RuiFPB/ksymon
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Fixed the BRK instruction. Added SBC and ADC in Binary Coded Decimal

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mode.  More unit tests.
This commit is contained in:
Seth J. Morabito committed 2008-12-26 02:13:11 -08:00
1 parent b46c4e1bec
commit 06ed74e89c
3 files changed
+299 -45
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src/test/java/com/loomcom/symon/CpuImmediateModeTest.java
+109
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@@ -252,6 +252,83 @@ public class CpuImmediateModeTest extends TestCase {
assertFalse(cpu.getCarryFlag());
}
public void test_ADC_DecimalMode() {
bus.loadProgram(0xf8, // SED
0xa9, 0x01, // LDA #$01
0x69, 0x01); // ADC #$01
cpu.step(3);
assertEquals(0x02, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getCarryFlag());
cpu.reset();
bus.loadProgram(0xf8, // SED
0xa9, 0x49, // LDA #$49
0x69, 0x01); // ADC #$01
cpu.step(3);
assertEquals(0x50, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getCarryFlag());
cpu.reset();
bus.loadProgram(0xf8, // SED
0xa9, 0x50, // LDA #$50
0x69, 0x01); // ADC #$01
cpu.step(3);
assertEquals(0x51, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getCarryFlag());
cpu.reset();
bus.loadProgram(0xf8, // SED
0xa9, 0x99, // LDA #$99
0x69, 0x01); // ADC #$01
cpu.step(3);
assertEquals(0x00, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertTrue(cpu.getZeroFlag());
assertTrue(cpu.getCarryFlag());
cpu.reset();
bus.loadProgram(0xf8, // SED
0xa9, 0x00, // LDA #$00
0x69, 0x99); // ADC #$01
cpu.step(3);
assertEquals(0x99, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getCarryFlag());
cpu.reset();
bus.loadProgram(0xf8, // SED
0xa9, 0x49, // LDA #$49
0x69, 0x99); // ADC #$99
cpu.step(3);
assertEquals(0x48, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getCarryFlag());
cpu.reset();
bus.loadProgram(0xf8, // SED
0xa9, 0x50, // LDA #$59
0x69, 0x99); // ADC #$99
cpu.step(3);
assertEquals(0x49, cpu.getAccumulator());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getOverflowFlag());
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getCarryFlag());
}
/* LDY Immediate Mode Tests - 0xa0 */
@@ -616,11 +693,43 @@ public class CpuImmediateModeTest extends TestCase {
}
public void test_SBC_IncludesNotOfCarry() {
// Subtrace with Carry Flag cleared
bus.loadProgram(0x18, // CLC
0xa9, 0x05, // LDA #$00
0xe9, 0x01); // SBC #$01
cpu.step(3);
assertEquals(0x03, cpu.getAccumulator());
cpu.reset();
// Subtrace with Carry Flag cleared
bus.loadProgram(0x18, // CLC
0xa9, 0x00, // LDA #$00
0xe9, 0x01); // SBC #$01
cpu.step(3);
assertEquals(0xfe, cpu.getAccumulator());
cpu.reset();
// Subtract with Carry Flag set
bus.loadProgram(0x38, // SEC
0xa9, 0x05, // LDA #$00
0xe9, 0x01); // SBC #$01
cpu.step(3);
assertEquals(0x04, cpu.getAccumulator());
assertTrue(cpu.getCarryFlag());
cpu.reset();
// Subtract with Carry Flag set
bus.loadProgram(0x38, // SEC
0xa9, 0x00, // LDA #$00
0xe9, 0x01); // SBC #$01
cpu.step(3);
assertEquals(0xff, cpu.getAccumulator());
assertFalse(cpu.getCarryFlag());
}
}