package com.loomcom.symon;
import com.loomcom.symon.devices.Memory;
import org.junit.*;
import static org.junit.Assert.*;
public class CpuIndirectIndexedModeTest {
protected Cpu cpu;
protected Bus bus;
protected Memory mem;
@Before
public void runBeforeEveryTest() throws Exception {
this.cpu = new Cpu();
this.bus = new Bus(0x0000, 0xffff);
this.mem = new Memory(0x0000, 0xffff);
bus.addCpu(cpu);
bus.addDevice(mem);
// Load the reset vector.
bus.write(0xfffc, Bus.DEFAULT_LOAD_ADDRESS & 0x00ff);
bus.write(0xfffd, (Bus.DEFAULT_LOAD_ADDRESS & 0xff00) >>> 8);
cpu.reset();
// Assert initial state
assertEquals(0, cpu.getAccumulator());
assertEquals(0, cpu.getXRegister());
assertEquals(0, cpu.getYRegister());
assertEquals(0x200, cpu.getProgramCounter());
assertEquals(0xff, cpu.getStackPointer());
assertEquals(0x20, cpu.getProcessorStatus());
}
@Test
public void test_LDA() throws Exception {
assertEquals(cpu.toString(), 0x00, cpu.getAccumulator());
bus.write(0x0014, 0x00);
bus.write(0x0015, 0xd8);
bus.write(0xd828, 0x03);
cpu.setYRegister(0x28);
bus.loadProgram(0xb1, 0x14); // LDA ($14),Y
cpu.step(1);
assertEquals(0x03, cpu.getAccumulator());
}
@Test
public void test_ORA() throws Exception {
bus.write(0x0014, 0x00);
bus.write(0x0015, 0xd8);
bus.write(0xd828, 0xe3);
cpu.setYRegister(0x28);
cpu.setAccumulator(0x32);
bus.loadProgram(0x11, 0x14); // ORA ($14),Y
cpu.step(1);
assertEquals(0xf3, cpu.getAccumulator());
assertEquals(0xe3, bus.read(0xd828));
}
@Test
public void test_AND() throws Exception {
bus.write(0x0014, 0x00);
bus.write(0x0015, 0xd8);
bus.write(0xd828, 0xe3);
cpu.setYRegister(0x28);
cpu.setAccumulator(0x32);
bus.loadProgram(0x31, 0x14); // AND ($14),Y
cpu.step(1);
assertEquals(0x22, cpu.getAccumulator());
assertEquals(0xe3, bus.read(0xd828));
}
}