
Reading your 'how I got to the point of making this' post was also very interesting!
yep! you can target bare metal armv4t-unknown-eabi and there are some nice community-made abstractions for its MMIO
This struggles to run at 30FPS (out of 60) on my 3.8GHz POWER9 CPU
on your 3.8GHz WHAT CPU!?
(looking at these prices today, and damn the chip shortage / etc. sure have done this product line dirty... total cost for my build was sub-$1k thanks to preordering it in a black friday sale five years ago)