# jsSMS: Master System and Game Gear emulator

> jsSMS is a JavaScript emulator for Sega Master System and Game Gear ROMs, written to run quickly in mobile browsers. The README says it began as a port of JavaGear and later replaced the interpreter with a dynamic recompiler in src/compiler.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-07
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/gmarty/jsSMS>
- Primary source: <https://github.com/gmarty/jsSMS/blob/5a85c08296ae404ef472158d43a5be5a421b95c0/README.md>
- Catalog page: <https://awesomerea.org/resources/jssms-case/>
- Record JSON: <https://awesomerea.org/resources/jssms-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/jssms-case/index.md)

## Requirements & limits

- It runs Master System and Game Gear ROMs in JavaScript.
- The README credits the original JavaGear copyright to Chris White, 2002-2008.
- License: GPL-3.0.

## Primary sources

1. <https://github.com/gmarty/jsSMS/blob/5a85c08296ae404ef472158d43a5be5a421b95c0/README.md>

## More in Games

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- [Kirby's Adventure: an in-progress NES disassembly](https://awesomerea.org/resources/kirbys-adventure-nes-case/index.md) · Case study
- [Kirby's Dream Land: a Game Boy disassembly with ROM comparison](https://awesomerea.org/resources/kdreamlanddis-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.