# Infernal Runner JS: reconstructing the CPC game's bytecode engine

> Infernal Runner JS ports the Amstrad CPC game Infernal Runner to JavaScript from analysis of its disk image and Z80 code. It reimplements a cooperative-threaded interpreter for the game's 28 bytecode opcodes, loads the original disk image for graphics and scripts, and includes a bytecode disassembler and Z80 disassembly.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/cyxx/infernal_js>
- Primary source: <https://github.com/cyxx/infernal_js/blob/d1c9a9839d672fbf8c2ed6585ba9af5869da11b1/README.md>
- Catalog page: <https://awesomerea.org/resources/infernal-runner-js-case/>
- Record JSON: <https://awesomerea.org/resources/infernal-runner-js-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/infernal-runner-js-case/index.md)

## Requirements & limits

- **Prerequisites:** Provide the original .dsk image for its bytecode and graphics.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/cyxx/infernal_js/blob/d1c9a9839d672fbf8c2ed6585ba9af5869da11b1/README.md>

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## 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.