I swear I remember using this. I even remember the syntax. I was able to compile it and just start writing in it. I have no idea how I know this syntax.

Did early linux have this? Maybe netbsd?

I actually found it. It was on simtel: https://archive.org/details/Simtel20_Sept92

I must have gotten it from there. I would routinely get any thing Walnut Creek would make.

I also realized a couple years ago I could navigate EDLIN without help and knew how to use masm. Somehow I had forgotten what I know but my fingers did not.