those that ran commodore 64s will remember the same with the 1541 drive units. copy protection involved various methods of introducing errors onto disks. this

those that ran commodore 64s will remember the same with the 1541 drive units. copy protection involved various methods of introducing errors onto disks. this played hell with the drive head alignment and sounded terrible. see: http://c64preservation.com/dp.php?pg=protection http://c64preservation.com/dp.php?pg=protection