SubX now supports basic file operation syscalls: https://github.com/akkartik/mu/blob/7328af20a/subx/ex8.subx

I've also made labels a little safer, so you can't call to inside a function, or jump to within a different function: https://github.com/akkartik/mu/blob/7328af20a/subx/037label_types.cc

Next stop: socket syscalls!

https://github.com/akkartik/mu/blob/7328af20a/subx/Readme.md

This post is part of my Freewheeling Apps Devlog.

Comments gratefully appreciated. Please send them to me by any method of your choice and I'll include them here.