More unit tests. SBC partially working, but I need to figure out what's going wrong.
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Seth J. Morabito committed
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package com.loomcom.symon;
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import com.loomcom.symon.devices.Memory;
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import com.loomcom.symon.exceptions.MemoryRangeException;
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import junit.framework.*;
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public class CpuImmediateModeTest extends TestCase {
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protected Cpu cpu;
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protected Bus bus;
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protected Memory mem;
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public void setUp() throws MemoryRangeException {
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this.cpu = new Cpu();
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this.bus = new Bus(0x0000, 0xffff);
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this.mem = new Memory(0x0000, 0x10000);
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bus.addCpu(cpu);
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bus.addDevice(mem);
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// Load the reset vector.
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bus.write(0xfffc, Cpu.DEFAULT_BASE_ADDRESS & 0x00ff);
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bus.write(0xfffd, (Cpu.DEFAULT_BASE_ADDRESS & 0xff00)>>>8);
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cpu.reset();
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}
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/* ORA Immediate Mode Tests - 0x09 */
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public void test_ORA_SetsAccumulator() {
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bus.loadProgram(0x09, 0x00, // ORA #$00
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0x09, 0x11, // ORA #$11
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0x09, 0x22, // ORA #$22
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0x09, 0x44, // ORA #$44
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0x09, 0x88); // ORA #$88
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cpu.step();
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assertEquals(0x00, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x11, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x33, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x77, cpu.getAccumulator());
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cpu.step();
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assertEquals(0xff, cpu.getAccumulator());
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}
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public void test_ORA_SetsZeroFlagIfResultIsZero() {
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bus.loadProgram(0x09, 0x00); // ORA #$00
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cpu.step();
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assertTrue(cpu.getZeroFlag());
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}
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public void test_ORA_DoesNotSetZeroFlagIfResultNotZero() {
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bus.loadProgram(0x09, 0x01); // ORA #$01
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cpu.step();
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assertFalse(cpu.getZeroFlag());
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}
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public void test_ORA_SetsNegativeFlagIfResultIsNegative() {
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bus.loadProgram(0x09, 0x80); // ORA #$80
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cpu.step();
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assertTrue(cpu.getNegativeFlag());
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}
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public void test_ORA_DoesNotSetNegativeFlagIfResultNotNegative() {
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bus.loadProgram(0x09, 0x7f); // ORA #$7F
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cpu.step();
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assertFalse(cpu.getNegativeFlag());
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}
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/* AND Immediate Mode Tests - 0x29 */
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public void test_AND_SetsAccumulator() {
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bus.loadProgram(0x29, 0x00, // AND #$00
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0x29, 0x11, // AND #$11
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0xa9, 0xaa, // LDA #$AA
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0x29, 0xff, // AND #$FF
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0x29, 0x99, // AND #$99
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0x29, 0x11); // AND #$11
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cpu.step();
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assertEquals(0x00, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x00, cpu.getAccumulator());
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cpu.step(2);
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assertEquals(0xaa, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x88, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x00, cpu.getAccumulator());
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}
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public void test_AND_SetsZeroFlagIfResultIsZero() {
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bus.loadProgram(0xa9, 0x88, // LDA #$88
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0x29, 0x11); // AND #$11
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cpu.step(2);
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assertTrue(cpu.getZeroFlag());
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}
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public void test_AND_DoesNotSetZeroFlagIfResultNotZero() {
