public_mirrors/symon
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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/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());
}
}