Commodore 64 (C64) Preservation ProjectCommodore 64 (C64) Preservation Project
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This project is all done in my spare time, if you like it, please consider donating any small amount you see fit using the link below.
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Vorpal - Early
Contributed by Dr. Markus Brenner

This protection is seen on many high-profile releases by Epyx from 1985-1987. Summer Games II, Winter Games, World Games, Rescue on Fractalus, Barbie, G.I. Joe, Hot Wheels, etc.
The protection was written by Scott Nelson.

The copy protection is checked on track 20. Starting from sector 1, the number of bytes between Syncs are counted for the next 17 blocks. Also, the first byte triggering the sync is read (in other terms, the last byte until the sync signal is registered). If any of these values don't match the expected values, the copy protection failed.

lengthlast byte b4 sync
Header sector 1$11$af
Data sector 1:$4d$ff
Header sector 2:$11$af
Data sector 2:$4d$ff
etc...

News / Blog
General Project News
Posted By Pete Rittwage (on 06/17/2008 @ 18:39)
Subject: test
test
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Posted By Pete Rittwage (on 05/25/2008 @ 16:01)
Subject: New build, including zip support
I uploaded a newer build of NIBTOOLS for testing. It includes adjustments and bugfixes from the last several months. Also notable is the addition of ZIP support for image reading. This currently requires that 'unzip' be in your command line path to function.
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Posted By Pete Rittwage (on 05/05/2008 @ 11:17)
Subject: More Donations
Thanks to Matt Larsen for sending in a box of disks, some of which aren't even in Gamebase yet! :) Also, Thanks Christian Lott and Tom Bies for sending in your collections for imaging.
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Posted By Pete Rittwage (on 04/15/2008 @ 22:10)
Subject: Donations
Thanks very much to Gabriel Borchsenius and Joe Ricci, who recently sent in their disk collections for archiving. Thanks guys! Also thanks to Kenneth Kill Jr. for sending a monetary donation for site upkeep and good will. Thanks Ken!
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Posted By Pete Rittwage (on 03/16/2008 @ 15:17)
Subject: test
This is a test message.
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Posted By Pete Rittwage (on 02/10/2008 @ 21:11)
Subject: Thanks!
Just sending out thanks to Dave M. who loaned me his disk collection for imaging. Dave had a couple hundred disks at least, which took me a couple months to get all the way through. Now they just need cataloged and compared. :) Thanks again. - Pete Rittwage C64 Preservation Project [link]
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Posted By Pete Rittwage (on 01/02/2008 @ 23:32)
Subject: Site updates
I did some big site updates that include a rolling up of many changes from Chris to the CMS and BBS. Also, I created a new DB stat panel and a new database query system.
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Posted By Pete Rittwage (on 12/29/2007 @ 09:47)
Subject: Thanks
Thanks very much to Banguibob, Visualmess, and Daryl K for manually patching up some of the Rapidlok images based on Banguibob's RL guide. We have a few running that wouldn't before with the old Maverick/UU patches.
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Posted By Pete Rittwage (on 12/26/2007 @ 21:30)
Subject: Database Updates
The default behavior of the database page to show the whole database was getting out of hand, so now database page has been updated and searchable.
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Posted By Pete Rittwage (on 12/09/2007 @ 17:23)
Subject: New NIBTOOLS build
I put the latest development snapshot of NIBTOOLS in the files area. [link]
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Posted By Pete Rittwage (on 12/09/2007 @ 14:12)
Subject: Rapidlok Hacking
Banguibob has a nice new page about the RAPIDLOK protection with regard to Pirates! [link]
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Posted By Pete Rittwage (on 11/24/2007 @ 10:44)
Subject: Started to get through some more images
Thanks to all who have been sending in disks and images over the last months. I will try to get through them all by the end of the year. :)
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Posted By Pete Rittwage (on 08/29/2007 @ 17:06)
Subject: Gamebase 64 V5
Gamebase64 V5 is now officially released!
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Posted By Pete Rittwage (on 06/24/2007 @ 15:15)
Subject: Defender of the Crown
Daryl sent me in a fully patched image of Defender of the Crown that appears to work 100%. Thanks very much for fixing this long-standing title, Daryl. The patch fixes the initial loader and the protection check on the second side.
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Posted By Pete Rittwage (on 05/22/2007 @ 21:57)
Subject: Thanks!
Just sending out a big thanks to Jerry and DC for sending me tons of new images in the last month or so. I have many weeks worth of work to get through them all! Don't stop sending them because I'm backed up, though.
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Disk Database Statistics
Titles archived: 2363
Titles verified: 382
Titles added or verified in last year: 732

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Recent Forum Posts
General Project News
Posted By Pete Rittwage (on 06/17/2008 @ 18:39)
Subject: test
test...
Discuss this entry
Posted By Pete Rittwage (on 05/25/2008 @ 16:01)
Subject: New build, including zip support
I uploaded a newer build of NIBTOOLS for testing. It includes adjustments and bugfixes from the last several months. Also notable is the addition of ZIP sup...
Discuss this entry
Posted By Pete Rittwage (on 05/05/2008 @ 11:17)
Subject: More Donations
Thanks to Matt Larsen for sending in a box of disks, some of which aren't even in Gamebase yet! :) Also, Thanks Christian Lott and Tom Bies for sending in y...
Discuss this entry
Posted By Pete Rittwage (on 04/15/2008 @ 22:10)
Subject: Donations
Thanks very much to Gabriel Borchsenius and Joe Ricci, who recently sent in their disk collections for archiving. Thanks guys! Also thanks to Kenneth Kill J...
Discuss this entry
Posted By Pete Rittwage (on 03/16/2008 @ 15:17)
Subject: test
This is a test message....
Discuss this entry
All content copyright (c) 1971-2061 by Peter Rittwage. All programs mentioned are copyrighted by their respective owners.