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bus.loadProgram(0xa9, 0x88, // LDA #$88
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0x29, 0xf1); // AND #$F1
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cpu.step(2);
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assertFalse(cpu.getZeroFlag());
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}
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public void test_AND_SetsNegativeFlagIfResultIsNegative() {
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bus.loadProgram(0xa9, 0x88, // LDA #$88
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0x29, 0xf0); // AND #$F0
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cpu.step(2);
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assertTrue(cpu.getNegativeFlag());
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}
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public void test_AND_DoesNotSetNegativeFlagIfResultNotNegative() {
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bus.loadProgram(0xa9, 0x88, // LDA #$88
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0x29, 0x0f); // AND #$0F
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cpu.step(2);
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assertFalse(cpu.getNegativeFlag());
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}
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/* EOR Immediate Mode Tests - 0x49 */
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public void test_EOR_SetsAccumulator() {
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bus.loadProgram(0xa9, 0x88, // LDA #$88
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0x49, 0x00, // EOR #$00
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0x49, 0xff, // EOR #$ff
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0x49, 0x33); // EOR #$33
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cpu.step(2);
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assertEquals(0x88, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x77, cpu.getAccumulator());
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cpu.step();
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assertEquals(0x44, cpu.getAccumulator());
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}
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public void test_EOR_SetsArithmeticFlags() {
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bus.loadProgram(0xa9, 0x77, // LDA #$77
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0x49, 0x77, // EOR #$77
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0x49, 0xff); // EOR #$ff
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cpu.step(2);
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assertEquals(0x00, cpu.getAccumulator());
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assertTrue(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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cpu.step();
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assertEquals(0xff, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertTrue(cpu.getNegativeFlag());
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}
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/* ADC Immediate Mode Tests - 0x69 */
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public void test_ADC_SetsAccumulator() {
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bus.loadProgram(0x69, 0x01, // ADC #$01
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0x69, 0xa0, // ADC #$a0
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0x69, 0x02, // ADC #$02
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0x69, 0x06); // ADC #$06
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cpu.step();
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assertEquals(0x01, cpu.getAccumulator());
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cpu.step();
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assertEquals(0xa1, cpu.getAccumulator());
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cpu.step();
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assertEquals(0xa3, cpu.getAccumulator());
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cpu.step();
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assertEquals(0xa9, cpu.getAccumulator());
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}
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public void test_ADC_IncludesCarry() {
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cpu.setCarryFlag(true);
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bus.loadProgram(0x69, 0x01); // ADC #$01
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cpu.step();
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assertEquals(0x02, cpu.getAccumulator());
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}
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public void test_ADC_SetsCarryIfResultCarries() {
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bus.loadProgram(0xa9, 0xff, // LDA #$FE
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0x69, 0x02);
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cpu.step(2);
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assertEquals(0x01, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getOverflowFlag());
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}
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public void test_ADC_SetsOverflowIfResultChangesSign() {
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bus.loadProgram(0xa9, 0x7f, // LDA #$7f
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0x69, 0x01); // ADC #$01
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cpu.step(2);
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assertEquals(0x80, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertFalse(cpu.getCarryFlag());
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assertTrue(cpu.getOverflowFlag());
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cpu.reset();
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bus.loadProgram(0xa9, 0x80, // LDA #$80
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0x69, 0xff); // ADC #$ff
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cpu.step(2);
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assertEquals(0x7f, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getNegativeFlag());
