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Issue #16: Memory window should not reset device registers

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This commit is contained in:
Matt Harlum committed 2017-05-26 17:01:41 +10:00
1 parent 9cdd718e8d
commit 96819f1bf7
26 files changed
+355 -318
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src/test/java/com/loomcom/symon/AciaTest.java
+47 -13
View File
@@ -55,7 +55,7 @@ public class AciaTest {
verify(mockBus, never()).assertIrq();
// Transmission should cause IRQ
acia.txRead();
acia.txRead(true);
verify(mockBus, atLeastOnce()).assertIrq();
}
@@ -74,7 +74,7 @@ public class AciaTest {
acia.write(0, 'a');
// Transmission should cause IRQ
acia.txRead();
acia.txRead(true);
verify(mockBus, never()).assertIrq();
}
@@ -83,7 +83,7 @@ public class AciaTest {
public void newAciaShouldHaveTxEmptyStatus() throws Exception {
Acia acia = new Acia6551(0x000);
assertEquals(0x10, acia.read(0x0001));
assertEquals(0x10, acia.read(0x0001, true));
}
@Test
@@ -91,7 +91,7 @@ public class AciaTest {
Acia acia = new Acia6551(0x000);
acia.txWrite('a');
assertEquals(0x00, acia.read(0x0001));
assertEquals(0x00, acia.read(0x0001, true));
}
@Test
@@ -99,7 +99,7 @@ public class AciaTest {
Acia acia = new Acia6551(0x000);
acia.rxWrite('a');
assertEquals(0x18, acia.read(0x0001));
assertEquals(0x18, acia.read(0x0001, true));
}
@Test
@@ -110,7 +110,7 @@ public class AciaTest {
acia.rxWrite('a');
acia.txWrite('b');
assertEquals(0x08, acia.read(0x0001));
assertEquals(0x08, acia.read(0x0001, true));
}
@Test
@@ -123,14 +123,31 @@ public class AciaTest {
acia.rxWrite('a');
acia.rxWrite('b');
assertEquals(0x04, acia.read(0x0001) & 0x04);
assertEquals(0x04, acia.read(0x0001, true) & 0x04);
// read should reset
acia.rxRead();
assertEquals(0x00, acia.read(0x0001) & 0x04);
acia.rxRead(true);
assertEquals(0x00, acia.read(0x0001, true) & 0x04);
}
@Test
public void aciaShouldOverrunAndMemoryWindowReadShouldNotReset()
throws Exception {
Acia acia = new Acia6551(0x0000);
// overrun ACIA
acia.rxWrite('a');
acia.rxWrite('b');
assertEquals(0x04, acia.read(0x0001, true) & 0x04);
// memory window read should not reset
acia.rxRead(false);
assertEquals(0x04, acia.read(0x0001, true) & 0x04);
}
@Test
public void readingBuffersShouldResetStatus()
@@ -141,11 +158,28 @@ public class AciaTest {
acia.txWrite('b');
assertEquals(0x08, acia.read(0x0001));
assertEquals(0x08, acia.read(0x0001, true));
assertEquals('a', acia.rxRead());
assertEquals('b', acia.txRead());
assertEquals('a', acia.rxRead(true));
assertEquals('b', acia.txRead(true));
assertEquals(0x10, acia.read(0x0001));
assertEquals(0x10, acia.read(0x0001, true));
}
@Test
public void A()
throws Exception {
Acia acia = new Acia6551(0x0000);
acia.rxWrite('a');
acia.txWrite('b');
assertEquals(0x08, acia.read(0x0001, true));
assertEquals('a', acia.rxRead(false));
assertEquals('b', acia.txRead(false));
assertEquals(0x08, acia.read(0x0001, true));
}
}
src/test/java/com/loomcom/symon/AciaTest6850.java
+13 -13
View File
@@ -67,7 +67,7 @@ public class AciaTest6850 {
verify(mockBus, never()).assertIrq();
// Transmission should cause IRQ
acia.txRead();
acia.txRead(true);
verify(mockBus, atLeastOnce()).assertIrq();
}
@@ -86,7 +86,7 @@ public class AciaTest6850 {
acia.write(DATA_REG, 'a');
// Transmission should cause IRQ
acia.txRead();
acia.txRead(true);
verify(mockBus, never()).assertIrq();
}
@@ -95,7 +95,7 @@ public class AciaTest6850 {
public void newAciaShouldHaveTxEmptyStatus() throws Exception {
Acia acia = newAcia();
assertEquals(0x02, acia.read(CMD_STAT_REG) & 0x02);
assertEquals(0x02, acia.read(CMD_STAT_REG, true) & 0x02);
}
@Test
@@ -103,7 +103,7 @@ public class AciaTest6850 {
Acia acia = newAcia();
acia.txWrite('a');
assertEquals(0x00, acia.read(CMD_STAT_REG) & 0x02);
assertEquals(0x00, acia.read(CMD_STAT_REG, true) & 0x02);
}
@Test
@@ -112,7 +112,7 @@ public class AciaTest6850 {
acia.rxWrite('a');
assertEquals(0x01, acia.read(CMD_STAT_REG) & 0x01);
assertEquals(0x01, acia.read(CMD_STAT_REG, true) & 0x01);
