CasioEmuX-win

This repo contains a modified version of the Casio emulator developed by qiufuyu and two nX/U8 disassemblers written in lua and written in cpp respectively (their output formats are different).

Files are modified so that they can work on windows.

Note that ROMs are not included in the models folder (for copyright reasons), you have to obtain one from somewhere else or dump it from a real calculator or emulator. (note that models labeled with _emu are for ROMs dumped from official emulators)

Disassembler (lua)

Each argument should have one of these two formats:

• key=value.

• path: equivalent to input=path.

For the supported values of key: see args_assoc in disas.lua file.

Disassembler (cpp)

Build

Open msys2 mingw64 environment.

Run pacman -S mingw-w64-x86_64-gcc to install gcc.

Run pacman -S mingw-w64-x86_64-make to install mingw32-make.

Run mingw32-make in the disas-cpp directory.

If something goes wrong, run mingw32-make clean to clean up and start again.

Usage

• main is for generating disassemblers, run it without arguments to show the help message.

• u8-disas is the nX/u8 disassembler, run it without arguments to show the help message.

• u8-disas-split splits 4-byte command into 2 2-byte commands, run it without arguments to show the help message

Emulator

An emulator and disassembler for the CASIO calculator series using the nX-U8/100 core ported to windows. With debuggers.

Build

Open msys2 mingw64 environment.

Run pacman -S mingw-w64-x86_64-gcc to install gcc.

Run pacman -S mingw-w64-x86_64-make to install mingw32-make.

Run mingw32-make in the emulator directory.

If something goes wrong, run mingw32-make clean to clean up and start again.

Command-line arguments

Each argument should have the format:

• key=value where key does not contain any equal signs.

Supported values of key are: (if value is not mentioned then it does not matter)

• paused: Pause the emulator on start.
• model: Specify the path to model folder. Example value: models/fx570esplus.
• ram: Load RAM dump from the path specified in value.
• clean_ram: If ram is specified, this prevents the calculator from loading the file, instead starting from a clean RAM state.
• preserve_ram: Specify that the RAM should not be dumped (to the value associated with the ram key) on program exit, in other words, preserve the existing RAM dump in the file.
• strict_memory: Print an error message if the program attempt to write to unwritable memory regions corresponding to ROM. (writing to unmapped memory regions always print an error message)
• pause_on_mem_error: Pause the emulator when a memory error message is printed.
• history: Path to a file to load/save command history.
• script: Specify a path to Lua file to be executed on program startup (using value parameter).
• width, height: Initial calculator window width/height on program start. The values can be in hexadecimal (prefix 0x), octal (prefix 0) or decimal. The debugger window is hardcoded as 900x600.
• exit_on_console_shutdown: Exit the emulator when the console thread is shut down.

Available Lua functions

Those Lua functions and variables can be used at the Lua prompt of the emulator.

• emu:set_paused(-): Set emulator state. Called with a boolean value.

• emu:tick(): Execute one command.

• emu:shutdown(): Shutdown the emulator.

• cpu.xxx: Get register value. xxx should be one of

  • r0 to r15
  • One of the register names. See register_record_sources array in emulator\src\Chipset\CPU.cpp.
  • erN, xrN, qrN are not supported.

• cpu.bt: A string containing the current stack trace.

• code[address]: Access code. (By words, only use even address, otherwise program will panic)

• data[address]: Access data. (By bytes)

• data:watch(offset, fn): Set watchpoint at address offset - fn is called whenever data is written to. If fn is nil, clear the watchpoint.

• data:rwatch(offset, fn): Set watchpoint at address offset - fn is called whenever data is read from as data. If fn is nil, clear the watchpoint.

Some additional functions are available in lua-common.lua file. To use those, it's necessary to pass the flag script=emulator/lua-common.lua.