Case study

Toy Story disassembly: rebuilding the Mega Drive ROM from generated source

Toy Story disassembly reconstructs the Mega Drive game's ROM as generated assembly source and compares the rebuilt ROM byte for byte with the user's copy. Its 68000 tracer, ROM maps, RNC decoder, and sprite tools support ongoing recovery of routines, text, and graphics formats. The author reports that the rebuild matches while equivalent named source remains incomplete.

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: 1
Last commit: 2026-10-22
Language: Python
License (GitHub): GPL-3.0

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-provided Toy Story USA ROM, Python 3 with capstone, and AS with asl and p2bin are required.
Limits: The author reports 24.7% equivalent named source for the USA ROM; many routines and fields remain unnamed.
License: GPL-3.0-or-later license.

Cite

BibTeX

@misc{toy-story-mega-drive-disasm-case,
  title = {{Toy Story disassembly: rebuilding the Mega Drive ROM from generated source}},
  howpublished = {\url{https://github.com/consolesplayingconsoles/toy-story-disasm}},
  url = {https://github.com/consolesplayingconsoles/toy-story-disasm},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/toy-story-mega-drive-disasm-case/}}
}

Plain text

Toy Story disassembly: rebuilding the Mega Drive ROM from generated source. https://github.com/consolesplayingconsoles/toy-story-disasm (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/toy-story-mega-drive-disasm-case/

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Primary sources

README.md GitHub · consolesplayingconsoles/toy-story-disasm · Revision e3303d2