tyfkda / nesemu

NES Emulator written in TypeScript

NES Emulator

NES emulator written in TypeScript.

Features

• Run on a browser
• Gamepad support
• Fullscreen
• Multi-window
• Famicom Disk System
• Family BASIC

How to play

• Go to https://tyfkda.github.io/nesemu/
• Drag and drop a rom file (.nes or .zip) onto the page, the game will be started.

Control

NES	Keyboard(1P)	(2P)
Pad	Arrow key	I,J,K,L key
A button	X key	W key
B button	Z key	Q key
Start	Enter	O key
Select	Space	P key

• You can also use a gamepad

Shortcut key:

Key	Action
F1	Save state
F3	Load state

Development

Requirement

• node.js
• npm

Set up

$ npm install

Build (automatically)

$ npm start

• You can see the page in http://localhost:3000/
• Files are generated in public

Release

$ npm run release

• Files are generated in release

Reference

• Nesdev wiki

nesemu's Issues

Support Dropbox, Google Drive

Show error message for unsupported mapper

Save/load status

Implement Disk System

• Fix read error
• Audio
• Eject
• Auto load
• Write back disk image
• Support DMC

Enable fullscreen

Reduce garbage collection

• Detect memory allocation code

Auto Upload Rom

Is it Any possible to load rom automatically

how to implement mapper033

I have try implement mapper033 follow https://www.nesdev.org/wiki/INES_Mapper_033, PrgBank looke like has no problem, but CHRbank fail because photo is break, does someone can to help me how to write chrbank problem

Show FPS

about mapper065 irq

I want to implement mapper65,
follow as link to implement it, found some game can't run, some game break photo,
I think the problem is related to the interrupter,
I have no idea how to implement function "ProcessCpuClock",
do you have any idea??
https://github.com/SourMesen/Mesen/blob/master/Core/IremH3001.h

Support DMC

Implement VRC6 audio

VRC6 audio - Nesdev wiki

Handle joypad

Run cheat code

• Read/write memory
• Input gamepad
• Read screen image

Global palette color config

VRC6 Audio

https://wiki.nesdev.com/w/index.php/VRC6_audio

• More duty ratio on pulse channel
• Reset every 6 clocks on sawtooth channel

Investigate nametable mirroring for iNES mapper 4

Nametable mirroring is not set correctly for iNES mapper 4 (MMC3?).

There is a port to set nametable mirroring ($A000), but some games don't access the port.

Game	iNES mirror mode	Actual
Babel no tou	Horizontal	Vertical
Family tennis	Horizontal	Horizontal

Handle duty cycle for square channel

Run DMC on AudioWorklet

Stop audio when the page is out of focus

Virtual pad for touch devices

Play noise sound

Play sound with given period