Case study

TH08: exact-source reconstruction and separately tested ports

Reconstructs the original Japanese Touhou 8 version 1.00d against its binary and original compiler, then adapts the recovered code for other platforms. Source presence, strict function matching, whole-executable identity and playable-port checks are recorded as different milestones.

Requirements and limitations

Exact checks require the user’s original Japanese TH08 1.00d executable and Visual C++ .NET 2002 toolchain. Ledgers and analysis helpers need Python 3.11+; Linux/macOS toolchain setup also needs Wine and msiextract. Playable products still need original game data.
The pinned main README reports source for 1,107 authored functions and strict acceptance of 1,106, with whole-executable identity still in progress. Linux/web playability and the separate portable-64bit branch do not imply complete binary identity.
The VC7 i386 runtime checkpoint is distinct from a redistributable modern Windows release; macOS remains in progress. Exact normal-build checks and bugfix playtests have different purposes.
A historical oracle accepted instruction bytes while missing wrong floating-literal data. The linked issue/PR records later data-reference checks; matching results support only the properties actually checked.
MIT covers repository code/docs, not the original game. Historical source lineage and agent contributions retain their attribution. No compiler, original game, replay or port was independently run for this catalog.

About this entry

Type: Case study
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Targets: Game

Sources reviewed 2026-10-17

The description was reviewed against primary sources. This does not establish runtime testing, security auditing or verified compatibility.

Requirements and limitations

About this entry

Primary sources