'Mini-Office II and Yogi's G.E.'
Author:Lord Crass (guest: search)
Date: Mon, Feb 20th, 2012 @ 01:00 ( . )

Yogi's Great Escape (PAL) doesn't seem to be protected at all. It's that CIA6526A issue. Change Vice to emulate a C64C PAL and it will load. The loader seems a bit flakey though on the g64 and re-reads files a few times before succeeding. Convert to a d64 instead and it seems more stable.

Mini-Office II has a signature protection on track 37 (it's an all-sync track except for the 5 GCR bytes of "/MINI*" that it looks for) which is properly represented in the image, but the first thing it checks for is that the disk is write protected. Write protect the disk and the protection passes in Vice. There's also a suspicious looking track 38 which contains a lot of sync, bad GCR, and some valid looking data, but I wasn't able to do anything that triggered access to this, so it might be a decoy or just junk.


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