[erik_seaberg]

I’m under the impression that the speed and memory of their PDP-11 were barely enough to run their C compiler, considering that Emacs was considered a heavyweight app and S-Algol had to target a virtual machine instead of native code.

[jjtheblunt]

virtual machines are native code. if you google pdp-11 C you'll get all sorts of interesting articles from 40ish years ago.