Emulators Written in JavaScript

The title is a tiny bit misleading. Indeed all of those are JavaScript emulators, but not all of them were <i>written</i> in JS. At least one on the list (mupen64plus) is transpiled from C++ using the (amazing) emscripten.

This appears to be ripped from the original list here, which is also more uptodate:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;fcambus&#x2F;jsemu" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;fcambus&#x2F;jsemu</a>

How many of them are proper, accurate emulators though (and not emscriptened ones like mupen64)? Parsing bytes and mapping them to instructions is easy, and I believe that&#x27;s why most of them are for very simple machines. We&#x27;re still very far away from having multiple PS1&#x2F;N64 era that are running at a tolerable framerate.<p>Except 1964js, which works in a way that both amazes me and makes me feel dirty at the same time.

small &amp; easy linux-like in-browser emu: <a href="http:&#x2F;&#x2F;bellard.org" rel="nofollow">http:&#x2F;&#x2F;bellard.org</a><p>fullscreen, &quot;Unix-like virtual shell&quot;, u.a. ssh(!?); ping(ok) &quot;-&quot;: no c&amp;p, <a href="http:&#x2F;&#x2F;cb.vu&#x2F;" rel="nofollow">http:&#x2F;&#x2F;cb.vu&#x2F;</a><p>think, there are some more Linux &amp; unix Emulators in js? would be nice, find some in next comments. :-)

Intresting that SNES is missing from the nintendo list. There&#x27;s a good bit of literature on the underlying implementation for SNES roms: <a href="https:&#x2F;&#x2F;github.com&#x2F;bttf&#x2F;snes_dev" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;bttf&#x2F;snes_dev</a><p>(Full disclosure: I spent a little time accumulating aforementioned literature)

I wrote a Chip-8 emulator (VM?) in C# and then tweaked it so that Bridge.NET could compile it down to JavaScript:<p><a href="https:&#x2F;&#x2F;blog.dantup.com&#x2F;2016&#x2F;06&#x2F;dachip8js-my-csharp-chip8-interpreter-running-in-the-browser&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.dantup.com&#x2F;2016&#x2F;06&#x2F;dachip8js-my-csharp-chip8-in...</a>

Also missing a 6502 emulator I wrote in Go that is transpiled to JavaScript using Gopherjs: <a href="https:&#x2F;&#x2F;play.dodolabs.io&#x2F;?code=89e9a475" rel="nofollow">https:&#x2F;&#x2F;play.dodolabs.io&#x2F;?code=89e9a475</a>

Can&#x27;t wait to see some of these ported to WebAssembly.

I would actually be more interested in the ones that are actively maintained. Many tend to come and go, NESBox being one that comes to mind.

Missing a TI calculator emulator I wrote in C that can be compiled with emscripten and run in the browser (does that count?):<p><a href="https:&#x2F;&#x2F;github.com&#x2F;KnightOS&#x2F;z80e" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;KnightOS&#x2F;z80e</a>

Some of these are not emulators, they are just code translated to Javascript, or e.g. compilers written in Javascript.