Machine
Class AbstractCPU

java.lang.Object
  java.util.Observable
      Machine.AbstractCPU

Direct Known Subclasses:

AbstractSM213CPU

public abstract class AbstractCPU
extends java.util.Observable

Nested Class Summary

static class	AbstractCPU.InvalidInstructionException Exception indicating than an invalid instruction was just detected by the CPU.
static class	AbstractCPU.MachineHaltException Exception indicating that the CPU just retired a halt instruction.

Field Summary

static java.lang.String	CURRENT_INSTRUCTION_ADDRESS
protected boolean	isInterrupt Interrupt flag
protected AbstractMainMemory	mem
static java.lang.String	PC
protected java.util.Vector<RegisterSet>	processorState Processor state registers.
protected RegisterSet	reg General purpose register file.

Constructor Summary

AbstractCPU(AbstractMainMemory aMem)

AbstractCPU(java.lang.String aName, AbstractMainMemory aMem)

Method Summary

protected abstract void	cycle() Abstract class that implements cpu control logic.
AbstractMainMemory	getMainMemory()
java.lang.String	getName() Name of this ISA implementation (optional).
DataModel	getPC() Export the PC register.
java.util.Vector<RegisterSet>	getProcessorState()
RegisterSet	getRegisterFile()
void	setPC(int aPC) Set PC to value
boolean	start() Start processor execution.
void	triggerInterrupt()

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

reg

protected RegisterSet reg

General purpose register file.

processorState

protected java.util.Vector<RegisterSet> processorState

Processor state registers.

PC

public static final java.lang.String PC

See Also:

Constant Field Values

CURRENT_INSTRUCTION_ADDRESS

public static final java.lang.String CURRENT_INSTRUCTION_ADDRESS

See Also:

Constant Field Values

isInterrupt

protected boolean isInterrupt

Interrupt flag

mem

protected AbstractMainMemory mem

Constructor Detail

AbstractCPU

public AbstractCPU(java.lang.String aName,
                   AbstractMainMemory aMem)

AbstractCPU

public AbstractCPU(AbstractMainMemory aMem)

Method Detail

getMainMemory

public AbstractMainMemory getMainMemory()

getRegisterFile

public RegisterSet getRegisterFile()

getProcessorState

public java.util.Vector<RegisterSet> getProcessorState()

getName

public java.lang.String getName()

Name of this ISA implementation (optional).

getPC

public DataModel getPC()

Export the PC register.

setPC

public void setPC(int aPC)

Set PC to value

cycle

protected abstract void cycle()
                       throws AbstractCPU.InvalidInstructionException,
                              AbstractCPU.MachineHaltException,
                              AbstractMainMemory.InvalidAddressException

Abstract class that implements cpu control logic.

Throws:

AbstractCPU.InvalidInstructionException

AbstractCPU.MachineHaltException

AbstractMainMemory.InvalidAddressException

triggerInterrupt

public void triggerInterrupt()

start

public boolean start()
              throws AbstractCPU.InvalidInstructionException,
                     AbstractMainMemory.InvalidAddressException

Start processor execution.

Throws:

AbstractCPU.InvalidInstructionException

AbstractMainMemory.InvalidAddressException