That source code seems very strange. I'm not even sure what language it is.

On one hand, some things feel a high-level as C - such as many of the procs starting with "proc oops". On the other hand, things like "proc netloc" seem to have a chunk of assembly embedded in the middle of it. The use of symbols in the code (e.g., "←", which seems to be the assignment operator) is also interesting.

Even though I don't fully understand it, I find old code like this absolutely fascinating. I also feel the same way about old electronics/electrical manuals.