}
@Test
@@ -123,7 +123,7 @@ public class AciaTest6850 {
acia.rxWrite('a');
acia.txWrite('b');
assertEquals(0x01, acia.read(CMD_STAT_REG) & 0x03);
assertEquals(0x01, acia.read(CMD_STAT_REG, true) & 0x03);
}
@Test
@@ -136,11 +136,11 @@ public class AciaTest6850 {
acia.rxWrite('a');
acia.rxWrite('b');
assertEquals(0x20, acia.read(CMD_STAT_REG) & 0x20);
assertEquals(0x20, acia.read(CMD_STAT_REG, true) & 0x20);
// read should reset
acia.rxRead();
assertEquals(0x00, acia.read(CMD_STAT_REG) & 0x20);
acia.rxRead(true);
assertEquals(0x00, acia.read(CMD_STAT_REG, true) & 0x20);
}
@@ -149,15 +149,15 @@ public class AciaTest6850 {
throws Exception {
Acia acia = newAcia();
assertEquals(0x00, acia.read(CMD_STAT_REG) & 0x01);
assertEquals(0x00, acia.read(CMD_STAT_REG, true) & 0x01);
acia.rxWrite('a');
assertEquals(0x01, acia.read(CMD_STAT_REG) & 0x01);
assertEquals(0x01, acia.read(CMD_STAT_REG, true) & 0x01);
acia.rxRead();
acia.rxRead(true);
assertEquals(0x00, acia.read(CMD_STAT_REG) & 0x01);
assertEquals(0x00, acia.read(CMD_STAT_REG, true) & 0x01);
}
}
src/test/java/com/loomcom/symon/CpuAbsoluteModeTest.java
+49 -49
View File
@@ -121,31 +121,31 @@ public class CpuAbsoluteModeTest extends TestCase {
0x0e, 0x04, 0x12); // ASL $1204
cpu.step();
assertEquals(0x00, bus.read(0x7f00));
assertEquals(0x00, bus.read(0x7f00, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x7f01));
assertEquals(0x02, bus.read(0x7f01, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x3502));
assertEquals(0x04, bus.read(0x3502, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x88, bus.read(0x3503));
assertEquals(0x88, bus.read(0x3503, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x1204));
assertEquals(0x00, bus.read(0x1204, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
@@ -165,8 +165,8 @@ public class CpuAbsoluteModeTest extends TestCase {
// Old PC-1 should be on stack (i.e.: address of third byte of the
// JSR instruction, 0x0204)
assertEquals(0x02, bus.read(0x1ff));
assertEquals(0x04, bus.read(0x1fe));
assertEquals(0x02, bus.read(0x1ff, true));
assertEquals(0x04, bus.read(0x1fe, true));
// No flags should have changed.
assertEquals(0x20, cpu.getProcessorStatus());
@@ -295,61 +295,61 @@ public class CpuAbsoluteModeTest extends TestCase {
0x2e, 0x01, 0x12); // ROL $1201 (m=%10000001, c=0)
cpu.step();
assertEquals(0x00, bus.read(0x1200));
assertEquals(0x00, bus.read(0x1200, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x1201));
assertEquals(0x02, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step(2);
assertEquals(0x05, bus.read(0x1201));
assertEquals(0x05, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x0a, bus.read(0x1201));
assertEquals(0x0a, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x14, bus.read(0x1201));
assertEquals(0x14, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x28, bus.read(0x1201));
assertEquals(0x28, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x50, bus.read(0x1201));
assertEquals(0x50, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0xa0, bus.read(0x1201));
assertEquals(0xa0, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x1201));
assertEquals(0x40, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x81, bus.read(0x1201));
assertEquals(0x81, bus.read(0x1201, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -418,38 +418,38 @@ public class CpuAbsoluteModeTest extends TestCase {
0x4e, 0x05, 0x12); // LSR $1205
cpu.step();
assertEquals(0x00, bus.read(0x1200));
assertEquals(0x00, bus.read(0x1200, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x1201));
assertEquals(0x00, bus.read(0x1201, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0x1202));
assertEquals(0x01, bus.read(0x1202, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x22, bus.read(0x1203));
assertEquals(0x22, bus.read(0x1203, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x1204));
assertEquals(0x40, bus.read(0x1204, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
// Setting Carry should not affect the result.
