The official REA Touhou 4 showcase studies an aimed bullet-ring angle helper in a PC-98 DOS game. It is a focused example of combining assembly inspection with behavior reconstruction and compiler-oriented checks. Read the original case for the specific function and validation boundary; a successful reconstruction of this helper does not imply that the entire game has been recovered.
What to examine
Map the helper's inputs and arithmetic before assigning names to game concepts. Check the reconstructed calculation against the original evidence and the exact historical build assumptions described by the project.
Evidence boundary
The official showcase and linked reconstruction are primary sources for the reported result. AI Craft Pad provides an independent summary, not a rerun of the PC-98 target or compiler checks.
Requirements & evidence
- Resource type
- Case
- Category
- Unknown
- Host platforms
- Unknown
- Targets
- Unknown
- Level
- Unknown
- Original author
- REA project
- Target
- Touhou 4 aimed bullet ring
- Target platform
- PC-98 DOS game
- Goal
- Recover angle helper behavior
- Tools
- REA, native analyzer
- REA used
- Yes
- Source-reported outcome
- Official case reconstructs the angle calculation
- Evidence level
- Official case narrative, not independently reproduced
- Source checked
- 2026-11-03T10:48:35.747273+00:00
Official case narrative, not independently reproduced
Primary sources
Source descriptions establish documented scope. They do not establish that every workflow has been reproduced by AI Craft Pad.