Vhex disassembler

Vhex is a GUI, Vim based, disassembler for 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

• All SH3 and SH4 instructions traduced "on-the-fly".
• Can handle 3 modes for movements.
• Can handle commands.
• Commands history.
• Compatible with SH3 and SH4 architecture.

List of currently supported commands:

• systab jump into the Casio "syscall handler".
• vbrjmp <zone> jump into the Casio interrupt, exception or tlb miss handlers.
• syscall <id> jump into the syscall function.
• ram <zone> jump into the RAM mapped at different parts of the Virtual Memory.
• jmp <address> jump where you want.
• rom <zone> jump into the ROM mapped at different parts of the Virtual Memory.
• help <cmd> display command's help.

List of currently supported modes:

• UNUSED The session is unused.
• NORMAL User can move freely where it wants.
• COMMAND User can type some commands.

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