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Vhex is a kernel which provide development and retro ingenierie platform for the Casio's OS
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README.md

Vhex Kernel

Vhex is a kernel which provide retro ingenierie environment for the fx9860g. The Casio's OS code is not open-source, but we can read the binary for understand his working. There are in particular the syscalls, OS's functions that can be called as a library by the add-ins, which are a gold mine of clues about the functioning of the material.

features

  • Bootloader
  • Loader ELF
  • Scheduler (not prehemptive yet)
  • Driver (EEPROM (read), screen, keyboard, timers)
  • Syscall
  • Virtual File System
  • File System Ext2 on RAM

Building

Before compiling for the first time, There are few dependencies:

  • A suitable GCC toolchain in the PATH. You can absolutely not build Vhex with your system compiler! sh3eb-elf is strongly advised.
  • g1a wrapper to generate the Casio header.
  • P7 communication utilities.

To compile the project, you just plug the calculator and execute:

% make
% make install