Discussion topics

In this section, we will explore topics regarding the project’s environment, i.e. the protocols and formats implemented or to be implemented, rationales behind those, and some of Cahute’s external-facing logics.

• Number formats
  • CASIOLINK-style BCD
  • fx-9860G-style BCD
  • fx-9860G-style fraction
• Picture formats
  • 1bpp monochrome picture format
  • 1bpp monochrome picture format with CAS50 order
  • Dual 1bpp gray picture format
  • Multiple 1bpp picture format with CAS50 order and palette prefix
  • 4bpp packed RGB picture format
  • R5G6B5 picture format
  • 32bpp ARGB picture format using host endianness
• Text encodings
  • Variable width encoding
  • Fixed-width encoding
  • CAT data encoding
  • CTF data encoding
  • UTF-32 encoding
  • UTF-8 encoding
• File formats
  • CASIOLINK file formats
  • casrc configuration file
  • CASIO Container Format
  • Calculator Text Format (CTF)
  • Catalog files (CAT)
  • FX Program (FXP)
  • GraphCard file format
• Communication protocols
  • Rationales behind the communication protocols
  • CASIOLINK protocol – Serial protocols used by pre fx-9860G calculators
  • Protocol 7.00 – Serial and USB protocol used by post fx-9860G calculators
  • Protocol 7.00 Screenstreaming – fx-9860G and fx-CG screenstreaming
  • USB Mass Storage (UMS) and proprietary extensions for fx-CG calculators
• Main memory data
  • Programs
• USB detection for CASIO calculators
  • Driver detection on Microsoft Windows
• Logging facilities with Cahute