# Final Fantasy IX: matching US PlayStation decompilation

> ff9-decomp reconstructs the US PlayStation Final Fantasy IX boot executable and code overlays as C that the author reports compiles to byte-identical binaries. The workflow extracts data from four user-owned discs, while PsyQ SDK code stays in assembly and separate equivalent C supports port work.

- 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/maurizi/ff9-decomp>
- Primary source: <https://github.com/maurizi/ff9-decomp/blob/8091d4d0da5272d8d4a60b00f1cf0dbf296f83a4/README.md>
- Catalog page: <https://awesomerea.org/resources/ff9-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/ff9-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/ff9-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Raw 2352-byte images of all four US game discs.
- **Prerequisites:** Docker and Python 3 for the documented build.
- **Limits:** PsyQ SDK library code remains assembly.
- **License:** Project-authored tools scripts are CC0; submodules retain their own licences.

## Primary sources

1. <https://github.com/maurizi/ff9-decomp/blob/8091d4d0da5272d8d4a60b00f1cf0dbf296f83a4/README.md>
2. <https://github.com/maurizi/ff9-decomp/blob/8091d4d0da5272d8d4a60b00f1cf0dbf296f83a4/src_equiv/README.md>

## More in Games

- [Final Fantasy Tactics Advance: matching decompilation and battle AI analysis](https://awesomerea.org/resources/ffta-battle-ai-decomp-case/index.md) · Case study
- [Final Fantasy Tactics: a matching PlayStation decompilation](https://awesomerea.org/resources/final-fantasy-tactics-decomp-case/index.md) · Case study
- [Final Fantasy Tactics: byte-exact PlayStation decompilation](https://awesomerea.org/resources/fft-decomp/index.md) · Case study
- [Final Fantasy V: a matching SNES disassembly for two ROM versions](https://awesomerea.org/resources/final-fantasy-v-disassembly-case/index.md) · Case study
- [Final Fantasy VII: a matching PlayStation decompilation](https://awesomerea.org/resources/ff7-ps1-matching-decomp-case/index.md) · Case study
- [FINAL FANTASY XIV 1.23b: an experimental matching client decompilation](https://awesomerea.org/resources/ffxiv-123b-matching-decomp-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.