cpu.step(2);
assertEquals(0x01, bus.read(0x1205));
assertEquals(0x01, bus.read(0x1205, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -654,61 +654,61 @@ public class CpuAbsoluteModeTest extends TestCase {
0x6e, 0x11, 0x12); // ROR $1201 (m=%00010000, c=0)
cpu.step();
assertEquals(0x00, bus.read(0x1210));
assertEquals(0x00, bus.read(0x1210, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x08, bus.read(0x1211));
assertEquals(0x08, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x1211));
assertEquals(0x04, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x1211));
assertEquals(0x02, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0x1211));
assertEquals(0x01, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x1211));
assertEquals(0x00, bus.read(0x1211, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x80, bus.read(0x1211));
assertEquals(0x80, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x1211));
assertEquals(0x40, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x20, bus.read(0x1211));
assertEquals(0x20, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x10, bus.read(0x1211));
assertEquals(0x10, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -720,7 +720,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setYRegister(0x00);
bus.loadProgram(0x8c, 0x10, 0x12);
cpu.step();
assertEquals(0x00, bus.read(0x1210));
assertEquals(0x00, bus.read(0x1210, true));
// STY should have NO effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -730,7 +730,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setYRegister(0x0f);
bus.loadProgram(0x8c, 0x10, 0x12);
cpu.step();
assertEquals(0x0f, bus.read(0x1210));
assertEquals(0x0f, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -739,7 +739,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setYRegister(0x80);
bus.loadProgram(0x8c, 0x10, 0x12);
cpu.step();
assertEquals(0x80, bus.read(0x1210));
assertEquals(0x80, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -750,7 +750,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setAccumulator(0x00);
bus.loadProgram(0x8d, 0x10, 0x12);
cpu.step();
assertEquals(0x00, bus.read(0x1210));
assertEquals(0x00, bus.read(0x1210, true));
// STA should have NO effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -760,7 +760,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setAccumulator(0x0f);
bus.loadProgram(0x8d, 0x10, 0x12);
cpu.step();
assertEquals(0x0f, bus.read(0x1210));
assertEquals(0x0f, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -769,7 +769,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setAccumulator(0x80);
bus.loadProgram(0x8d, 0x10, 0x12);
cpu.step();
assertEquals(0x80, bus.read(0x1210));
assertEquals(0x80, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -780,7 +780,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setXRegister(0x00);
bus.loadProgram(0x8e, 0x10, 0x12);
cpu.step();
assertEquals(0x00, bus.read(0x1210));
assertEquals(0x00, bus.read(0x1210, true));
// STX should have NO effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -790,7 +790,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setXRegister(0x0f);
bus.loadProgram(0x8e, 0x10, 0x12);
cpu.step();
assertEquals(0x0f, bus.read(0x1210));
assertEquals(0x0f, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -799,7 +799,7 @@ public class CpuAbsoluteModeTest extends TestCase {
cpu.setXRegister(0x80);
bus.loadProgram(0x8e, 0x10, 0x12);
cpu.step();
assertEquals(0x80, bus.read(0x1210));
assertEquals(0x80, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -957,22 +957,22 @@ public class CpuAbsoluteModeTest extends TestCase {
0xce, 0x13, 0x12); // DEC $1213
cpu.step();
assertEquals(0xff, bus.read(0x1210));
assertEquals(0xff, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0x1211));
assertEquals(0x00, bus.read(0x1211, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x7f, bus.read(0x1212));
assertEquals(0x7f, bus.read(0x1212, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0xfe, bus.read(0x1213));
assertEquals(0xfe, bus.read(0x1213, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
}
@@ -1213,17 +1213,17 @@ public class CpuAbsoluteModeTest extends TestCase {
0xee, 0x12, 0x12); // INC $1212
cpu.step();
assertEquals(0x01, bus.read(0x1210));
assertEquals(0x01, bus.read(0x1210, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x80, bus.read(0x1211));
assertEquals(0x80, bus.read(0x1211, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0x1212));
assertEquals(0x00, bus.read(0x1212, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
src/test/java/com/loomcom/symon/CpuAbsoluteXModeTest.java
+41 -41
View File
@@ -117,31 +117,31 @@ public class CpuAbsoluteXModeTest extends TestCase {
0x1e, 0x04, 0x2c); // ASL $2c04,X
cpu.step();
assertEquals(0x00, bus.read(0x2c30));
assertEquals(0x00, bus.read(0x2c30, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x2c31));
assertEquals(0x02, bus.read(0x2c31, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x2c32));
assertEquals(0x04, bus.read(0x2c32, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x88, bus.read(0x2c33));
assertEquals(0x88, bus.read(0x2c33, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x2c34));
assertEquals(0x00, bus.read(0x2c34, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
@@ -229,61 +229,61 @@ public class CpuAbsoluteXModeTest extends TestCase {
0x3e, 0x01, 0x10); // ROL $1001,X (m=%10000001, c=0)
cpu.step();
assertEquals(0x00, bus.read(0x1070));
assertEquals(0x00, bus.read(0x1070, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x1071));
assertEquals(0x02, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step(2);
assertEquals(0x05, bus.read(0x1071));
assertEquals(0x05, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x0a, bus.read(0x1071));
assertEquals(0x0a, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x14, bus.read(0x1071));
assertEquals(0x14, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x28, bus.read(0x1071));
assertEquals(0x28, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x50, bus.read(0x1071));
assertEquals(0x50, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0xa0, bus.read(0x1071));
assertEquals(0xa0, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x1071));
assertEquals(0x40, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x81, bus.read(0x1071));
assertEquals(0x81, bus.read(0x1071, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -346,38 +346,38 @@ public class CpuAbsoluteXModeTest extends TestCase {
0x5e, 0x05, 0xab); // LSR $ab05,X
cpu.step();
assertEquals(0x00, bus.read(0xab30));
assertEquals(0x00, bus.read(0xab30, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0xab31));
assertEquals(0x00, bus.read(0xab31, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0xab32));
assertEquals(0x01, bus.read(0xab32, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x22, bus.read(0xab33));
assertEquals(0x22, bus.read(0xab33, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0xab34));
assertEquals(0x40, bus.read(0xab34, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
// Setting Carry should not affect the result.
