uk.co.javagear
Class SN76496

java.lang.Object
  uk.co.javagear.SN76496

public final class SN76496
extends java.lang.Object

Texas SN76496 Emulation.

Version:

18th January 2003

Author:

Copyright (C) 2002-2003 Chris White

See Also:

"JavaGear Final Project Report"

Field Summary

private javax.sound.sampled.AudioFormat	audioFormat Specifies the arrangement of sound data.
private byte[]	buffer Buffer for sound data.
private ToneGenerator	chan0 Tone Generator 1.
private ToneGenerator	chan1 Tone Generator 2.
private ToneGenerator	chan2 Tone Generator 3.
private NoiseGenerator	chan3 Noise Generator.
private double	clockSpeed PSG Clock Speed.
private ToneGenerator	currentGenerator Pointer to current Tone Generator.
private boolean	enabled Sound Enabled.
private java.io.FileWriter	fileWriter For Recording Sound to Disk.
private javax.sound.sampled.SourceDataLine	line The line that transmits audio to speakers.
private boolean	recording Record Sound to Disk.
private int	sampleRate Output Sample Rate.
private int	samplesPerFrame Samples to Generate per video frame.

Constructor Summary

SN76496(double c, int s)
SN76496 Constructor.

Method Summary

private void	convertToWav() Convert RAW output to WAV file.
boolean	isEnabled() Returns true if this instance of SN76496 is enabled and false otherwise.
void	output() Convert PSG settings to Java Sound.
void	reset() Reset SN76496 to Default Values.
void	setChannelEnabled(int channel) Toggle a particular channel On/Off.
void	setEnabled() Toggle SN76496 On/Off.
void	setFPS(int v) Set current FPS Rate.
void	setRecord() Toggle sound recording to WAV file.
private void	startRecording() Start sound recording to WAV file.
void	startSound() Start emulation.
void	stopRecording() Stop sound recording to WAV file.
void	stopSound() Stop emulation.
void	write(int value) Program the PSG.

Methods inherited from class java.lang.Object

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

Field Detail

chan0

private ToneGenerator chan0

Tone Generator 1.

chan1

private ToneGenerator chan1

Tone Generator 2.

chan2

private ToneGenerator chan2

Tone Generator 3.

chan3

private NoiseGenerator chan3

Noise Generator.

currentGenerator

private ToneGenerator currentGenerator

Pointer to current Tone Generator.

buffer

private byte[] buffer

Buffer for sound data.

fileWriter

private java.io.FileWriter fileWriter

For Recording Sound to Disk.

audioFormat

private javax.sound.sampled.AudioFormat audioFormat

Specifies the arrangement of sound data.

line

private javax.sound.sampled.SourceDataLine line

The line that transmits audio to speakers.

clockSpeed

private double clockSpeed

PSG Clock Speed.

sampleRate

private int sampleRate

Output Sample Rate.

samplesPerFrame

private int samplesPerFrame

Samples to Generate per video frame.

enabled

private boolean enabled

Sound Enabled.

recording

private boolean recording

Record Sound to Disk.

Constructor Detail

SN76496

public SN76496(double c,
               int s)

SN76496 Constructor.

Parameters:

c - Clock Speed (Hz)

s - Sample Rate (Hz)

Method Detail

reset

public void reset()

Reset SN76496 to Default Values.

isEnabled

public boolean isEnabled()

Returns true if this instance of SN76496 is enabled and false otherwise.

Returns:

true if enabled.

setEnabled

public void setEnabled()

Toggle SN76496 On/Off.

setChannelEnabled

public void setChannelEnabled(int channel)
                       throws java.lang.IllegalArgumentException

Toggle a particular channel On/Off.

Parameters:

channel - channel to toggle (0-3)

Throws:

java.lang.IllegalArgumentException - if the value of channels is not 1, 2 or 3.

setFPS

public void setFPS(int v)

Set current FPS Rate. Required to generate the correct number of samples per frame.

Parameters:

v - FPS Rate

write

public void write(int value)

Program the PSG. Connected this procedure to a Z80 Port.

Parameters:

value - Value to write (0-0xFF)

startSound

public void startSound()

Start emulation.

stopSound

public void stopSound()

Stop emulation.

output

public void output()

Convert PSG settings to Java Sound.

setRecord

public void setRecord()

Toggle sound recording to WAV file.

startRecording

private void startRecording()

Start sound recording to WAV file.

stopRecording

public void stopRecording()

Stop sound recording to WAV file.

convertToWav

private void convertToWav()

Convert RAW output to WAV file.