/*
* Copyright (c) 2014 Seth J. Morabito <web@loomcom.com>
* Maik Merten <maikmerten@googlemail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package com.loomcom.symon.machines;
import com.loomcom.symon.Bus;
import com.loomcom.symon.Cpu;
import com.loomcom.symon.devices.Acia;
import com.loomcom.symon.devices.Crtc;
import com.loomcom.symon.devices.Memory;
import com.loomcom.symon.devices.Pia;
import com.loomcom.symon.exceptions.MemoryRangeException;
/**
* A SimpleMachine is the simplest 6502 implementation possible - it
* consists solely of RAM and a CPU. This machine is primarily useful
* for running 6502 functional tests or debugging by hand.
*/
public class SimpleMachine implements Machine {
private static final int BUS_BOTTOM = 0x0000;
private static final int BUS_TOP = 0xffff;
private final Bus bus;
private final Memory ram;
private final Cpu cpu;
public SimpleMachine() throws MemoryRangeException {
this.bus = new Bus(BUS_BOTTOM, BUS_TOP);
this.ram = new Memory(BUS_BOTTOM, BUS_TOP, false);
this.cpu = new Cpu();
bus.addCpu(cpu);
bus.addDevice(ram);
}
@Override
public Bus getBus() {
return bus;
}
@Override
public Cpu getCpu() {
return cpu;
}
@Override
public Memory getRam() {
return ram;
}
@Override
public Acia getAcia() {
return null;
}
@Override
public Pia getPia() {
return null;
}
@Override
public Crtc getCrtc() {
return null;
}
@Override
public Memory getRom() {
return null;
}
@Override
public void setRom(Memory rom) throws MemoryRangeException {
// No-op
}
@Override
public int getRomBase() {
return 0;
}
@Override
public int getRomSize() {
return 0;
}
@Override
public int getMemorySize() {
return BUS_TOP + 1;
}
@Override
public String getName() {
return "Simple";
}
}