rust-chip8-opengl

A CHIP-8 emulator written in rust. Can be used both as a standalone application, running CHIP-8 ROMs in terminal or in a separate window, or as a library to simulate a CHIP-8 processor.

Install

cargo install rust-chip8-opengl --all-features

Or install it with only one interface:

cargo install rust-chip8-opengl --features terminal

cargo install rust-chip8-opengl --features open-gl

Usage

Usage as an emulator

rust-chip8-opengl [OPTIONS]

Available options:

• -f, --file [FILE]: The CHIP-8 file to run, i.e. -f ./my_game.ch8. Can be omitted to run the emulator in an interactive mode where the use enters opcodes manually.
• -m, --mode [MODE]: The mode to run the emulator in, either terminal or open-gl.
• --debug-file [FILE]: The file to log the opcodes to. If omitted, no opcodes are logged.

Key map:

Note that if ran in terminal mode, each keypress will toggle that key being on. So pressing W would toggle the chip's 5 key, and the user would have to press W again to release the key.

Usage as a library

cargo add rust-chip8-opengl

Example code:

extern crate rust_chip8_opengl;

use rust_chip8_opengl::processor::Processor;

fn main() {
  let mut p = Processor::new();

  // Execute individual opcodes
  p.execute(0x60FF);
  p.execute(0x6118);
  assert_eq!(p.get_register_value(0x0), 0xFF);
  assert_eq!(p.get_register_value(0x1), 0x18);

  // Load a program and execute it step by step
  let program = [0x6005, 0x6105, 0x8014];
  // load_program also available for u8
  p.load_program_u16(&program);

  p.step();
  p.step();
  p.step();
  assert_eq!(p.get_register_value(0x0), 0xA);

  println!("Done");
}

See the Processor Docs.rs documentation for more.

Emulator output

cargo run -- -f ./Chip8Picture.ch8 -m terminal

[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
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[][]                  [][][][][][][][]    []            []    []    [][][][][][][][]    [][][][][][][][]                    [][]
[][]                  []                  []            []    []    []            []    []            []                    [][]
[][]                  []                  []            []    []    []            []    []            []                    [][]
[][]                  []                  []            []    []    []            []    []            []                    [][]
[][]                  []                  []            []    []    []            []    []            []                    [][]
[][]                  []                  []            []    []    []            []    []            []                    [][]
[][]                  []                  []            []    []    []            []    []            []                    [][]
[][]                  []                  [][][][][][][][]    []    [][][][][][][][]    [][][][][][][][]                    [][]
[][]                  []                  []            []    []    []                  []            []                    [][]
[][]                  []                  []            []    []    []                  []            []                    [][]
[][]                  []                  []            []    []    []                  []            []                    [][]
[][]                  []                  []            []    []    []                  []            []                    [][]
[][]                  []                  []            []    []    []                  []            []                    [][]
[][]                  []                  []            []    []    []                  []            []                    [][]
[][]                  [][][][][][][][]    []            []    []    []                  [][][][][][][][]                    [][]
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[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]

  PC  |  I   |  V0  |  V1  |  V2  |  V3  |  V4  |  V5  |  V6  |  V7  |  V8  |  V9  |  Va  |  Vb  |  Vc  |  Vd  |  Ve  |  Vf  |
 0x246| 0x294| 0x2C |  0x8 | 0x10 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |  0x0 |
  DT  |  ST  |  I0  |  I1  |  I2  |  I3  |  I4  |  I5  |  I6  |  I7  |  I8  |  I9  |  IA  |  IB  |  IC  |  ID  |  IE  |  IF  
  0x0 |  0x0 |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   |  F   

cargo run -- -f Chip8Picture.ch8 -m open-gl