org.zmpp.vm
Class InstructionDecoder

java.lang.Object
  org.zmpp.vm.InstructionDecoder

public class InstructionDecoder
extends Object

The instruction decoder decodes an instruction at a specified address.

Version:

1.0

Author:

Wei-ju Wu

Constructor Summary

InstructionDecoder(Machine machineState, MemoryReadAccess memaccess)
Constructor.

Method Summary

AbstractInstruction

decodeInstruction(int instructionAddress) Decode the instruction at the specified address.

Methods inherited from class java.lang.Object

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

Constructor Detail

InstructionDecoder

public InstructionDecoder(Machine machineState,
                          MemoryReadAccess memaccess)

Constructor.

Parameters:

memaccess - the memory access object

Method Detail

decodeInstruction

public AbstractInstruction decodeInstruction(int instructionAddress)

Decode the instruction at the specified address.

Parameters:

instructionAddress - the current instruction's address

Returns:

the instruction at the specified address