A chip 9 interpreter written in Rust. Built by referencing Cowgod's great chip-8 reference found here: http://devernay.free.fr/hacks/chip8/C8TECH10.HTM.
This is now mostly complete. There might be some instructions missing - but it runs PONG and BRIX (along with a few others).
Run:
$ cargo run PATH_TO_ROM
Build
$ cargo build
As noted below - running with release is not recommended right now.
This was my first crack at an emulator like program. I went with a rather rudimentary approach where I switched on each opcode and stepped accordingly.
I tried (in most places) to try to have somewhat clean code. I wrote some utility functions for bit manipulation, using Cowgod's convention for referring to bits in the op codes.
The code surrounding sound & key presses leaves a bit to be desired. Particularly trying to determine if something was a complete key press vs. if the key is still held down. My implementation for distinguishing between the two is guess work, but it appears to work.
It would appear that building the interpreter with --release makes it run too quickly. I think I can solve this my emulating cycles or something along those lines.
I would bet there's an op code or two missing. I'll add those later if needed.
Went down an emulator rabbit hole, someone mentioned chip-8 and it seemed like a fun project to learn a bit about emulators, op codes and some computer concepts I wasn't very familiar with.