The Vesta Virtual Machine (vesta) is a virtual CPU emulating the Janus (CISC) instruction set.
Currently, it can execute programs assembled with the Janus Assembler;
however, we are hoping to eventually write a more complex toolchain including a small C-like language and a linker.
If you want to check out vesta for yourself, first you will need a recent version of Rust and its package builder cargo.
Then you can clone the repo with:
git clone https://github.com/janus-cpu/janus-vesta
and compile the executable with cargo build --release. The executable will be in target/release/vesta. Have fun!
Check out vesta --help for more information on how to run things with the emulator. If you want to be able to run any meaningful test programs, make sure to grab jas as well, unless you really like assembling files by hand.
Right now we have implemented:
- Decoding CPU instructions from memory
- (almost) All of the long (32-bit) instructions
- Very verbose debug output
And hopefully in the near future we will also have:
- Fault handing
- Interrupts
- CPU timer
- Memory paging scheme
- 2 CPU modes: Privileged/Kernel and Userland
- A real "terminal" with a VGA-like buffer.
Thanks to my friend Chris for writing jas and working continually on this project with me. Knowing that someone else is interested in this project is almost completely the reason why I haven't quit this yet.