one thing we did on the C64 in this vein (I was a bad kid) was to send opcodes to the CPU on the 1541 floppy drive to send the head to a nonexistent track. Thi

one thing we did on the C64 in this vein (I was a bad kid) was to send opcodes to the CPU on the 1541 floppy drive to send the head to a nonexistent track. This would sometimes jam the head and require physical repair of the drive.