I remember back in the day I used to crack Commodore 64 software, and some of the best protection I remember was when code was written and executed to the RAM i

I remember back in the day I used to crack Commodore 64 software, and some of the best protection I remember was when code was written and executed to the RAM in the disk drive, using the intelligent 1541 drive to verify the original disk was in the drive. It was brilliant, and took me longer than any other program to crack. It required the used of a disk memory disassembler, really obscure stuff. Sierra software used to use multiple encryptions of the original disk-verification code, if I remember correctly. I feel some residual guilt about it now, but I was 14, and honestly, I learned more 6502 assembler cracking code than I ever did writing it. It was like a puzzle. Sorry, Oil's Well developers.