Case study

Maniac Mansion: a commented C64 engine and loader disassembly

Maniac Mansion's Commodore 64 engine and special disk loaders are documented in a reconstructed, commented disassembly. The material groups more than 500 routines into modules covering rendering, audio, input, resource loading and the script interpreter; the author reports that all code is commented.

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

Stars: 50
Last commit: 2025-12-11
Language: Assembly

GitHub data as of 2026-11-10

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Requirements & limits

Prerequisites: Reading the routines requires familiarity with 6502 assembly; understanding their hardware interactions also benefits from knowledge of C64 chips and interrupts.
Limits: Naming and explanation improvements remain pending.
License: No licence file in the repository.

Cite

BibTeX

@misc{maniac-mansion-c64-explained-case,
  title = {{Maniac Mansion: a commented C64 engine and loader disassembly}},
  howpublished = {\url{https://github.com/pditincho/mm-explained}},
  url = {https://github.com/pditincho/mm-explained},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/maniac-mansion-c64-explained-case/}}
}

Plain text

Maniac Mansion: a commented C64 engine and loader disassembly. https://github.com/pditincho/mm-explained (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/maniac-mansion-c64-explained-case/

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About this entry

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Primary sources

README.md GitHub · pditincho/mm-explained · Revision 152940f