PSeudo JS

On the record

BIOS sourcing

The maker says they will not provide information on where to find a BIOS file.github.com · read 9 Oct 2026

Browser technologies

The project repository tags it with WebAudio and WebGL.github.com · read 4 Oct 2026

Build requirement

Building PSeudo JS uses the Clang compiler and the project’s build command in a terminal.github.com · read 9 Oct 2026

Codebase

It uses .h headers alongside .js files, inlines modular code for optimization before runtime, and is compatible with ES5 JavaScript onwards.github.com · read 4 Oct 2026

Code structure

The project uses .h headers alongside .js files, inlining modular code for optimization before runtime on the VM.github.com · read 9 Oct 2026

CPU implementation

The project uses a slow CPU interpreter, with an attempt to speed it up using a JavaScript tracer planned later.github.com · read 4 Oct 2026

Game support

The emulator can load some commercial games.github.com · read 9 Oct 2026

JavaScript compatibility

The codebase is compatible with ES5 JavaScript and later.github.com · read 9 Oct 2026

License

PSeudo JS is open source under the Apache 2.0 license.github.com · read 9 Oct 2026

Live build

The maker’s site links to a live build at https://naden.co/pseudo.github.com · read 9 Oct 2026

Maker

The maker’s site identifies the company as Nadenco Smpc and gives Athens, Greece as its location.naden.co · read 9 Oct 2026

Performance limit

The maker describes the speed and overall experience as mediocre at best and says the emulator is quite inaccurate on timing.github.com · read 9 Oct 2026

Performance limitation

The maker describes speed and overall experience as mediocre at best and timing as quite inaccurate.github.com · read 4 Oct 2026

Progress

The repository lists CPU Mips R3000A at 95%, DMA at 90%, CD Decoder at 75%, Audio at 60%, and XA Audio at 10%.github.com · read 4 Oct 2026

Purpose

PSeudo JS is a PlayStation (PSX) emulator written in JavaScript.github.com · read 9 Oct 2026

Run requirement

The project must run from a localhost server such as Apache, and testing requires a valid BIOS file in the bios folder.github.com · read 9 Oct 2026

What it does

PSeudo JS is a PlayStation (PSX) emulator based on JavaScript.github.com · read 4 Oct 2026

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