Have a few of them (previous hardware revisions though)... had the intention to write a keyboard firmware in assembly. I wanted to code clean 64bits riscv assem

Have a few of them (previous hardware revisions though)... had the intention to write a keyboard firmware in assembly. I wanted to code clean 64bits riscv assembly instead of 32bits riscv, even if the ISA seems to scale well from 32bits to 64bits. I have not managed to do anything with them, because I am side tracked to code other things, and by the look of it, I don't even know if I will ever use them.