cpu.step(2);
assertEquals(0x01, bus.read(0xab35));
assertEquals(0x01, bus.read(0xab35, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -609,61 +609,61 @@ public class CpuAbsoluteXModeTest extends TestCase {
cpu.setXRegister(0x30);
cpu.step();
assertEquals(0x00, bus.read(0xab40));
assertEquals(0x00, bus.read(0xab40, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x08, bus.read(0xab41));
assertEquals(0x08, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0xab41));
assertEquals(0x04, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0xab41));
assertEquals(0x02, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0xab41));
assertEquals(0x01, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0xab41));
assertEquals(0x00, bus.read(0xab41, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x80, bus.read(0xab41));
assertEquals(0x80, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0xab41));
assertEquals(0x40, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x20, bus.read(0xab41));
assertEquals(0x20, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x10, bus.read(0xab41));
assertEquals(0x10, bus.read(0xab41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -677,7 +677,7 @@ public class CpuAbsoluteXModeTest extends TestCase {
cpu.setAccumulator(0x00);
bus.loadProgram(0x9d, 0x10, 0xab); // STA $ab10,X
cpu.step();
assertEquals(0x00, bus.read(0xab40));
assertEquals(0x00, bus.read(0xab40, true));
// STA should have NO affect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -688,7 +688,7 @@ public class CpuAbsoluteXModeTest extends TestCase {
cpu.setAccumulator(0x0f);
bus.loadProgram(0x9d, 0x10, 0xab); // STA $ab10,X
cpu.step();
assertEquals(0x0f, bus.read(0xab40));
assertEquals(0x0f, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -698,7 +698,7 @@ public class CpuAbsoluteXModeTest extends TestCase {
cpu.setAccumulator(0x80);
bus.loadProgram(0x9d, 0x10, 0xab); // STA $ab10,X
cpu.step();
assertEquals(0x80, bus.read(0xab40));
assertEquals(0x80, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -808,22 +808,22 @@ public class CpuAbsoluteXModeTest extends TestCase {
cpu.setXRegister(0x30);
cpu.step();
assertEquals(0xff, bus.read(0xab40));
assertEquals(0xff, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0xab41));
assertEquals(0x00, bus.read(0xab41, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x7f, bus.read(0xab42));
assertEquals(0x7f, bus.read(0xab42, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0xfe, bus.read(0xab43));
assertEquals(0xfe, bus.read(0xab43, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
}
@@ -1051,17 +1051,17 @@ public class CpuAbsoluteXModeTest extends TestCase {
0xfe, 0x12, 0xab); // INC $ab12,X
cpu.step();
assertEquals(0x01, bus.read(0xab30));
assertEquals(0x01, bus.read(0xab30, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x80, bus.read(0xab31));
assertEquals(0x80, bus.read(0xab31, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0xab32));
assertEquals(0x00, bus.read(0xab32, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
src/test/java/com/loomcom/symon/CpuAbsoluteYModeTest.java
+3 -3
View File
@@ -411,7 +411,7 @@ public class CpuAbsoluteYModeTest extends TestCase {
cpu.setAccumulator(0x00);
bus.loadProgram(0x99, 0x10, 0xab); // STA $ab10,Y
cpu.step();
assertEquals(0x00, bus.read(0xab40));
assertEquals(0x00, bus.read(0xab40, true));
// STA should have NO effect on flags
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -423,7 +423,7 @@ public class CpuAbsoluteYModeTest extends TestCase {
cpu.setAccumulator(0x0f);
bus.loadProgram(0x99, 0x10, 0xab); // STA $ab10,Y
cpu.step();
assertEquals(0x0f, bus.read(0xab40));
assertEquals(0x0f, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -433,7 +433,7 @@ public class CpuAbsoluteYModeTest extends TestCase {
cpu.setAccumulator(0x80);
bus.loadProgram(0x99, 0x10, 0xab); // STA $ab10,Y
cpu.step();
assertEquals(0x80, bus.read(0xab40));
assertEquals(0x80, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
src/test/java/com/loomcom/symon/CpuImpliedModeTest.java
+6 -6
View File
@@ -101,10 +101,10 @@ public class CpuImpliedModeTest {
cpu.step(); // Triggers the BRK
// Was at PC = 0x204. PC+1 should now be on the stack
assertEquals(0x02, bus.read(0x1ff)); // PC high byte
assertEquals(0x05, bus.read(0x1fe)); // PC low byte
assertEquals(0x02, bus.read(0x1ff, true)); // PC high byte
assertEquals(0x05, bus.read(0x1fe, true)); // PC low byte
assertEquals(0x20 | Cpu.P_CARRY | Cpu.P_OVERFLOW | Cpu.P_BREAK,
bus.read(0x1fd)); // Processor Status, with B set
bus.read(0x1fd, true)); // Processor Status, with B set
// Interrupt vector held 0x1234, so we should be there.
assertEquals(0x1234, cpu.getProgramCounter());
@@ -149,10 +149,10 @@ public class CpuImpliedModeTest {
// Was at PC = 0x204. PC+1 should now be on the stack
assertEquals(0x02, bus.read(0x1ff)); // PC high byte
assertEquals(0x05, bus.read(0x1fe)); // PC low byte
assertEquals(0x02, bus.read(0x1ff, true)); // PC high byte
assertEquals(0x05, bus.read(0x1fe, true)); // PC low byte
assertEquals(0x20 | Cpu.P_CARRY | Cpu.P_OVERFLOW | Cpu.P_BREAK | Cpu.P_IRQ_DISABLE,
bus.read(0x1fd)); // Processor Status, with B set
bus.read(0x1fd, true)); // Processor Status, with B set
// Interrupt vector held 0x1234, so we should be there.
