mirror of
https://github.com/badvision/lawless-legends.git
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216 lines
7.3 KiB
Java
216 lines
7.3 KiB
Java
/**
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* Copyright 2024 Brendan Robert
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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package jace.hardware.massStorage;
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import static jace.hardware.ProdosDriver.MLI_COMMAND;
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import static jace.hardware.ProdosDriver.MLI_UNITNUMBER;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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import java.util.concurrent.atomic.AtomicReference;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import jace.Emulator;
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import jace.apple2e.MOS65C02;
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import jace.apple2e.SoftSwitches;
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import jace.core.RAM;
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import jace.hardware.ProdosDriver.MLI_COMMAND_TYPE;
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/**
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* Representation of a hard drive or 800k disk image used by CardMassStorage
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* @author Brendan Robert (BLuRry) brendan.robert@gmail.com
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*/
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public class LargeDisk implements IDisk {
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RandomAccessFile diskImage;
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File diskPath;
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// Offset in input file where data can be found
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private int dataOffset = 0;
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private int physicalBlocks = 0;
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// private int logicalBlocks;
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public LargeDisk(File f) {
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try {
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readDiskImage(f);
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} catch (IOException ex) {
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Logger.getLogger(LargeDisk.class.getName()).log(Level.SEVERE, null, ex);
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}
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}
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@Override
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public void mliFormat() throws IOException {
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throw new UnsupportedOperationException("Not supported yet.");
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}
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@Override
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public void mliRead(int block, int bufferAddress) throws IOException {
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AtomicReference<IOException> error = new AtomicReference<>();
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Emulator.withMemory(memory -> {
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try {
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if (block < physicalBlocks) {
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diskImage.seek((block * BLOCK_SIZE) + dataOffset);
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for (int i = 0; i < BLOCK_SIZE; i++) {
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memory.write(bufferAddress + i, diskImage.readByte(), true, false);
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}
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} else {
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for (int i = 0; i < BLOCK_SIZE; i++) {
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memory.write(bufferAddress + i, (byte) 0, true, false);
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}
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}
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} catch (IOException ex) {
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error.set(ex);
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}
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});
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if (error.get() != null) {
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throw error.get();
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}
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}
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@Override
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public void mliWrite(int block, int bufferAddress) throws IOException {
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AtomicReference<IOException> error = new AtomicReference<>();
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Emulator.withMemory(memory -> {
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try {
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if (block < physicalBlocks) {
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diskImage.seek((block * BLOCK_SIZE) + dataOffset);
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byte[] buf = new byte[BLOCK_SIZE];
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for (int i = 0; i < BLOCK_SIZE; i++) {
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buf[i]=memory.readRaw(bufferAddress + i);
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}
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diskImage.write(buf);
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}
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} catch (IOException ex) {
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error.set(ex);
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}
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});
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if (error.get() != null) {
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throw error.get();
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}
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}
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@Override
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public void boot0(int slot) {
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Emulator.withComputer(c->
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c.getCpu().whilePaused(()->{
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try {
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// System.out.println("Loading boot0 to $800");
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mliRead(0, 0x0800);
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} catch (IOException ex) {
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Logger.getLogger(LargeDisk.class.getName()).log(Level.SEVERE, null, ex);
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}
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byte slot16 = (byte) (slot << 4);
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// System.out.println("X = "+Integer.toHexString(slot16));
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((MOS65C02) c.getCpu()).X = slot16;
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RAM memory = c.getMemory();
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SoftSwitches.AUXZP.getSwitch().setState(false);
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SoftSwitches.LCBANK1.getSwitch().setState(false);
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SoftSwitches.LCRAM.getSwitch().setState(false);
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SoftSwitches.LCWRITE.getSwitch().setState(true);
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SoftSwitches.RAMRD.getSwitch().setState(false);
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SoftSwitches.RAMWRT.getSwitch().setState(false);
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SoftSwitches.CXROM.getSwitch().setState(false);
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SoftSwitches.SLOTC3ROM.getSwitch().setState(false);
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SoftSwitches.INTC8ROM.getSwitch().setState(false);
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memory.write(CardMassStorage.SLT16, slot16, false, false);
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memory.write(MLI_COMMAND, (byte) MLI_COMMAND_TYPE.READ.intValue, false, false);
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memory.write(MLI_UNITNUMBER, slot16, false, false);
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// Write location to block read routine to zero page
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memory.writeWord(0x048, 0x0c000 + CardMassStorage.DEVICE_DRIVER_OFFSET + (slot * 0x0100), false, false);
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// System.out.println("JMP $800 issued");
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c.getCpu().setProgramCounter(0x0800);
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})
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);
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}
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public File getPhysicalPath() {
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return diskPath;
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}
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public void setPhysicalPath(File f) throws IOException {
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diskPath = f;
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}
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private boolean read2mg(File f) {
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boolean result = false;
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FileInputStream fis = null;
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try {
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fis = new FileInputStream(getPhysicalPath());
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if (fis.read() == 0x32 && fis.read() == 0x49 && fis.read() == 0x4D && fis.read() == 0x47) {
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System.out.println("Disk is 2MG");
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// todo: read header
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dataOffset = 64;
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physicalBlocks = (int) (f.length() / BLOCK_SIZE);
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// logicalBlocks = physicalBlocks;
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result = true;
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}
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} catch (IOException ex) {
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Logger.getLogger(LargeDisk.class.getName()).log(Level.SEVERE, null, ex);
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} finally {
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try {
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if (fis != null) {
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fis.close();
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}
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} catch (IOException ex) {
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Logger.getLogger(LargeDisk.class.getName()).log(Level.SEVERE, null, ex);
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}
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}
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return result;
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}
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private void readHdv(File f) {
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System.out.println("Disk is HDV");
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dataOffset = 0;
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physicalBlocks = (int) (f.length() / BLOCK_SIZE);
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// logicalBlocks = physicalBlocks;
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}
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private void readDiskImage(File f) throws IOException {
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eject();
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setPhysicalPath(f);
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if (!read2mg(f)) {
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readHdv(f);
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}
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diskImage = new RandomAccessFile(f, "rwd");
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}
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@Override
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public void eject() {
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if (diskImage != null) {
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try {
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diskImage.close();
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diskImage = null;
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setPhysicalPath(null);
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} catch (IOException ex) {
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Logger.getLogger(LargeDisk.class.getName()).log(Level.SEVERE, null, ex);
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}
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}
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}
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@Override
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public boolean isWriteProtected() {
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return diskPath == null || !diskPath.canWrite();
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}
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@Override
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public int getSize() {
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return physicalBlocks;
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}
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}
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