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assertTrue(cpu.getOverflowFlag());
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}
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public void test_ADC_DoesNotSetOverflowIfNotNeeded() {
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bus.loadProgram(0xa9, 0xff, // LDA #$ff
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0x69, 0x01); // ADC #$01
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cpu.step(2);
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assertEquals(0x00, cpu.getAccumulator());
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assertTrue(cpu.getZeroFlag());
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getNegativeFlag());
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assertFalse(cpu.getOverflowFlag());
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cpu.reset();
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bus.loadProgram(0xa9, 0x01, // LDA #$01
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0x69, 0x01); // ADC #$01
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cpu.step(2);
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assertEquals(0x02, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertFalse(cpu.getCarryFlag());
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assertFalse(cpu.getNegativeFlag());
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assertFalse(cpu.getOverflowFlag());
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}
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public void test_ADC_SetsNegativeFlagIfResultIsNegative() {
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bus.loadProgram(0xa9, 0x7f, // LDA #$7F
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0x69, 0x01); // ADC #$01
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cpu.step(2);
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assertEquals(0x80, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertFalse(cpu.getCarryFlag());
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assertTrue(cpu.getNegativeFlag());
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assertTrue(cpu.getOverflowFlag());
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}
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public void test_ADC_SetsZeroFlagIfResultIsZero() {
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bus.loadProgram(0xa9, 0xff, // LDA #$FF
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0x69, 0x01); // ADC #$01
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cpu.step(2);
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assertEquals(0x00, cpu.getAccumulator());
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assertTrue(cpu.getZeroFlag());
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getNegativeFlag());
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assertFalse(cpu.getOverflowFlag());
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}
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public void test_ADC_DoesNotSetNegativeFlagIfResultNotNegative() {
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bus.loadProgram(0xa9, 0x7e, // LDA #$7E
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0x69, 0x01); // ADC #$01
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cpu.step(2);
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assertEquals(0x7f, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertFalse(cpu.getCarryFlag());
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assertFalse(cpu.getNegativeFlag());
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assertFalse(cpu.getOverflowFlag());
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}
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public void test_ADC_DoesNotSetZeroFlagIfResultNotZero() {
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bus.loadProgram(0xa9, 0xff, // LDA #$ff
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0x69, 0x03); // ADC #$03
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cpu.step(2);
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assertEquals(0x2, cpu.getAccumulator());
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assertFalse(cpu.getZeroFlag());
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getNegativeFlag());
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assertFalse(cpu.getOverflowFlag());
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}
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/* LDY Immediate Mode Tests - 0xa0 */
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public void test_LDY_SetsYRegister() {
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bus.loadProgram(0xa0, 0x12); // LDY #$12
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cpu.step();
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assertEquals(0x12, cpu.getYRegister());
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}
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public void test_LDY_SetsZeroFlagIfArgIsZero() {
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bus.loadProgram(0xa0, 0x00); // LDY #$00
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cpu.step();
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assertTrue(cpu.getZeroFlag());
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}
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public void test_LDY_DoesNotSetZeroFlagIfResultNotZero() {
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bus.loadProgram(0xa0, 0x12); // LDY #$12
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cpu.step();
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assertFalse(cpu.getZeroFlag());
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}
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public void test_LDY_SetsNegativeFlagIfResultIsNegative() {
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bus.loadProgram(0xa0, 0x80); // LDY #$80
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cpu.step();
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assertTrue(cpu.getNegativeFlag());
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}
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public void test_LDY_DoesNotSetNegativeFlagIfResultNotNegative() {
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bus.loadProgram(0xa0, 0x7f); // LDY #$7F
