Commodore 64 floppy drive has the power to be a computer — bulky 1982 Commodore 1541 5.25 inch drive packs a 1 MHz MOS 6502 CPU

https://www.tomshardware.com/pc-components/cpus/commodore-64-floppy-drive-has-the-power-to-be-a-computer-bulky-1982-commodore-1541-5-25-inch-drive-packs-a-1-mhz-mos-6502-cpu