eschaton posted:

if you have a spare x86-64 virtual machine handy, you can boot the new demo of Mezzano that was released a few days ago, and enjoy an operating system built almost entirely in Common Lisp

as far as I know the only part of the OS itself that's not written in either Lisp or a little inline assembly is the tiny first stage boot loader, everything else is Lisp including the TCP stack (including IPv6) and all of the device drivers

unfortunately the user experience of the system isn't anything like a classic Lisp Machine: there's no status/mode line, no dired, no zmacs, just a few basic applications including an emacs-style editor (of course) and a simple Lisp listener atop a rudimentary compositing window system

fortunately it's still pretty straightforward to modify while it's running: for the majority of Mezzano's code, you don't have to batch recompile and restart for your changes to take effect, you can just modify the code and reload, and watch your modifications take effect

someone build awful.lisp now so it can be a poasting station