This looks pretty cool. I've always wished for some kind of "2D REPL" experience with assembler, similar to what we can do in Common Lisp. The closest I've gott

This looks pretty cool. I've always wished for some kind of "2D REPL" experience with assembler, similar to what we can do in Common Lisp. The closest I've gotten to this was experimenting with SIMD intrinsics with SB-SIMD (an SBCL contrib library that provides tons of additional SIMD support to the compiler backend). One niche use case I see for this minor mode is possibly learning how to program for microcontrollers with so little RAM that you can probably print each byte on a sheet of paper to debug (i.e. 4KiB of RAM or less)