peteward44 / webnes Goto Github PK

NES emulator in Javascript using HTML5 WebGL or canvas. Optimised for Chrome's V8 engine

License: MIT License

JavaScript 79.06% HTML 0.53% CSS 0.02% Assembly 15.76% C++ 1.63% Makefile 0.08% PHP 1.47% Batchfile 0.03% C 0.93% Python 0.01% PowerShell 0.01% NASL 0.46%

webnes's Introduction

WebNES

NES emulator in Javascript using HTML5 canvas. Optimised for Chrome's V8 engine. Due to various performance issues and the lack of real typed arrays in IE, it is entirely not supported.

Just play

A release build can be played here http://peteward44.github.io/WebNES

Screenshots

Super Mario Brothers 3

Mike Tyson's Punchout

RC Pro Am 2

Slalom

Features

Supports all common NES mapper formats, approximately 98% of games should work
Audio support using the HTML5 WebAudio API
WebGL support with canvas fallback on platforms which do not support it
Supports a selection of WebGL shaders used in the higan SNES emulator, such as CRT monitor emulation
Remappable keyboard keys
Save state support through quick save / quick load
Game genie database - If a game is loaded which has known game genie codes, the player can click the star on the toolbar to be able to activate / deactivate GG codes
Screenshots
Game pad support
NTSC / PAL support
Zip file support to load ROMs
Game speed can be slowed down / sped up
Debugging for ROM authors or other emulator authors - Trace logs can be generated for CPU instructions and PPU events

Building

WebNES can run without building, however various optimisations are performed by the closure compiler and the grunt build script. You will need npm and bower installed.

Windows

Run setup.cmd
Run build_release.cmd

Linux

npm install
bower install
grunt

webnes's People

Contributors

Stargazers

Watchers

webnes's Issues

Audio broken on SMB

In Super Mario Bros., the audio is sped up.

Tetris 1

Could you simply add the original Tetris ROM as an option?

Loving this project but I have one issue I need help resolving. Webnes is not recognizing keybindings for controller 2. I've reassigned the map inputs, but controller 2 just ends up controlling player 1.

Task "closureCompiler:nesJs" failed

Running "closureCompiler:nesJs" (closureCompiler) task
Executing: java -server -XX:+TieredCompilation -jar "closureCompiler/build/compiler.jar" --js E:/code/frontend/WebNES/out/js/nes.min.js --js_output_file=E:\code\frontend\WebNES\out\js\tmp.nes.min.js --compilation_level SIMPLE_OPTIMIZATIONS --debug false --externs closureCompiler/externs/dngamepads.js --externs closureCompiler/externs/glmatrix.js --externs closureCompiler/externs/jquery-1.9.js --externs closureCompiler/externs/jquery-ui.js --externs closureCompiler/externs/jszip.js --externs closureCompiler/externs/qtip2.js --externs closureCompiler/externs/window.js --warning_level verbose --jscomp_error checkRegExp --jscomp_error checkDebuggerStatement --jscomp_error checkVars --jscomp_error const --jscomp_error constantProperty --jscomp_error duplicate --jscomp_error suspiciousCode --jscomp_off globalThis --jscomp_off checkTypes --summary_detail_level 3

Error: Command failed: java -server -XX:+TieredCompilation -jar "closureCompiler/build/compiler.jar" --js E:/code/frontend/WebNES/out/js/nes.min.js --js_output_file=E:\code\frontend\WebNES\out\js\tmp.nes.min.js --compilation_level SIMPLE_OPTIMIZATIONS --debug false --externs closureCompiler/externs/dngamepads.js --externs closureCompiler/externs/glmatrix.js --externs closureCompiler/externs/jquery-1.9.js --externs closureCompiler/externs/jquery-ui.js --externs closureCompiler/externs/jszip.js --externs closureCompiler/externs/qtip2.js --externs closureCompiler/externs/window.js --warning_level verbose --jscomp_error checkRegExp --jscomp_error checkDebuggerStatement --jscomp_error checkVars --jscomp_error const --jscomp_error constantProperty --jscomp_error duplicate --jscomp_error suspiciousCode --jscomp_off globalThis --jscomp_off checkTypes --summary_detail_level 3

'java' ��ڲ��ⲿ��Ҳ��ǿ��еĳ��

��ļ��

FAILED to run command for target: nesJs

Warning: Task "closureCompiler:nesJs" failed. Use --force to continue.

I know this emulator is like old, but...

Hiya! i LOVE this emulator! it allows me to play nes games on a chromebook offline! anyway, i have a couple things that should get fixed.

i get an "incorrect nes header" error when using the folder icon to load roms. dragging works, but lags my chromebook. please fix if possible for ease of use.
i get sometimes a "mapper insert number here is not supported." I don't know what it means, but could you please fix it to support mapper insert number here. I would like to not have to find another lost levels rom.

Thanks if you can fix!

P.S. could you make a snes emulator EXACTLY like this nes emulator. (and call it webSNES?)

Sound issues

Hello

I love your emulator (love the post-processing effects ! )

But i keep getting jitters in the sound.
At first i thought it was because i was running a PAL rom, but even with an NTSC rom i get strange jitters.
I tryed with another machine and same issue. Is this due to newer JS engine in Chrome ?

edit:
The only warning i get in the console is :
"The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu" webAudioRenderer.js:70

edit2:
Okay, updated some code to only start webnes after a button press, warning is gone. but the jittered audio remains

edit3:
I notice the FPS indicator sometimes dips a bit sometimes. could be the reason for jittered audio ?

edit4:
I remember a while back, Chrome updating things because of "Spectre" vulnerability, and adding random jitter to callbacks