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cippotto

Chip-8 interpreter with real-time debugging and register editing capabilities.

Cippotto GUI

Usage

  1. Run the cippotto executable: this will open up the main GUI.
  2. In the Rom panel, select the rom path and change the load address (if needed). Then press the load button.
  3. In the Flow control panel press the play button to start program execution. The program can also be paused, run instruction per instruction, or reset.
  4. In the Registers panel, all general purpose registers, timer registers, and special registers are updated in real-time when the program is running and can be edited when the program is paused.
  5. In the Assembly panel, the decoded instructions from the rom can be inspected. The instruction highlighted at the bottom is the next to be executed by the interpreter.

Command line options

Usage: ./cippotto [options]
Options:
    -h, --help         Print this message and exit.
    -r, --rom <file>   Specify Chip-8 ROM file path.
    -a, --addr <NNN>   Specify 12-bit ROM loading address.
                       If both -r and -a are specified the ROM is pre-loaded.
    -s, --start        Start game automatically upon loading.

Disclamer: ROMs are not provided with this repo, but can be easily downloaded here.

Build using make

Cippotto is written in the C language and uses raylib for creating the GUI. You can follow the installation steps of raylib for your operating system at the following GitHub repository. After making raylib available at system level, you can just run make to build the application:

make all

The built executable can then be found in the bin/ folder:

./bin/cippotto

Disclamer: Cippotto has been built and tested successfully on Windows (MinGW) and GNU/Linux.

Screenshots

Pong Maze
Tetris Blitz

Known limitations

  • Quirks: Only the following pure Chip-8 quirks are supported:

    Cippotto GUI *Test roms can be found at the following GitHub repository.

  • Display wait: Sprites are drawn on the screen without waiting for the vertical blank interrupt.

  • Sound: There is no sound support at the moment.

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Chip-8 interpreter with real-time debugging and register editing capabilities.

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