Sunday afternoon. One hour. Less than 150LOC (< 4kb).

MicroVM is a stack-based micro virtual machine written in Ruby, running its own micro bytecode format called MC.

$ wget https://raw.github.com/txus/microvm/master/microvm
$ chmod +x microvm
$ ./microvm some_file.mc

You can try some example MC files in this very repo.

It's a learning example: it's a really simple implementation of a VM that works, so it's easy to get a general grasp about how things are structured.

• Compact bytecode format (although it could be more compact)
• Method calls
• Types: only String and Fixnum for now.
• Sort of runtime type checking

This was made by Josep M. Bach (Txus) under the MIT license. I'm @txustice on twitter (where you should probably follow me!).