'PirateSlayer'
Author:Displacer (registered user: 14 posts )
Date: Tue, Jun 26th, 2012 @ 21:14 ( . )

I've been working on the protection on Demon Stalkers and it fits into the description of PirateSlayer V2 that is described on this site but either there is a mistake there, or this one is slightly different.

What I'm referring to is the byte string the protection check is looking for on T2 S0. It's listed here as "Checks for the pattern $D7 $D7 $EB $CC $AD on track 2" that is correct except for when it gets to the bytes $CC and $AD it is looking for a repeating set of those 2 bytes 512 long. Only after those 512 have been verified is the last set of bytes, $55 $AE $9B $55 $AD $55 $CB $AE $6B $AB $AD $AF checked.

On another note, the drive code is pretty sneaky on how it executes. It actually executes twice in buffer $0300. First time through it only gets a few instructions into the routine when it is interrupted and restarted at the beginning, right in the middle of executing


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Replies:
--* PirateSlayer
6/26/2012 @ 21:20--Pete Rittwage
6/26/2012 @ 21:44----Displacer
6/27/2012 @ 21:18------LordCrass
6/27/2012 @ 21:42--------Displacer
6/27/2012 @ 21:53----------Pete Rittwage
6/27/2012 @ 22:15------------Displacer
6/28/2012 @ 05:32--------------hyper active
6/28/2012 @ 08:31----------------Pete Rittwage
6/28/2012 @ 08:40------------------Displacer
6/28/2012 @ 11:16--------------------Displacer
6/28/2012 @ 15:48----------------------LordCrass
6/28/2012 @ 16:05------------------------Displacer
6/28/2012 @ 20:38--------------------------LordCrass
6/28/2012 @ 21:49----------------------------Displacer
7/01/2012 @ 11:31------------------------------Displacer
7/01/2012 @ 12:51--------------------------------Displacer
8/18/2012 @ 06:59----------------------------------Fungus
------* encryption routines
10/24/2012 @ 19:58------Alex

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