assertEquals(0x1234, cpu.getProgramCounter());
src/test/java/com/loomcom/symon/CpuIndexedIndirectModeTest.java
+2 -2
View File
@@ -87,7 +87,7 @@ public class CpuIndexedIndirectModeTest {
cpu.step(1);
assertEquals(0x35, cpu.getAccumulator());
assertEquals(0x31, bus.read(0xc51f));
assertEquals(0x31, bus.read(0xc51f, true));
}
@Test
@@ -103,6 +103,6 @@ public class CpuIndexedIndirectModeTest {
cpu.step(1);
assertEquals(0x11, cpu.getAccumulator());
assertEquals(0x31, bus.read(0xc51f));
assertEquals(0x31, bus.read(0xc51f, true));
}
}
src/test/java/com/loomcom/symon/CpuIndirectIndexedModeTest.java
+2 -2
View File
@@ -62,7 +62,7 @@ public class CpuIndirectIndexedModeTest {
cpu.step(1);
assertEquals(0xf3, cpu.getAccumulator());
assertEquals(0xe3, bus.read(0xd828));
assertEquals(0xe3, bus.read(0xd828, true));
}
@Test
@@ -78,7 +78,7 @@ public class CpuIndirectIndexedModeTest {
cpu.step(1);
assertEquals(0x22, cpu.getAccumulator());
assertEquals(0xe3, bus.read(0xd828));
assertEquals(0xe3, bus.read(0xd828, true));
}
}
src/test/java/com/loomcom/symon/CpuIndirectXModeTest.java
+3 -3
View File
@@ -411,7 +411,7 @@ public class CpuIndirectXModeTest extends TestCase {
cpu.setAccumulator(0x00);
bus.loadProgram(0x9d, 0x10, 0xab); // STA $ab10,X
cpu.step();
assertEquals(0x00, bus.read(0xab40));
assertEquals(0x00, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -422,7 +422,7 @@ public class CpuIndirectXModeTest extends TestCase {
cpu.setAccumulator(0x0f);
bus.loadProgram(0x9d, 0x10, 0xab); // STA $ab10,X
cpu.step();
assertEquals(0x0f, bus.read(0xab40));
assertEquals(0x0f, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -432,7 +432,7 @@ public class CpuIndirectXModeTest extends TestCase {
cpu.setAccumulator(0x80);
bus.loadProgram(0x9d, 0x10, 0xab); // STA $ab10,X
cpu.step();
assertEquals(0x80, bus.read(0xab40));
assertEquals(0x80, bus.read(0xab40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
src/test/java/com/loomcom/symon/CpuTest.java
+25 -25
View File
@@ -71,61 +71,61 @@ public class CpuTest extends TestCase {
public void testStackPush() throws MemoryAccessException {
assertEquals(0xff, cpu.getStackPointer());
assertEquals(0x00, bus.read(0x1ff));
assertEquals(0x00, bus.read(0x1ff, true));
cpu.stackPush(0x06);
assertEquals(0xfe, cpu.getStackPointer());
assertEquals(0x06, bus.read(0x1ff));
assertEquals(0x06, bus.read(0x1ff, true));
cpu.stackPush(0x05);
assertEquals(0xfd, cpu.getStackPointer());
assertEquals(0x06, bus.read(0x1ff));
assertEquals(0x05, bus.read(0x1fe));
assertEquals(0x06, bus.read(0x1ff, true));
assertEquals(0x05, bus.read(0x1fe, true));
cpu.stackPush(0x04);
assertEquals(0xfc, cpu.getStackPointer());
assertEquals(0x06, bus.read(0x1ff));
assertEquals(0x05, bus.read(0x1fe));
assertEquals(0x04, bus.read(0x1fd));
assertEquals(0x06, bus.read(0x1ff, true));
assertEquals(0x05, bus.read(0x1fe, true));
assertEquals(0x04, bus.read(0x1fd, true));
cpu.stackPush(0x03);
assertEquals(0xfb, cpu.getStackPointer());
assertEquals(0x06, bus.read(0x1ff));
assertEquals(0x05, bus.read(0x1fe));
assertEquals(0x04, bus.read(0x1fd));
assertEquals(0x03, bus.read(0x1fc));
assertEquals(0x06, bus.read(0x1ff, true));
assertEquals(0x05, bus.read(0x1fe, true));
assertEquals(0x04, bus.read(0x1fd, true));
assertEquals(0x03, bus.read(0x1fc, true));
cpu.stackPush(0x02);
assertEquals(0xfa, cpu.getStackPointer());
assertEquals(0x06, bus.read(0x1ff));
assertEquals(0x05, bus.read(0x1fe));
assertEquals(0x04, bus.read(0x1fd));
assertEquals(0x03, bus.read(0x1fc));
assertEquals(0x02, bus.read(0x1fb));
assertEquals(0x06, bus.read(0x1ff, true));
assertEquals(0x05, bus.read(0x1fe, true));
assertEquals(0x04, bus.read(0x1fd, true));
assertEquals(0x03, bus.read(0x1fc, true));
assertEquals(0x02, bus.read(0x1fb, true));
cpu.stackPush(0x01);
assertEquals(0xf9, cpu.getStackPointer());
assertEquals(0x06, bus.read(0x1ff));
assertEquals(0x05, bus.read(0x1fe));
assertEquals(0x04, bus.read(0x1fd));
assertEquals(0x03, bus.read(0x1fc));
assertEquals(0x02, bus.read(0x1fb));
assertEquals(0x01, bus.read(0x1fa));
assertEquals(0x06, bus.read(0x1ff, true));
assertEquals(0x05, bus.read(0x1fe, true));
assertEquals(0x04, bus.read(0x1fd, true));
assertEquals(0x03, bus.read(0x1fc, true));
assertEquals(0x02, bus.read(0x1fb, true));
assertEquals(0x01, bus.read(0x1fa, true));
}
public void testStackPushWrapsAroundToStackTop() throws MemoryAccessException {
cpu.setStackPointer(0x01);
cpu.stackPush(0x01);
assertEquals(0x01, bus.read(0x101));
assertEquals(0x01, bus.read(0x101, true));
assertEquals(0x00, cpu.getStackPointer());
cpu.stackPush(0x02);
assertEquals(0x02, bus.read(0x100));
assertEquals(0x02, bus.read(0x100, true));
assertEquals(0xff, cpu.getStackPointer());
cpu.stackPush(0x03);
assertEquals(0x03, bus.read(0x1ff));
assertEquals(0x03, bus.read(0x1ff, true));
