAGS.V
}, {
cycles: 2,
s: FLAGS.DEFAULT
});
});
it('should SED', function () {
testCode([0xF8], 1, {}, {
cycles: 2,
s: FLAGS.DEFAULT | FLAGS.D
});
});
it('should CLD', function () {
testCode([0xD8], 1, {
s: FLAGS.DEFAULT | FLAGS.D
}, {
cycles: 2,
s: FLAGS.DEFAULT
});
});
});
describe('#stack', function() {
it('should TXS', function() {
testCode([0x9A], 1, {
x: 0x44
}, {
cycles: 2,
sp: 0x44
});
});
it('should TSX', function() {
testCode([0xBA], 1, {
sp: 0x44
}, {
cycles: 2,
x: 0x44
});
});
it('should PHA', function() {
testCode([0x48], 1, {
a: 0x44
}, {
cycles: 3,
sp: 0xfe
});
expectStack([0x44]);
});
it('should PLA', function() {
initMemory([[0x01, 0xff, [0x44]]]);
testCode([0x68], 1, {
sp: 0xfe
}, {
cycles: 4,
a: 0x44,
sp: 0xff
});
});
it('should PHP', function() {
testCode([0x08], 1, {
s: FLAGS.DEFAULT | FLAGS.N | FLAGS.C
}, {
cycles: 3,
sp: 0xfe
});
expectStack([FLAGS.DEFAULT | FLAGS.B | FLAGS.N | FLAGS.C]);
});
it('should PLP', function() {
initMemory([[0x01, 0xff, [FLAGS.N | FLAGS.C]]]);
testCode([0x28], 1, {
sp: 0xfe
}, {
cycles: 4,
s: FLAGS.DEFAULT | FLAGS.N | FLAGS.C,
sp: 0xff
});
});
});
describe('#jumps', function() {
it('should JMP abs', function () {
testCode([0x4C, 0x34, 0x12], 1, {}, {
cycles: 3,
pc: 0x1234
});
});
it('should JMP (abs)', function () {
initMemory([[0x03, 0x33, [0x34, 0x12]]]);
testCode([0x6C, 0x33, 0x03], 1, {}, {
cycles: 5,
pc: 0x1234
});
});
it('should JMP (abs) across page boundries with bugs', function () {
initMemory([[0x02, 0xFF, [0x34, 0x12]],
[0x02, 0x00, [0xff]]]);
testCode([0x6C, 0xFF, 0x02], 1, {}, {
cycles: 5,
pc: 0xFF34
});
});
it('should JSR abs', function () {
testCode([0x20, 0x34, 0x12], 1, {}, {
cycles: 6,
sp: 0xFD,
pc: 0x1234
});
expectStack([0x02, 0x04]);
});
it('should RTS', function () {
initMemory([[0x01, 0xFE, [0x34, 0x12]]]);
testCode([0x60], 1, {
sp: 0xFD
}, {
cycles: 6,
sp: 0xFF,
pc: 0x1235
});
});
});
describe('#branches', function() {
// ********** bcs
it('should BCS forward', function () {
testCode([0xB0, 0x7F], 1, {
s: FLAGS.DEFAULT | FLAGS.C
}, {
cycles: 3,
pc: 0x0481
});
});
it('should BCS backward', function () {
testCode([0xB0, 0xff], 1, {
s: FLAGS.DEFAULT | FLAGS.C
}, {
cycles: 3,
pc: 0x0401
});
});
it('should BCS across pages with an extra cycle', function () {
testCode([0xB0, 0xfd], 1, {
s: FLAGS.DEFAULT | FLAGS.C
}, {
cycles: 4,
pc: 0x03FF
});
});
it('should not BCS if carry clear', function () {
testCode([0xB0, 0xfd], 1, {}, {
cycles: 2,
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
});
});
});
});
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