mirror of
https://github.com/sethm/symon.git
synced 2024-06-07 03:29:28 +00:00
279 lines
6.8 KiB
Java
279 lines
6.8 KiB
Java
package com.loomcom.symon;
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import com.loomcom.symon.devices.Acia;
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import com.loomcom.symon.devices.Acia6551;
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import org.junit.Test;
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import static org.junit.Assert.assertEquals;
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import static org.mockito.Mockito.*;
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public class AciaTest {
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@Test
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public void shouldTriggerInterruptOnRxFullIfRxIrqEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Disable TX IRQ, Enable RX IRQ
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acia.write(2, 0x00);
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acia.rxWrite('a');
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verify(mockBus, atLeastOnce()).assertIrq();
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}
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@Test
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public void shouldNotTriggerInterruptOnRxFullIfRxIrqNotEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Disable TX IRQ, Disable RX IRQ
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acia.write(2, 0x02);
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acia.rxWrite('a');
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verify(mockBus, never()).assertIrq();
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}
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@Test
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public void shouldTriggerInterruptOnTxEmptyIfTxIrqEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Enable TX IRQ, Disable RX IRQ
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acia.write(2, 0x06);
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// Write data
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acia.write(0, 'a');
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verify(mockBus, never()).assertIrq();
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// Transmission should cause IRQ
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acia.txRead(true);
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verify(mockBus, atLeastOnce()).assertIrq();
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}
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@Test
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public void shouldNotTriggerInterruptOnTxEmptyIfTxIrqNotEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Disable TX IRQ, Disable RX IRQ
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acia.write(2, 0x02);
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// Write data
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acia.write(0, 'a');
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// Transmission should not cause IRQ
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acia.txRead(true);
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verify(mockBus, never()).assertIrq();
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}
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@Test
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public void shouldTriggerInterruptFlagOnRxFullIfRxIrqEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Disable TX IRQ, Enable RX IRQ
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acia.write(2, 0x00);
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acia.rxWrite('a');
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// Receive should cause IRQ flag to be set
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assertEquals(0x80, acia.read(0x0001, true) & 0x80);
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}
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@Test
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public void shouldNotTriggerInterruptFlagOnRxFullIfRxIrqNotEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Disable TX IRQ, Disable RX IRQ
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acia.write(2, 0x02);
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acia.rxWrite('a');
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// Receive should not cause IRQ flag to be set
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assertEquals(0x00, acia.read(0x0001, true) & 0x80);
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}
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@Test
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public void shouldTriggerInterruptFlagOnTxEmptyIfTxIrqEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Enable TX IRQ, Disable RX IRQ
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acia.write(2, 0x06);
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// Write data
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acia.write(0, 'a');
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verify(mockBus, never()).assertIrq();
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// Transmission should cause IRQ flag to be set
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acia.txRead(true);
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assertEquals(0x80, acia.read(0x0001, true) & 0x80);
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}
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@Test
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public void shouldNotTriggerInterruptFlagOnTxEmptyIfTxIrqNotEnabled() throws Exception {
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Bus mockBus = mock(Bus.class);
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Acia acia = new Acia6551(0x000);
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acia.setBus(mockBus);
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// Disable TX IRQ, Disable RX IRQ
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acia.write(2, 0x02);
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// Write data
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acia.write(0, 'a');
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// Transmission should not cause IRQ flag to be set
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acia.txRead(true);
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assertEquals(0x00, acia.read(0x0001, true) & 0x80);
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}
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@Test
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public void newAciaShouldHaveTxEmptyStatus() throws Exception {
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Acia acia = new Acia6551(0x000);
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assertEquals(0x10, acia.read(0x0001, true));
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}
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@Test
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public void aciaShouldHaveTxEmptyStatusOffIfTxHasData() throws Exception {
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Acia acia = new Acia6551(0x000);
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acia.txWrite('a');
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assertEquals(0x00, acia.read(0x0001, true));
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}
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@Test
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public void aciaShouldHaveRxFullStatusOffIfRxHasData() throws Exception {
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Acia acia = new Acia6551(0x000);
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acia.rxWrite('a');
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assertEquals(0x18, acia.read(0x0001, true));
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}
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@Test
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public void aciaShouldHaveTxEmptyAndRxFullStatusOffIfRxAndTxHaveData()
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throws Exception {
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Acia acia = new Acia6551(0x000);
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acia.rxWrite('a');
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acia.txWrite('b');
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assertEquals(0x08, acia.read(0x0001, true));
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}
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@Test
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public void aciaShouldOverrunAndReadShouldReset()
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throws Exception {
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Acia acia = new Acia6551(0x0000);
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// overrun ACIA
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acia.rxWrite('a');
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acia.rxWrite('b');
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assertEquals(0x04, acia.read(0x0001, true) & 0x04);
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// read should reset
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acia.rxRead(true);
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assertEquals(0x00, acia.read(0x0001, true) & 0x04);
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}
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@Test
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public void aciaShouldOverrunAndMemoryWindowReadShouldNotReset()
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throws Exception {
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Acia acia = new Acia6551(0x0000);
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// overrun ACIA
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acia.rxWrite('a');
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acia.rxWrite('b');
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assertEquals(0x04, acia.read(0x0001, true) & 0x04);
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// memory window read should not reset
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acia.rxRead(false);
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assertEquals(0x04, acia.read(0x0001, true) & 0x04);
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}
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@Test
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public void readingBuffersShouldResetStatus()
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throws Exception {
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Acia acia = new Acia6551(0x0000);
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acia.rxWrite('a');
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acia.txWrite('b');
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assertEquals(0x08, acia.read(0x0001, true));
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assertEquals('a', acia.rxRead(true));
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assertEquals('b', acia.txRead(true));
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assertEquals(0x10, acia.read(0x0001, true));
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}
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@Test
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public void A()
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throws Exception {
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Acia acia = new Acia6551(0x0000);
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acia.rxWrite('a');
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acia.txWrite('b');
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assertEquals(0x08, acia.read(0x0001, true));
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assertEquals('a', acia.rxRead(false));
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assertEquals('b', acia.txRead(false));
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assertEquals(0x08, acia.read(0x0001, true));
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}
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@Test
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public void statusRegisterInitializedAtHardwareReset() throws Exception {
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Acia6551 acia = new Acia6551(0x0000);
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assertEquals(0x10, acia.read(0x0001, false));
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}
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@Test
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public void commandRegisterInitializedAtHardwareReset() throws Exception {
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Acia6551 acia = new Acia6551(0x0000);
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assertEquals(0x02, acia.read(0x0002, false));
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}
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@Test
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public void controlRegisterInitializedAtHardwareReset() throws Exception {
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Acia6551 acia = new Acia6551(0x0000);
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assertEquals(0x00, acia.read(0x0003, false));
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}
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}
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