Case study

Kosmos CP1: reconstructing the CP2 cassette format

The Kosmos CP1 toolchain reconstructs the CP2 cassette interface from a digitized real save and implements Python WAV encoding and decoding. Its documentation specifies FSK carriers, bit timing, byte order and the 256-cell memory image. An assembler and emulator support writing and tracing CP1 programs; the author reports a byte-exact encoding round trip.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 0
Last commit: 2026-10-17
Language: Python
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Observed: Code, documentation and a download method observed; no demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: Python 3 is required; the audio tools also require numpy.
Prerequisites: Loading a generated WAV into hardware requires a Kosmos CP1 and CP2 cassette module.
Testing evidence: The author reports a byte-exact round trip and decoding of a genuine CP2 recording.
License: MIT license.

Cite

BibTeX

@misc{kosmos-cp1-cassette-case,
  title = {{Kosmos CP1: reconstructing the CP2 cassette format}},
  howpublished = {\url{https://github.com/lambdamikel/kosmos-cp1-devel-toolchain}},
  url = {https://github.com/lambdamikel/kosmos-cp1-devel-toolchain},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/kosmos-cp1-cassette-case/}}
}

Plain text

Kosmos CP1: reconstructing the CP2 cassette format. https://github.com/lambdamikel/kosmos-cp1-devel-toolchain (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/kosmos-cp1-cassette-case/

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Primary sources

README.md GitHub · lambdamikel/kosmos-cp1-devel-toolchain · Revision 7d8287f