I remember a classmate at school messing about with poke on an apple ii.
It ended up with smoke coming out the floppy drive.
POKE put raw data into raw RAM addesses.
Most of the Commodore hardware chips were directly controlled by RAM addresses. No OS preventing you from doing anything.
On early PETs you could actually blow up the screen by setting some kind of refresh rate to the wrong speed or voltage.
Doesn't surprise me you could do the same to a disk drive.
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