assertEquals(0xfe, cpu.getStackPointer());
}
src/test/java/com/loomcom/symon/CpuZeroPageModeTest.java
+47 -47
View File
@@ -119,31 +119,31 @@ public class CpuZeroPageModeTest extends TestCase {
0x06, 0x04);
cpu.step();
assertEquals(0x00, bus.read(0x0000));
assertEquals(0x00, bus.read(0x0000, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x0001));
assertEquals(0x02, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x0002));
assertEquals(0x04, bus.read(0x0002, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x88, bus.read(0x0003));
assertEquals(0x88, bus.read(0x0003, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x0004));
assertEquals(0x00, bus.read(0x0004, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
@@ -274,61 +274,61 @@ public class CpuZeroPageModeTest extends TestCase {
0x26, 0x01); // ROL $01 (m=%10000001, c=0)
cpu.step();
assertEquals(0x00, bus.read(0x0000));
assertEquals(0x00, bus.read(0x0000, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x0001));
assertEquals(0x02, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step(2);
assertEquals(0x05, bus.read(0x0001));
assertEquals(0x05, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x0a, bus.read(0x0001));
assertEquals(0x0a, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x14, bus.read(0x0001));
assertEquals(0x14, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x28, bus.read(0x0001));
assertEquals(0x28, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x50, bus.read(0x0001));
assertEquals(0x50, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0xa0, bus.read(0x0001));
assertEquals(0xa0, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x0001));
assertEquals(0x40, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x81, bus.read(0x0001));
assertEquals(0x81, bus.read(0x0001, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -387,38 +387,38 @@ public class CpuZeroPageModeTest extends TestCase {
0x46, 0x05); // LSR $05
cpu.step();
assertEquals(0x00, bus.read(0x0000));
assertEquals(0x00, bus.read(0x0000, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x0001));
assertEquals(0x00, bus.read(0x0001, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0x0002));
assertEquals(0x01, bus.read(0x0002, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x22, bus.read(0x0003));
assertEquals(0x22, bus.read(0x0003, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x0004));
assertEquals(0x40, bus.read(0x0004, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
// Setting Carry should not affect the result.
cpu.step(2);
assertEquals(0x01, bus.read(0x0005));
assertEquals(0x01, bus.read(0x0005, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -623,61 +623,61 @@ public class CpuZeroPageModeTest extends TestCase {
0x66, 0x11); // ROR $01 (m=%00010000, c=0)
cpu.step();
assertEquals(0x00, bus.read(0x10));
assertEquals(0x00, bus.read(0x10, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x08, bus.read(0x11));
assertEquals(0x08, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x11));
assertEquals(0x04, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x11));
assertEquals(0x02, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0x11));
assertEquals(0x01, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x11));
assertEquals(0x00, bus.read(0x11, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x80, bus.read(0x11));
assertEquals(0x80, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x11));
assertEquals(0x40, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x20, bus.read(0x11));
assertEquals(0x20, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x10, bus.read(0x11));
assertEquals(0x10, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -689,7 +689,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setYRegister(0x00);
bus.loadProgram(0x84, 0x10);
cpu.step();
assertEquals(0x00, bus.read(0x10));
assertEquals(0x00, bus.read(0x10, true));
// Should have no effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -699,7 +699,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setYRegister(0x0f);
bus.loadProgram(0x84, 0x10);
cpu.step();
assertEquals(0x0f, bus.read(0x10));
assertEquals(0x0f, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -708,7 +708,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setYRegister(0x80);
bus.loadProgram(0x84, 0x10);
cpu.step();
assertEquals(0x80, bus.read(0x10));
assertEquals(0x80, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -719,7 +719,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setAccumulator(0x00);
bus.loadProgram(0x85, 0x10);
cpu.step();
assertEquals(0x00, bus.read(0x10));
assertEquals(0x00, bus.read(0x10, true));
// Should have no effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -729,7 +729,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setAccumulator(0x0f);
