Case study

TH05: reconstructing Touhou 5's PC-98 programs

TH05 reconstructs source for the Japanese PC-98 Touhou 5: Mystic Square programs MAIN.EXE, OP.EXE, MAINE.EXE and ZUN.COM. Maintained C/C++ and reviewed assembly are compared against bounded original code and data extents, including raw bytes and relocation order. The project reports accepted units separately from its still unmeasured overall authored-byte goal.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 0
Last commit: 2026-11-08
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: A user-owned Japanese game image is required; game executables and assets are not included.
Prerequisites: The documented workflow uses pinned ReC98, Borland/Wine and Ghidra analysis tooling.
Limits: The overall authored-byte percentage remains unmeasured, and complete packed-file equality is a separate claim.
License: MIT licence for repository-authored code and documentation.

Cite

BibTeX

@misc{th05-reconstruction-case,
  title = {{TH05: reconstructing Touhou 5's PC-98 programs}},
  howpublished = {\url{https://github.com/N0zoM1z0/th05}},
  url = {https://github.com/N0zoM1z0/th05},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/th05-reconstruction-case/}}
}

Plain text

TH05: reconstructing Touhou 5's PC-98 programs. https://github.com/N0zoM1z0/th05 (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/th05-reconstruction-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

README.md GitHub · N0zoM1z0/th05 · Revision 9df0ac2
docs/PROGRESS.md GitHub · N0zoM1z0/th05 · Revision 9df0ac2
docs/ARCHITECTURE.md GitHub · N0zoM1z0/th05 · Revision 9df0ac2