hades.models.rtlib.memory
Class ROM

java.lang.Object
  hades.simulator.SimObject
      hades.models.rtlib.memory.GenericMemory
          hades.models.rtlib.memory.ROM

All Implemented Interfaces:

java.lang.Cloneable, ContextToolTip, Memory, java.io.Serializable, Simulatable

Direct Known Subclasses:

ROMcs, ROMoe

public class ROM

extends GenericMemory

ROM - a generic ROM with n words by m bits.

This class models a standard LSI ROM without clocking or enable.

See Also:

Serialized Form

Field Summary

protected PortStdLogicVector	port_A
protected PortStdLogicVector	port_D
static double	t_access
static double	t_tristate
static double	t_undefined

Fields inherited from class hades.models.rtlib.memory.GenericMemory

bit_mask, data, enableAnimationFlag, last_read_addr, last_read_data, last_write_addr, last_write_data, MEF, n_bits, n_words, resourcename, TRISTATED, UNDEFINED, vector_000, vector_111, vector_UUU, vector_XXX, vector_ZZZ

Fields inherited from class hades.simulator.SimObject

classloader, console, debug, editor, name, parent, ports, propertySheet, simulator, symbol, versionId, visible

Constructor Summary

ROM()
ROM constructor

Method Summary

boolean	canChangeSize()
protected void	constructPorts()
void	elaborate(java.lang.Object arg) elaborate(): On elaboration, the inputs of the ROM will be undefined.
void	evaluate(java.lang.Object arg) evaluate(): Return the data at address after t_access
boolean	resize(int n_words, int n_bits)
void	setBitsPerWord(int n_bits)
void	setSize(int n_words)

Methods inherited from class hades.models.rtlib.memory.GenericMemory

addMemoryListener, addMemoryListenerOld, checkInvalidateMemory, configure, constructStandardValues, createMemory, dataAtAddressIsUndefined, dbg, getAddressBusWidth, getAddrOffset, getBitsPerWord, getConfigDialog, getDataArray, getDataAt, getEnableAnimationFlag, getExternalResources, getHexDigitsPerWord, getHexString, getInstructionDecoder, getPropertySheet, getResourcename, getSize, getToolTip, initialize, initializeWithDefaultValues, initializeWithRandomValues, initializeWithX, initializeWithZeroes, isConnected, main, merge, needsExternalResources, notifyReadListeners, notifyReadListenersOld, notifyWriteListeners, notifyWriteListenersOld, parse, parseLabelLine, parseRAM, removeMemoryListener, removeMemoryListenerOld, save, setDataArray, setDataAt, setEnableAnimationFlag, setEnableAnimationFlag, setInstructionDecoder, setResourcename, toString, warning, write

Methods inherited from class hades.simulator.SimObject

constructDynamicSymbol, copy, getBindkey, getClassLoader, getDebug, getEditor, getFullName, getName, getParent, getPort, getPorts, getResourceAsStream, getSimulator, getSymbol, getSymbolResourceName, getVersionId, isVisible, keyPressed, message, mousePressed, needsDynamicSymbol, setClassLoader, setConsole, setDebug, setEditor, setName, setParent, setPorts, setSimulator, setSymbol, setVersionId, setVisible, tearDown

Methods inherited from class java.lang.Object

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

Field Detail

port_A

protected PortStdLogicVector port_A

port_D

protected PortStdLogicVector port_D

t_access

public static final double t_access

See Also:

Constant Field Values

t_tristate

public static final double t_tristate

See Also:

Constant Field Values

t_undefined

public static final double t_undefined

See Also:

Constant Field Values

Constructor Detail

ROM

public ROM()

ROM constructor

Method Detail

constructPorts

protected void constructPorts()

Overrides:

constructPorts in class GenericMemory

canChangeSize

public boolean canChangeSize()

Specified by:

canChangeSize in interface Memory

Overrides:

canChangeSize in class GenericMemory

setSize

public void setSize(int n_words)

Specified by:

setSize in interface Memory

Overrides:

setSize in class GenericMemory

setBitsPerWord

public void setBitsPerWord(int n_bits)

Specified by:

setBitsPerWord in interface Memory

Overrides:

setBitsPerWord in class GenericMemory

resize

public boolean resize(int n_words,
                      int n_bits)

Specified by:

resize in interface Memory

Overrides:

resize in class GenericMemory

elaborate

public void elaborate(java.lang.Object arg)

elaborate(): On elaboration, the inputs of the ROM will be undefined. Correspondingly, the outputs are, too.

Specified by:

elaborate in interface Simulatable

Overrides:

elaborate in class GenericMemory

evaluate

public void evaluate(java.lang.Object arg)

evaluate(): Return the data at address after t_access

Specified by:

evaluate in interface Simulatable

Overrides:

evaluate in class GenericMemory