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chip8-emu

About

Implementation of a CHIP-8 virtual machine written in C.

GUI is handled with the SDL2 library.

Screenshot

Features an output of the previous, current and future opcode instructions, relevant registers and a render of the contents of the I address register (used for holding sprite data).

Also features a Debug Mode activated with space bar that enables the user to step through instructions one-by-one with the down key.

Debug Mode overlays a grid with framebuffer positions which may come handy for ROM development and bugfixing.

Unit-tests are provided for its basic functionality and each implemented opcode.

Missing features:

  • Stack implementation
  • 60Hz clock (currently runs unhindered at CPU in a while-loop, which may be delayed by SDL calls)
  • Some opcode implementations (0NNN, 00E0, 00EE, 2NNN, EX9E, EXA1 and most FXNN opcodes)
  • Sound (beeping)

Author

Patryk Szczypień - patryk.szczypien@gmail.com

License

This project uses the MIT License with exception to external libraries which have they own licenses:

  • SDL2
  • Unity (unit testing library)
  • PCG basic (PCG Random Number Generation for C.)