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cpu.step();
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assertFalse(cpu.getNegativeFlag());
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}
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/* LDX Immediate Mode Tests - 0xa2 */
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public void test_LDX_SetsXRegister() {
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bus.loadProgram(0xa2, 0x12); // LDX #$12
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cpu.step();
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assertEquals(0x12, cpu.getXRegister());
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}
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public void test_LDX_SetsZeroFlagIfResultIsZero() {
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bus.loadProgram(0xa2, 0x00); // LDX #$00
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cpu.step();
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assertTrue(cpu.getZeroFlag());
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}
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public void test_LDX_DoesNotSetZeroFlagIfResultNotZero() {
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bus.loadProgram(0xa2, 0x12); // LDX #$12
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cpu.step();
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assertFalse(cpu.getZeroFlag());
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}
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public void test_LDX_SetsNegativeFlagIfResultIsNegative() {
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bus.loadProgram(0xa2, 0x80); // LDX #$80
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cpu.step();
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assertTrue(cpu.getNegativeFlag());
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}
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public void test_LDX_DoesNotSetNegativeFlagIfResultNotNegative() {
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bus.loadProgram(0xa2, 0x7f); // LDX #$7F
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cpu.step();
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assertFalse(cpu.getNegativeFlag());
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}
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/* LDA Immediate Mode Tests - 0xa9 */
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public void test_LDA_SetsAccumulator() {
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bus.loadProgram(0xa9, 0x12); // LDA #$12
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cpu.step();
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assertEquals(0x12, cpu.getAccumulator());
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}
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public void test_LDA_SetsZeroFlagIfResultIsZero() {
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bus.loadProgram(0xa9, 0x00); // LDA #$00
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cpu.step();
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assertTrue(cpu.getZeroFlag());
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}
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public void test_LDA_DoesNotSetZeroFlagIfResultNotZero() {
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bus.loadProgram(0xa9, 0x12); // LDA #$12
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cpu.step();
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assertFalse(cpu.getZeroFlag());
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}
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public void test_LDA_SetsNegativeFlagIfResultIsNegative() {
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bus.loadProgram(0xa9, 0x80); // LDA #$80
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cpu.step();
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assertTrue(cpu.getNegativeFlag());
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}
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public void test_LDA_DoesNotSetNegativeFlagIfResultNotNegative() {
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bus.loadProgram(0xa9, 0x7f); // LDA #$7F
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cpu.step();
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assertFalse(cpu.getNegativeFlag());
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}
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/* CPY Immediate Mode Tests - 0xc0 */
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public void test_CPY_SetsZeroAndCarryFlagsIfNumbersSame() {
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bus.loadProgram(0xa0, 0x00, // LDY #$00
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0xc0, 0x00); // CPY #$00
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertTrue(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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cpu.reset();
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bus.loadProgram(0xa0, 0x01, // LDY #$01
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0xc0, 0x01); // CPY #$01
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertTrue(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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cpu.reset();
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bus.loadProgram(0xa0, 0x7f, // LDY #$7F
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0xc0, 0x7f); // CPY #$7F
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertTrue(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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cpu.reset();
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bus.loadProgram(0xa0, 0xFF, // LDY #$FF
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0xc0, 0xFF); // CPY #$FF
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertTrue(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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}
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public void test_CPY_SetsCarryFlagIfYGreaterThanMemory() {
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bus.loadProgram(0xa0, 0x0a, // LDY #$0A
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0xc0, 0x08); // CPY #$08
