| Author: | Lord Crass (guest: search) |
|---|---|---|
| Date: | Sun, Mar 04th, 2012 @ 03:33 ( . ) |
This one checks protection on every level 10 and up. It moves the head back to track 1, then moves 2 half-tracks back into the drive stop. After this, it uses standard job queue to read in sector 18. The first 2 bytes are transferred to the c64 and used as a memory address for a table. Instead of getting the $39 $00 bytes it needs, it gets $01 $07, which is a valid t/s link in the sector which is part of the file "G4". It's easily cracked, but I'm not entirely sure how this protection is supposed to work. Should there be a second sector 18 on that track that only gets read after the head bump, therefore getting different data? Nibtools should be able to handle a duplicate sector on a track, shouldn't it? |
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