From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2006-08-27 16:42:49
On Sun, Aug 27, 2006 at 03:43:30AM +0000, William Levak wrote: > Dongles have a capacitor and transistor across several of the lines, so > that a signal output on one line that will appear a short tome later > (determined by the capacitor) on a different line (determined by the > transistor). The actual lines are different for each dongle. The dongle for the Leaderboard golf game really only consists of a card edge connector and a resistor connected across two lines. I'd assume that the lines are SENSE and GND, but it was 20 years ago. I have one dongle, used by a compiled BASIC program on the PET. I removed the protection with the help of VICE. It wasn't trivial, because the compiled BASIC code was a mess. Also, the program computed a checksum over itself. Anyway, I succeeded, and I got the PET, printer and disk drive for my effort. The company now uses the program on a PC running VICE. Marko Message was sent through the cbm-hackers mailing list
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