Case study

casio_fx: documenting Casio calculator serial transfers

casio_fx implements Linux serial transfers for Casio calculators and documents their section-based message exchange and CAS file structure. Its send and receive utilities handle program data for fx-7700GB and fx-7700GE; a converter turns supported monochrome CAS screen dumps into PBM images.

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: 1
Last commit: 2026-11-09
Language: C
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

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Evidence

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

How evidence classes are assigned

Requirements & limits

Prerequisites: Linux and a suitable serial connection with compatible voltage levels are required.
Scope: Program transfer is documented for fx-7700GB and fx-7700GE; monochrome screenshots were tested with CFX-9850G.
Limits: Other data communication functions are not implemented.
License: GPL-3.0 license.

Cite

BibTeX

@misc{casio-fx-case,
  title = {{casio\_fx: documenting Casio calculator serial transfers}},
  howpublished = {\url{https://github.com/tarapitha/casio_fx}},
  url = {https://github.com/tarapitha/casio_fx},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/casio-fx-case/}}
}

Plain text

casio_fx: documenting Casio calculator serial transfers. https://github.com/tarapitha/casio_fx (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/casio-fx-case/

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Primary sources

README.md GitHub · tarapitha/casio_fx · Revision 4f89424
PROTOCOL.md GitHub · tarapitha/casio_fx · Revision 4f89424
CAS_FILE.md GitHub · tarapitha/casio_fx · Revision 4f89424