/*
* Copyright (C) 2012 Brendan Robert (BLuRry) brendan.robert@gmail.com.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
package jace.hardware;
import jace.EmulatorUILogic;
import jace.config.ConfigurableField;
import jace.config.Name;
import jace.config.Reconfigurable;
import jace.core.Card;
import jace.core.Computer;
import jace.core.RAMEvent;
import jace.core.RAMEvent.TYPE;
import jace.core.Utility;
import jace.library.MediaConsumer;
import jace.library.MediaConsumerParent;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Apple Disk ][ interface implementation. This card represents the interface
* side of the Disk ][ controller interface as well as the on-board "boot0" ROM.
* The behavior of the actual drive stepping, reading disk images, and so on is
* performed by DiskIIDrive and FloppyDisk, respectively. This class only serves
* as the I/O interface portion. Created on April 21, 2007
*
* @author Brendan Robert (BLuRry) brendan.robert@gmail.com
*/
@Name("Disk ][ Controller")
public class CardDiskII extends Card implements Reconfigurable, MediaConsumerParent {
DiskIIDrive currentDrive;
DiskIIDrive drive1 = new DiskIIDrive(computer);
DiskIIDrive drive2 = new DiskIIDrive(computer);
@ConfigurableField(category = "Disk", defaultValue = "254", name = "Default volume", description = "Value to use for disk volume number")
static public int DEFAULT_VOLUME_NUMBER = 0x0FE;
@ConfigurableField(category = "Disk", defaultValue = "true", name = "Speed boost", description = "If enabled, emulator will run at max speed during disk access")
static public boolean USE_MAX_SPEED = true;
@ConfigurableField(category = "Disk", defaultValue = "", shortName = "d1", name = "Drive 1 disk image", description = "Path of disk 1")
public String disk1;
@ConfigurableField(category = "Disk", defaultValue = "", shortName = "d2", name = "Drive 2 disk image", description = "Path of disk 2")
public String disk2;
public CardDiskII(Computer computer) {
super(computer);
try {
loadRom("jace/data/DiskII.rom");
} catch (IOException ex) {
Logger.getLogger(CardDiskII.class.getName()).log(Level.SEVERE, null, ex);
}
drive1.setIcon(Utility.loadIconLabel("disk_ii.png"));
drive2.setIcon(Utility.loadIconLabel("disk_ii.png"));
reset();
}
@Override
public String getDeviceName() {
return "Disk ][ Controller";
}
@Override
public void reset() {
currentDrive = drive1;
drive1.reset();
drive2.reset();
EmulatorUILogic.removeIndicators(drive1);
EmulatorUILogic.removeIndicators(drive2);
// Motherboard.cancelSpeedRequest(this);
}
@SuppressWarnings("fallthrough")
@Override
protected void handleIOAccess(int register, RAMEvent.TYPE type, int value, RAMEvent e) {
// handle Disk ][ registers
switch (register) {
case 0x0:
case 0x1:
case 0x2:
case 0x3:
case 0x4:
case 0x5:
case 0x6:
case 0x7:
currentDrive.step(register);
break;
case 0x8:
// drive off
currentDrive.setOn(false);
currentDrive.removeIndicator();
break;
case 0x9:
// drive on
currentDrive.setOn(true);
currentDrive.addIndicator();
break;
case 0xA:
// drive 1
currentDrive = drive1;
break;
case 0xB:
// drive 2
currentDrive = drive2;
break;
case 0xC:
// read/write latch
currentDrive.write();
e.setNewValue(currentDrive.readLatch());
break;
case 0xF:
// write mode
currentDrive.setWriteMode();
case 0xD:
// set latch
if (e.getType() == RAMEvent.TYPE.WRITE) {
currentDrive.setLatchValue((byte) e.getNewValue());
}
e.setNewValue(currentDrive.readLatch());
break;
case 0xE:
// read mode
currentDrive.setReadMode();
if (currentDrive.disk != null && currentDrive.disk.writeProtected) {
e.setNewValue(0x080);
} else {
// e.setNewValue((byte) (Math.random() * 256.0));
e.setNewValue(0);
}
break;
}
// even addresses return the latch value
// if (e.getType() == RAMEvent.TYPE.READ) {
// if ((register & 0x1) == 0) {
// e.setNewValue(currentDrive.latch);
// } else {
// // return floating bus value (IIRC)
// }
// }
tweakTiming();
}
@Override
protected void handleFirmwareAccess(int register, TYPE type, int value, RAMEvent e) {
// Do nothing: The ROM does everything
}
public void loadRom(String path) throws IOException {
InputStream romFile = CardDiskII.class.getClassLoader().getResourceAsStream(path);
final int cxRomLength = 0x100;
byte[] romData = new byte[cxRomLength];
try {
if (romFile.read(romData) != cxRomLength) {
throw new IOException("Bad Disk ][ ROM size");
}
getCxRom().loadData(romData);
} catch (IOException ex) {
throw ex;
}
}
@Override
public void tick() {
// Do nothing (if you want 1mhz timing control, you can do that here...)
// drive1.tick();
// drive2.tick();
}
@Override
public void reconfigure() {
super.reconfigure();
try {
if (disk1 != null && !disk1.isEmpty()) {
drive1.insertDisk(new File(disk1));
disk1 = null;
}
if (disk2 != null && !disk2.isEmpty()) {
drive2.insertDisk(new File(disk2));
disk2 = null;
}
} catch (IOException ex) {
Logger.getLogger(CardDiskII.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void tweakTiming() {
if ((drive1.isOn() && drive1.disk != null) || (drive2.isOn() && drive2.disk != null)) {
if (USE_MAX_SPEED) {
computer.getMotherboard().requestSpeed(this);
}
} else {
computer.getMotherboard().cancelSpeedRequest(this);
}
}
@Override
protected void handleC8FirmwareAccess(int register, TYPE type, int value, RAMEvent e) {
// There is no special c8 rom for this card
}
@Override
public void setSlot(int slot) {
super.setSlot(slot);
drive1.getIcon().ifPresent(icon->icon.setText("S" + slot + "D1"));
drive2.getIcon().ifPresent(icon->icon.setText("S" + slot + "D2"));
}
@Override
public MediaConsumer[] getConsumers() {
return new MediaConsumer[]{drive1, drive2};
}
}