Yesterday I acquired a CBM 8050 dual disk drive unit and a piece of software ("Valmisbetoni", a Finnish program for optimizing concrete mixtures) that should be transferred to a PET emulator (i.e. VICE). Good news: the IEEE-488 interface of my PET works. Now I only have to transfer the stuff over, probably using prlink. The dongle protection seems quite simple. It appears that the software is written in BASIC and then compiled. The dongle plugs to the cassette port (either of them), and the program checks for the dongle right in the beginning. If it doesn't find the dongle, it'll jump to the reset routine. I think that it should be easy to remove this protection using the machine language monitor of VICE. This brings a question to my mind. What kinds of copy protection were used on the PET? Were ROM chips and cassette port dongles the only ways, or were disk errors used as well? Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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