Writing an x86 emulator in JavaScript

mietek 10y ago ↗

Here’s another one:

http://bellard.org/jslinux/

https://github.com/levskaya/jslinux-deobfuscated

jevinskie 10y ago ↗

https://github.com/copy/v86 has a MIT license.

benbristow 10y ago ↗

Writing an x86 emulator to run in javascript on an x86 machine. (although of course this would work on ARM etc. too).

Pretty cool though in all fairness.

aappleby 10y ago ↗

I know you're not too interested in performance here, but replacing DataView with a Uint8Array will probably get you a 10x+ win - DataView is extremely slow and V8 can't optimize calls to Program.getUint8(PC) in the same way that it can optimize Program[PC].

tadeuzagallo 10y ago ↗

Thanks, indeed I didn't make any efforts to make it faster, but this seems fair... I honestly didn't know DataView was that slow, it got fibonacci(40) down to 1m53s. Faster than PERL according to http://fengmk2.com/blog/2011/fibonacci/nodejs-python-php-rub...

Writing an x86 emulator in JavaScript (tadeuzagallo.com)

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