I started programming in GW-BASIC on an IBM PC clone running MS-DOS. Back then, many so-called home and business computers came bundled with a BASIC interpreter, mostly made by or licensed from Microsoft. They all looked similar. You were greeted by a screen with a READY or OK prompt and a blinking cursor waiting for your input. The “screen editor” and interpreter were all in one in the true sense of the word – they weren’t bolted together like the separate text editors and interpreters/compilers we use these days…
Searching for “MOVfuscator” results in this: https://github.com/Battelle/movfuscator
D’oh! Good find, I had it wrong.