Case study

Contra (J) disasm: rebuilding the Japanese NES game

Contra (J) disasm reconstructs the Japanese NES game's program banks in assembly. Its Makefile assembles the ROM and compares its SHA3-256 checksum with the original; users provide the CHR banks from their own ROM.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 5
Last commit: 2022-05-09
Language: Assembly

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: Supply CHR banks extracted from the specified Japanese Contra ROM.
Prerequisites: Building requires asm6, a C compiler and OpenSSL for the checksum.
Limits: The author calls the disassembly a first iteration.
License: No licence file in the repository.

Cite

BibTeX

@misc{contra-j-disasm-case,
  title = {{Contra (J) disasm: rebuilding the Japanese NES game}},
  howpublished = {\url{https://github.com/ZReC/contraj-disasm}},
  url = {https://github.com/ZReC/contraj-disasm},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/contra-j-disasm-case/}}
}

Plain text

Contra (J) disasm: rebuilding the Japanese NES game. https://github.com/ZReC/contraj-disasm (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/contra-j-disasm-case/

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About this entry

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Primary sources

README.md GitHub · ZReC/contraj-disasm · Revision 4ebc4b8
Makefile GitHub · ZReC/contraj-disasm · Revision 4ebc4b8