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getZeroFlag());
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// $08 - $0a = negative
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assertTrue(cpu.getNegativeFlag());
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cpu.reset();
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bus.loadProgram(0xa0, 0xfa, // LDY #$FA
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0xc0, 0x80); // CPY #$80
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertFalse(cpu.getZeroFlag());
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// $80 - $FA = negative
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assertTrue(cpu.getNegativeFlag());
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}
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public void test_CPY_DoesNotSetCarryFlagIfYGreaterThanMemory() {
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bus.loadProgram(0xa0, 0x08, // LDY #$08
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0xc0, 0x0a); // CPY #$0A
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cpu.step(2);
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assertFalse(cpu.getCarryFlag());
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assertFalse(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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cpu.reset();
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bus.loadProgram(0xa0, 0x70, // LDY #$70
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0xc0, 0x80); // CPY #$80
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cpu.step(2);
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assertFalse(cpu.getCarryFlag());
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assertFalse(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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}
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/* CMP Immediate Mode Tests - 0xc9 */
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public void test_CMP_SetsZeroAndCarryFlagsIfNumbersSame() {
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bus.loadProgram(0xa9, 0x00, // LDA #$00
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0xc9, 0x00); // CMP #$00
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cpu.step(2);
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assertTrue(cpu.getCarryFlag());
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assertTrue(cpu.getZeroFlag());
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assertFalse(cpu.getNegativeFlag());
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cpu.reset();
|
||||
bus.loadProgram(0xa9, 0x01, // LDA #$01
|
||||
0xc9, 0x01); // CMP #$01
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa9, 0x7f, // LDA #$7F
|
||||
0xc9, 0x7f); // CMP #$7F
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa9, 0xFF, // LDA #$FF
|
||||
0xc9, 0xFF); // CMP #$FF
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
}
|
||||
|
||||
public void test_CMP_SetsCarryFlagIfYGreaterThanMemory() {
|
||||
bus.loadProgram(0xa9, 0x0a, // LDA #$0A
|
||||
0xc9, 0x08); // CMP #$08
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
// $08 - $0a = negative
|
||||
assertTrue(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa9, 0xfa, // LDA #$FA
|
||||
0xc9, 0x80); // CMP #$80
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
// $80 - $FA = negative
|
||||
assertTrue(cpu.getNegativeFlag());
|
||||
}
|
||||
|
||||
public void test_CMP_DoesNotSetCarryFlagIfYGreaterThanMemory() {
|
||||
bus.loadProgram(0xa9, 0x08, // LDA #$08
|
||||
0xc9, 0x0a); // CMP #$0A
|
||||
cpu.step(2);
|
||||
assertFalse(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa9, 0x70, // LDA #$70
|
||||
0xc9, 0x80); // CMP #$80
|
||||
cpu.step(2);
|
||||
assertFalse(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
}
|
||||
|
||||
/* CPX Immediate Mode Tests - 0xe0 */
|
||||
|
||||
public void test_CPX_SetsZeroAndCarryFlagsIfNumbersSame() {
|
||||
bus.loadProgram(0xa2, 0x00, // LDX #$00
|
||||
0xe0, 0x00); // CPX #$00
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa2, 0x01, // LDX #$01
|
||||
0xe0, 0x01); // CPX #$01
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa2, 0x7f, // LDX #$7F
|
||||
0xe0, 0x7f); // CPX #$7F
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa2, 0xFF, // LDX #$FF
|
||||
0xe0, 0xFF); // CPX #$FF
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertTrue(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
}
|
||||
|
||||
public void test_CPX_SetsCarryFlagIfYGreaterThanMemory() {
|
||||
bus.loadProgram(0xa2, 0x0a, // LDX #$0A
|
||||
0xe0, 0x08); // CPX #$08
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
// $08 - $0a = negative
|
||||
assertTrue(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa2, 0xfa, // LDX #$FA
|
||||
0xe0, 0x80); // CPX #$80
|
||||
cpu.step(2);
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
// $80 - $FA = negative
|
||||
assertTrue(cpu.getNegativeFlag());
|
||||
}
|
||||
|
||||
public void test_CPX_DoesNotSetCarryFlagIfYGreaterThanMemory() {
|
||||
bus.loadProgram(0xa2, 0x08, // LDX #$08
|
||||
0xe0, 0x0a); // CPX #$0A
|
||||
cpu.step(2);
|
||||
assertFalse(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
|
||||
cpu.reset();
|
||||
bus.loadProgram(0xa2, 0x70, // LDX #$70
|
||||
0xe0, 0x80); // CMX #$80
|
||||
cpu.step(2);
|
||||
assertFalse(cpu.getCarryFlag());
|
||||
assertFalse(cpu.getZeroFlag());
|
||||
assertFalse(cpu.getNegativeFlag());
|
||||
}
|
||||
|
||||
/* SBC Immediate Mode Tests - 0xe9 */
|
||||
|
||||
public void test_SBC_SetsAccumulator() {
|
||||
bus.loadProgram(0xa9, 0xff, // LDA #$FF
|
||||
0xe9, 0x01, // SBC #$01
|
||||
0xe9, 0x01, // SBC #$a0
|
||||
0xe9, 0x01, // SBC #$02
|
||||
0xe9, 0x01); // SBC #$06
|
||||
|
||||
assertFalse(cpu.getCarryFlag());
|
||||
cpu.step(2);
|
||||
assertEquals(0xfd, cpu.getAccumulator());
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
|
||||
cpu.step();
|
||||
assertEquals(0xfc, cpu.getAccumulator());
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
|
||||
cpu.step();
|
||||
assertEquals(0xfb, cpu.getAccumulator());
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
|
||||
cpu.step();
|
||||
assertEquals(0xfa, cpu.getAccumulator());
|
||||
assertTrue(cpu.getCarryFlag());
|
||||
}
|
||||
|
||||
}
|
||||
Reference in new issue
Block a user