This is supposed to emulate a 32-bit MIPS I chip. I currently have a good bit of the main instruction set and basic syscalls implemented. It has a basic assembler, and I'm working on adding exceptions and the floating-point coprocessor.
It's built in Rust! With eframe! Here's a few screenshots, varying in recency:
I'm able to upload the WASM version every so often, but in the future I'd still like to figure out some possible "Continuous Deployment" way of updating it.
- Step through code, or run at an interval
- Memory and Register monitors
- Configurable Virtual Display
If you don't have a program already at the ready, you'll need MARS and Java (to run MARS).
- clone the repository
- modify
program/build.shto point to the right paths - assemble a MIPS program with
( cd program; ./build.sh [program] )out.data.binandout.text.binshould appear inprogram/.
cargo run --releasein the repository's root to run it
Pretty dang soon I'm going to add the ability to build and assemble programs in the emulator itself, so this is by no means a huge dependency.
No command line arguments for now.
I'm vaguely targeting the PlayStation 1's CPU, but I take my own artistic license when I think it'd be cool to do [OTHER THING]. The PDFs linked in that Copetti article are very helpful.
Well, I'm using MARS as my assembler right now.
I've been using MARS' behavior as a reference, but I've been checking out a few books about MIPS I to continue developing this. I'll probably use MARS' PseudoOps.txt too.