I don't know enough math to comment on the vanity keygen's cryptography and RNG stuff. If the hardware makes it near impossible to generate enough randomness, that can be skipped 🤙

Some basic level of UTF-8 support is very important. It might be challenging on a Sega Genesis, but should still be possible for some subset of characters, if not the specified ascii+braille subset. I think pixelated bitmap fonts can be used to make things a bit easier.

On the other hand, the originally chosen N64 is a modern day desktop computer with supposedly 4MB of unified memory, and the PS1 someone else brought up apparently has 1MB of video memory.

- Response to @techmet on bounties.monero.social (I can't log back in to comment there anymore, will need someone to relay the message)