Remember the 8-bit 6502 chip, built into machines such as the Commodore C64? Remember learning its assembly language? Would you like to? Here's a chance to try it out!
(I didn't learn 6502 assembly language, as it happens, because I didn't come into computing through the C64-Amiga route, the way a fair number of people in my vocational school class did, but rather through Z80 machines such as the Schneider/Amstrad CPC464 and Joyce, so I learned Z80 assembler instead. And, later, x86 assembler.)