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Implemented boolean immediate mode instructions.

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sethm committed 2008-12-14 01:09:23 -08:00
1 parent 3f74489757
commit 1c6c5fdaeb
4 files changed
+368 -152
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src/test/java/com/loomcom/symon/CpuImmediateModeTests.java
+313
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@@ -0,0 +1,313 @@
package com.loomcom.symon;
import com.loomcom.symon.devices.Memory;
import com.loomcom.symon.exceptions.MemoryRangeException;
import junit.framework.TestCase;
public class CpuImmediateModeTests extends TestCase {
private Cpu cpu;
private Bus bus;
private Memory mem;
public void setUp() throws MemoryRangeException {
this.cpu = new Cpu();
this.bus = new Bus(0x0000, 0xffff);
this.mem = new Memory(0x0000, 0x10000);
bus.addCpu(cpu);
bus.addDevice(mem);
// All test programs start at 0x0200;
bus.write(0xfffc, 0x00);
bus.write(0xfffd, 0x02);
cpu.reset();
}
/* ORA Immediate Mode Tests - 0x09 */
public void test_ORA_SetsAccumulator() {
bus.write(0x0200, 0x09); // ORA #$00
bus.write(0x0201, 0x00);
cpu.step();
// 0x00 | 0x00 == 0x00
assertEquals(0x00, cpu.getAccumulator());
bus.write(0x0202, 0x09); // ORA #$11
bus.write(0x0203, 0x11);
cpu.step();
// 0x00 | 0x11 == 0x11
assertEquals(0x11, cpu.getAccumulator());
bus.write(0x0204, 0x09); // ORA #$22
bus.write(0x0205, 0x22);
cpu.step();
// 0x11 | 0x22 == 0x33
assertEquals(0x33, cpu.getAccumulator());
bus.write(0x0206, 0x09); // ORA #$44
bus.write(0x0207, 0x44);
cpu.step();
// 0x33 | 0x44 == 0x77
assertEquals(0x77, cpu.getAccumulator());
bus.write(0x0208, 0x09); // ORA #$88
bus.write(0x0209, 0x88);
cpu.step();
// 0x77 | 0x88 == 0xFF
assertEquals(0xff, cpu.getAccumulator());
}
public void test_ORA_SetsZeroFlagIfResultIsZero() {
bus.write(0x0200, 0x09); // ORA #$00
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_ORA_DoesNotSetZeroFlagIfResultNotZero() {
bus.write(0x0200, 0x09); // ORA #$01
bus.write(0x0201, 0x01);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_ORA_SetsNegativeFlagIfResultIsNegative() {
bus.write(0x0200, 0x09); // ORA #$80
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_ORA_DoesNotSetNegativeFlagIfResultNotNegative() {
bus.write(0x0200, 0x09); // ORA #$7F
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* AND Immediate Mode Tests - 0x29 */
public void test_AND_SetsAccumulator() {
bus.write(0x0200, 0x29); // AND #$00
bus.write(0x0201, 0x00);
cpu.step();
// 0x00 & 0x00 == 0x00
assertEquals(0x00, cpu.getAccumulator());
bus.write(0x0202, 0x29); // AND #$FF
bus.write(0x0203, 0x11);
cpu.step();
// 0x00 & 0xff == 0x00
assertEquals(0x00, cpu.getAccumulator());
// Load Accumulator with AA - %10101010
bus.write(0x0204, 0xa9); // LDA #$AA
bus.write(0x0205, 0xaa);
cpu.step();
bus.write(0x0206, 0x29); // AND #$FF
bus.write(0x0207, 0xff);
cpu.step();
// 0xaa & 0xff == 0xaa
assertEquals(0xaa, cpu.getAccumulator());
bus.write(0x0208, 0x29); // AND #$99
bus.write(0x0209, 0x99);
cpu.step();
// 0xaa & 0x99 == 0x88
assertEquals(0x88, cpu.getAccumulator());
bus.write(0x020a, 0x29); // AND #$99
bus.write(0x020b, 0x11);
cpu.step();
// 0x88 & 0x11 == 0x00
assertEquals(0x00, cpu.getAccumulator());
}
public void test_AND_SetsZeroFlagIfResultIsZero() {
bus.write(0x0200, 0xa9); // LDA #$88
bus.write(0x0201, 0x88);
cpu.step();
bus.write(0x0202, 0x29); // AND #$11
bus.write(0x0203, 0x11);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_AND_DoesNotSetZeroFlagIfResultNotZero() {
bus.write(0x0200, 0xa9); // LDA #$88
bus.write(0x0201, 0x88);
cpu.step();
bus.write(0x0202, 0x29); // AND #$f1
bus.write(0x0203, 0xf1);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_AND_SetsNegativeFlagIfResultIsNegative() {
bus.write(0x0200, 0xa9); // LDA #$88
bus.write(0x0201, 0x88);
cpu.step();
bus.write(0x0202, 0x29); // AND #$F0
bus.write(0x0203, 0xf0);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_AND_DoesNotSetNegativeFlagIfResultNotNegative() {
bus.write(0x0200, 0xa9); // LDA #$88
bus.write(0x0201, 0x88);
cpu.step();
bus.write(0x0202, 0x29); // AND #$0F
bus.write(0x0203, 0x0f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* EOR Immediate Mode Tests - 0x49 */
public void test_EOR_SetsAccumulator() {
bus.write(0x0200, 0xa9); // LDA #$88
bus.write(0x0201, 0x88);
cpu.step();
bus.write(0x0202, 0x49); // EOR #$00
bus.write(0x0203, 0x00);
cpu.step();
assertEquals(0x88, cpu.getAccumulator());
bus.write(0x0204, 0x49); // EOR #$ff
bus.write(0x0205, 0xff);
cpu.step();
assertEquals(0x77, cpu.getAccumulator());
bus.write(0x0206, 0x49); // EOR #$33
bus.write(0x0207, 0x33);
cpu.step();
assertEquals(0x44, cpu.getAccumulator());
}
/* ADC Immediate Mode Tests - 0x69 */
/* LDY Immediate Mode Tests - 0xa0 */
public void test_LDY_SetsYRegister() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x12);