bus.loadProgram(0x85, 0x10);
cpu.step();
assertEquals(0x0f, bus.read(0x10));
assertEquals(0x0f, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -738,7 +738,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setAccumulator(0x80);
bus.loadProgram(0x85, 0x10);
cpu.step();
assertEquals(0x80, bus.read(0x10));
assertEquals(0x80, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -749,7 +749,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setXRegister(0x00);
bus.loadProgram(0x86, 0x10);
cpu.step();
assertEquals(0x00, bus.read(0x10));
assertEquals(0x00, bus.read(0x10, true));
// Should have no effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -759,7 +759,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setXRegister(0x0f);
bus.loadProgram(0x86, 0x10);
cpu.step();
assertEquals(0x0f, bus.read(0x10));
assertEquals(0x0f, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -768,7 +768,7 @@ public class CpuZeroPageModeTest extends TestCase {
cpu.setXRegister(0x80);
bus.loadProgram(0x86, 0x10);
cpu.step();
assertEquals(0x80, bus.read(0x10));
assertEquals(0x80, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -926,22 +926,22 @@ public class CpuZeroPageModeTest extends TestCase {
0xc6, 0x13); // DEC $13
cpu.step();
assertEquals(0xff, bus.read(0x10));
assertEquals(0xff, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0x11));
assertEquals(0x00, bus.read(0x11, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x7f, bus.read(0x12));
assertEquals(0x7f, bus.read(0x12, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0xfe, bus.read(0x13));
assertEquals(0xfe, bus.read(0x13, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
}
@@ -1182,17 +1182,17 @@ public class CpuZeroPageModeTest extends TestCase {
0xe6, 0x12); // INC $12
cpu.step();
assertEquals(0x01, bus.read(0x10));
assertEquals(0x01, bus.read(0x10, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x80, bus.read(0x11));
assertEquals(0x80, bus.read(0x11, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0x12));
assertEquals(0x00, bus.read(0x12, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
src/test/java/com/loomcom/symon/CpuZeroPageXModeTest.java
+45 -45
View File
@@ -131,38 +131,38 @@ public class CpuZeroPageXModeTest extends TestCase {
0x16, 0xd2); // ASL $d2,X
cpu.step();
assertEquals(0x00, bus.read(0x30));
assertEquals(0x00, bus.read(0x30, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x31));
assertEquals(0x02, bus.read(0x31, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x32));
assertEquals(0x04, bus.read(0x32, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x88, bus.read(0x33));
assertEquals(0x88, bus.read(0x33, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x34));
assertEquals(0x00, bus.read(0x34, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
// Should wrap around, d2 + 30 = 02
cpu.step();
assertEquals(0x02, bus.read(0x02));
assertEquals(0x02, bus.read(0x02, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -251,61 +251,61 @@ public class CpuZeroPageXModeTest extends TestCase {
0x36, 0x01); // ROL $01,X (m=%10000001, c=0)
cpu.step();
assertEquals(0x00, bus.read(0x70));
assertEquals(0x00, bus.read(0x70, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x71));
assertEquals(0x02, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step(2);
assertEquals(0x05, bus.read(0x71));
assertEquals(0x05, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x0a, bus.read(0x71));
assertEquals(0x0a, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x14, bus.read(0x71));
assertEquals(0x14, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x28, bus.read(0x71));
assertEquals(0x28, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x50, bus.read(0x71));
assertEquals(0x50, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0xa0, bus.read(0x71));
assertEquals(0xa0, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x71));
assertEquals(0x40, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x81, bus.read(0x71));
assertEquals(0x81, bus.read(0x71, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -368,38 +368,38 @@ public class CpuZeroPageXModeTest extends TestCase {
0x56, 0x05); // LSR $05,X
cpu.step();
assertEquals(0x00, bus.read(0x30));
assertEquals(0x00, bus.read(0x30, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x31));
assertEquals(0x00, bus.read(0x31, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0x32));
assertEquals(0x01, bus.read(0x32, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x22, bus.read(0x33));
assertEquals(0x22, bus.read(0x33, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x34));
assertEquals(0x40, bus.read(0x34, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
// Setting Carry should not affect the result.
