Castlevania: Symphony of the Night: matching decompilation across PlayStation, PSP and Saturn builds

Requirements & limits

• Prerequisites: The repository includes no game assets and none of the assembly needed to compile; README requires a prior copy of the game. The Build wiki asks for an unmodified US PlayStation disc as BIN/CUE, while the pinned Makefile reads both PSP-derived builds from a European Dracula X Chronicles ISO and the Saturn build from a Saturn BIN/CUE, each placed under disks/ with a version-specific name.
• Prerequisites: The Build wiki is tested against Ubuntu 24.04 LTS in CI and also covers Windows through WSL 2 and Arch-based distributions; a Dockerfile provides an Ubuntu Noble environment. Builds need Go, Rust, Python 3.12+, MIPS and SH binutils, a MIPS GCC, ninja and submodule tools such as m2c, maspsx, asm-differ, mipsmatch and decomp-permuter. Project-hosted prebuilt archives, including cc1-psx, mwccpsp, a Cygnus 2.7 toolchain and wibo, are checked against SHA-256 files; the Saturn build also uses dosemu.
• Scope: README describes a work-in-progress matching decompilation of four builds: us (PlayStation SLUS-00067, the reference), hd (an unreleased Japanese PS1 build found in Castlevania: Dracula X Chronicles data), pspeu (the European Dracula X Chronicles release) and saturn (the externally developed Saturn port). The Build wiki notes that some non-matching functions remain behind a NON_MATCHING macro and are not guaranteed to be functionally equivalent. README links mutable progress pages on sotn.xee.dev and decomp.dev.
• Testing evidence: Unless SKIP_CHECK is set, the pinned build code hashes its outputs against config/check.<version>.sha, which lists main.exe, DRA.BIN, RIC.BIN and stage and overlay files for us and shorter lists for hd, pspeu and saturn. The wiki still names a make check step that the pinned Makefile does not define. These checks compare file identity for the supplied version.
• License: The Makefile also accepts a pc version and src/pc holds native-port code, but the PC Port wiki page says no working end-to-end port based on the decompilation exists yet. The repository declares AGPL-3.0, while disc images, extracted assets and assembly, and the downloaded compilers keep separate rights. CONTRIBUTING allows coding-agent assistance only for changes contributors can justify and operate manually and requires commits and pull requests without autonomous tooling.

About this entry

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Primary sources

1. README.md GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
2. Makefile GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
3. LICENSE GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
4. CONTRIBUTING.md GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
5. .gitmodules GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
6. Dockerfile GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
7. disks/README GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
8. tools/requirements-debian.txt GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
9. tools/sotn-assets/build.go GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
10. tools/sotn-assets/check.go GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
11. config/check.us.sha GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
12. config/check.hd.sha GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
13. config/check.pspeu.sha GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
14. config/check.saturn.sha GitHub · Xeeynamo/sotn-decomp · Revision eddaf22
15. https://github.com/Xeeynamo/sotn-decomp/wiki/Build/720bcf3b1212d130b28bb6ccbeda2b887ea96457
16. https://github.com/Xeeynamo/sotn-decomp/wiki/PC-Port/ebe1b37979d1a1966abb68d388b753e4407cfd3c