public synchronized byte[] getExtendedRAM(int size) {
byte[] rv = null;
if (size > 0) {
if (this.ramExtended != null) {
if (size > this.ramExtended.length) {
rv = new byte[size];
Arrays.fill(rv, (byte) 0);
System.arraycopy(this.ramExtended, 0, rv, 0, this.ramExtended.length);
this.ramExtended = rv;
} else {
rv = this.ramExtended;
}
} else {
rv = new byte[size];
Arrays.fill(rv, (byte) 0);
this.ramExtended = rv;
}
}
return rv;
}
public EmuThread(ScreenFrm screenFrm, Properties props) {
super("JKCEMU CPU");
this.screenFrm = screenFrm;
this.z80cpu = new Z80CPU(this, this);
this.monitor = "a monitor object for synchronization";
this.joyFrm = null;
this.joyThreads = new JoystickThread[2];
this.ram = new byte[0x10000];
this.ramExtended = null;
this.ramFloppy1 = new RAMFloppy();
this.ramFloppy2 = new RAMFloppy();
this.printMngr = new PrintMngr();
this.audioIn = null;
this.audioOut = null;
this.loadData = null;
this.resetLevel = ResetLevel.POWER_ON;
this.emuRunning = false;
this.emuSys = null;
Arrays.fill(this.joyThreads, null);
applySettings(props);
}
@Override
public void run() {
this.emuRunning = true;
while (this.emuRunning) {
try {
/*
* Pruefen, ob ein Programm geladen oder der Emulator
* tatsaechlich zurueckgesetzt werden soll
*/
LoadData loadData = null;
synchronized (this.monitor) {
loadData = this.loadData;
if (loadData != null) {
this.loadData = null;
} else {
if (this.resetLevel == ResetLevel.POWER_ON) {
Arrays.fill(this.ram, (byte) 0);
}
}
}
if (loadData != null) {
loadData.loadIntoMemory(this);
this.z80cpu.setRegPC(loadData.getStartAddr());
if (this.emuSys != null) {
int spInitValue = this.emuSys.getAppStartStackInitValue();
if (spInitValue > 0) {
this.z80cpu.setRegSP(spInitValue);
}
}
} else {
if ((this.resetLevel == ResetLevel.COLD_RESET)
|| (this.resetLevel == ResetLevel.POWER_ON)) {
this.z80cpu.resetCPU(true);
} else {
this.z80cpu.resetCPU(false);
}
if (this.emuSys != null) {
this.emuSys.reset(this.resetLevel, Main.getProperties());
this.z80cpu.setRegPC(this.emuSys.getResetStartAddress(this.resetLevel));
}
}
// RAM-Floppies und Druckmanager zuruecksetzen
this.printMngr.reset();
this.ramFloppy1.reset();
this.ramFloppy2.reset();
if ((this.emuSys != null)
&& (this.resetLevel == ResetLevel.POWER_ON)
&& Main.getBooleanProperty("jkcemu.ramfloppy.clear_on_power_on", false)) {
if (this.emuSys.supportsRAMFloppy1() && (this.ramFloppy1.getUsedSize() > 0)) {
this.ramFloppy1.clear();
}
if (this.emuSys.supportsRAMFloppy2() && (this.ramFloppy2.getUsedSize() > 0)) {
this.ramFloppy2.clear();
}
}
// Fenster informieren
final Frame[] frms = Frame.getFrames();
if (frms != null) {
EventQueue.invokeLater(
new Runnable() {
@Override
public void run() {
for (Frame f : frms) {
if (f instanceof BasicFrm) {
((BasicFrm) f).resetFired();
}
}
}
});
}
// in die Z80-Emulation verzweigen
this.resetLevel = ResetLevel.NO_RESET;
this.z80cpu.run();
} catch (Z80ExternalException ex) {
} catch (Exception ex) {
this.emuRunning = false;
EventQueue.invokeLater(new ErrorMsg(this.screenFrm, ex));
}
}
}