cpu.step(2);
assertEquals(0x01, bus.read(0x35));
assertEquals(0x01, bus.read(0x35, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -641,61 +641,61 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setXRegister(0x30);
cpu.step();
assertEquals(0x00, bus.read(0x40));
assertEquals(0x00, bus.read(0x40, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x08, bus.read(0x41));
assertEquals(0x08, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x04, bus.read(0x41));
assertEquals(0x04, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x02, bus.read(0x41));
assertEquals(0x02, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x01, bus.read(0x41));
assertEquals(0x01, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x00, bus.read(0x41));
assertEquals(0x00, bus.read(0x41, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertTrue(cpu.getCarryFlag());
cpu.step();
assertEquals(0x80, bus.read(0x41));
assertEquals(0x80, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x40, bus.read(0x41));
assertEquals(0x40, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x20, bus.read(0x41));
assertEquals(0x20, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
cpu.step();
assertEquals(0x10, bus.read(0x41));
assertEquals(0x10, bus.read(0x41, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
assertFalse(cpu.getCarryFlag());
@@ -708,7 +708,7 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setYRegister(0x00);
bus.loadProgram(0x94, 0x10); // STY $10,X
cpu.step();
assertEquals(0x00, bus.read(0x40));
assertEquals(0x00, bus.read(0x40, true));
// Should have no effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -719,7 +719,7 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setYRegister(0x0f);
bus.loadProgram(0x94, 0x10); // STY $10,X
cpu.step();
assertEquals(0x0f, bus.read(0x40));
assertEquals(0x0f, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -729,7 +729,7 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setYRegister(0x80);
bus.loadProgram(0x94, 0x10); // STY $10,X
cpu.step();
assertEquals(0x80, bus.read(0x40));
assertEquals(0x80, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -742,7 +742,7 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setAccumulator(0x00);
bus.loadProgram(0x95, 0x10); // STA $10,X
cpu.step();
assertEquals(0x00, bus.read(0x40));
assertEquals(0x00, bus.read(0x40, true));
// Should have no effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -753,7 +753,7 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setAccumulator(0x0f);
bus.loadProgram(0x95, 0x10); // STA $10,X
cpu.step();
assertEquals(0x0f, bus.read(0x40));
assertEquals(0x0f, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -763,7 +763,7 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setAccumulator(0x80);
bus.loadProgram(0x95, 0x10); // STA $10,X
cpu.step();
assertEquals(0x80, bus.read(0x40));
assertEquals(0x80, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
@@ -873,22 +873,22 @@ public class CpuZeroPageXModeTest extends TestCase {
cpu.setXRegister(0x30);
cpu.step();
assertEquals(0xff, bus.read(0x40));
assertEquals(0xff, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0x41));
assertEquals(0x00, bus.read(0x41, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x7f, bus.read(0x42));
assertEquals(0x7f, bus.read(0x42, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0xfe, bus.read(0x43));
assertEquals(0xfe, bus.read(0x43, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
}
@@ -1116,17 +1116,17 @@ public class CpuZeroPageXModeTest extends TestCase {
0xf6, 0x12); // INC $12,X
cpu.step();
assertEquals(0x01, bus.read(0x30));
assertEquals(0x01, bus.read(0x30, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x80, bus.read(0x31));
assertEquals(0x80, bus.read(0x31, true));
assertFalse(cpu.getZeroFlag());
assertTrue(cpu.getNegativeFlag());
cpu.step();
assertEquals(0x00, bus.read(0x32));
assertEquals(0x00, bus.read(0x32, true));
assertTrue(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
src/test/java/com/loomcom/symon/CpuZeroPageYModeTest.java
+3 -3
View File
@@ -47,7 +47,7 @@ public class CpuZeroPageYModeTest extends TestCase {
cpu.setXRegister(0x00);
bus.loadProgram(0x96, 0x10); // STX $10,Y
cpu.step();
assertEquals(0x00, bus.read(0x40));
assertEquals(0x00, bus.read(0x40, true));
// Should have no effect on flags.
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -57,7 +57,7 @@ public class CpuZeroPageYModeTest extends TestCase {
cpu.setXRegister(0x0f);
bus.loadProgram(0x96, 0x10); // STX $10,Y
cpu.step();
assertEquals(0x0f, bus.read(0x40));
assertEquals(0x0f, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
@@ -66,7 +66,7 @@ public class CpuZeroPageYModeTest extends TestCase {
cpu.setXRegister(0x80);
bus.loadProgram(0x96, 0x10); // STX $10,Y
cpu.step();
assertEquals(0x80, bus.read(0x40));
assertEquals(0x80, bus.read(0x40, true));
assertFalse(cpu.getZeroFlag());
assertFalse(cpu.getNegativeFlag());
}
src/test/java/com/loomcom/symon/CrtcTest.java
+9 -9
View File
@@ -242,19 +242,19 @@ public class CrtcTest {
crtc.write(0, 12); // High byte
crtc.write(1, 0x03);
assertEquals(0, crtc.read(1));
assertEquals(0, crtc.read(1, true));
crtc.write(1, 0x70);
assertEquals(0, crtc.read(1));
assertEquals(0, crtc.read(1, true));
crtc.write(0, 13); // Low byte
crtc.write(1, 0xff);
assertEquals(0, crtc.read(1));
assertEquals(0, crtc.read(1, true));
crtc.write(1, 0x0e);
assertEquals(0, crtc.read(1));
assertEquals(0, crtc.read(1, true));
}
@@ -278,10 +278,10 @@ public class CrtcTest {
crtc.write(0, 14);
crtc.write(1, 0x3f);
assertEquals(0x3f, crtc.read(1));
assertEquals(0x3f, crtc.read(1, true));
crtc.write(1, 0x70);
assertEquals(0x70, crtc.read(1));
assertEquals(0x70, crtc.read(1, true));
}
@Test
@@ -313,13 +313,13 @@ public class CrtcTest {
crtc.write(0, 15);
crtc.write(1, 0x00);
assertEquals(0x00, crtc.read(1));
assertEquals(0x00, crtc.read(1, true));
crtc.write(1, 0x1f);
assertEquals(0x1f, crtc.read(1));
assertEquals(0x1f, crtc.read(1, true));
crtc.write(1, 0xff);
assertEquals(0xff, crtc.read(1));
assertEquals(0xff, crtc.read(1, true));
}