cpu.step();
assertEquals(0x12, cpu.getYRegister());
}
public void test_LDY_SetsZeroFlagIfArgIsZero() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_LDY_DoesNotSetZeroFlagIfResultNotZero() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x12);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_LDY_SetsNegativeFlagIfResultIsNegative() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_LDY_DoesNotSetNegativeFlagIfResultNotNegative() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* LDX Immediate Mode Tests - 0xa2 */
public void test_LDX_SetsXRegister() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x12);
cpu.step();
assertEquals(0x12, cpu.getXRegister());
}
public void test_LDX_SetsZeroFlagIfResultIsZero() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_LDX_DoesNotSetZeroFlagIfResultNotZero() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x12);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_LDX_SetsNegativeFlagIfResultIsNegative() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_LDX_DoesNotSetNegativeFlagIfResultNotNegative() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* LDA Immediate Mode Tests - 0xa9 */
public void test_LDA_SetsAccumulator() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x12);
cpu.step();
assertEquals(0x12, cpu.getAccumulator());
}
public void test_LDA_SetsZeroFlagIfResultIsZero() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_LDA_DoesNotSetZeroFlagIfResultNotZero() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x12);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_LDA_SetsNegativeFlagIfResultIsNegative() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_LDA_DoesNotSetNegativeFlagIfResultNotNegative() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* CPY Immediate Mode Tests - 0xc0 */
/* CMP Immediate Mode Tests - 0xc9 */
/* CPX Immediate Mode Tests - 0xe0 */
/* SBC Immediate Mode Tests - 0xe9 */
}
src/test/java/com/loomcom/symon/CpuTest.java
+2 -113
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@@ -9,7 +9,7 @@ import com.loomcom.symon.exceptions.*;
*
*/
public class CpuTest extends TestCase {
private Cpu cpu;
private Bus bus;
private Memory mem;
@@ -27,7 +27,7 @@ public class CpuTest extends TestCase {
this.bus = new Bus(0x0000, 0xffff);
this.mem = new Memory(0x0000, 0x10000);
bus.addCpu(cpu);
bus.addDevice(new Memory(0x0000, 0x10000));
bus.addDevice(mem);
// All test programs start at 0x0200;
bus.write(0xfffc, 0x00);
@@ -49,115 +49,4 @@ public class CpuTest extends TestCase {
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getNegativeFlag());
}
/* LDA Immediate Mode Tests - 0xa9 */
public void test_LDA_IMM_SetsAccumulator() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x12);
cpu.step();
assertEquals(0x12, cpu.getAccumulator());
}
public void test_LDA_IMM_SetsZeroFlagIfArgIsZero() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_LDA_IMM_DoesNotSetZeroFlagIfArgNotZero() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x12);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_LDA_IMM_SetsNegativeFlagIfArgIsNegative() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_LDA_IMM_DoesNotSetNegativeFlagIfArgNotNegative() {
bus.write(0x0200, 0xa9);
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* LDX Immediate Mode Tests - 0xa2 */
public void test_LDX_IMM_SetsXRegister() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x12);
cpu.step();
assertEquals(0x12, cpu.getXRegister());
}
public void test_LDX_IMM_SetsZeroFlagIfArgIsZero() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_LDX_IMM_DoesNotSetZeroFlagIfArgNotZero() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x12);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_LDX_IMM_SetsNegativeFlagIfArgIsNegative() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_LDX_IMM_DoesNotSetNegativeFlagIfArgNotNegative() {
bus.write(0x0200, 0xa2);
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
/* LDY Immediate Mode Tests - 0xa0 */
public void test_LDY_IMM_SetsYRegister() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x12);
cpu.step();
assertEquals(0x12, cpu.getYRegister());
}
public void test_LDY_IMM_SetsZeroFlagIfArgIsZero() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x00);
cpu.step();
assertTrue(cpu.getZeroFlag());
}
public void test_LDY_IMM_DoesNotSetZeroFlagIfArgNotZero() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x12);
cpu.step();
assertFalse(cpu.getZeroFlag());
}
public void test_LDY_IMM_SetsNegativeFlagIfArgIsNegative() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x80);
cpu.step();
assertTrue(cpu.getNegativeFlag());
}
public void test_LDY_IMM_DoesNotSetNegativeFlagIfArgNotNegative() {
bus.write(0x0200, 0xa0);
bus.write(0x0201, 0x7f);
cpu.step();
assertFalse(cpu.getNegativeFlag());
}
}