Thank you for the inspiration, I now have a practical-impractical assembly project for my TI TMS99105A homebrew! The 64k barrier is a real pain.

I also have a working design for a small Transformer on the original Game Boy. It has around 4000 parameters fitting in the 8 KB cartridge SRAM, where the "saved game" is the trained model. A TI-82 with its 32 KB of RAM would be even more comfortable.