'Bounty Bob'
Author:Lord Crass (guest: search)
Date: Sat, Mar 03rd, 2012 @ 18:03 ( . )

I took a look at a g64 of Bounty Bob today, but can't get it to read track 1.5 in Vice. It's looking for 5x$77 GCR bytes after a sync mark as the start of sector, but it never finds them, even though they show up in the image file. It keeps finding $52 or $75 after the sync mark, even if I remove those from track with a hex editor.

Does anyone know if Vice handles half-tracks properly? It loads further in HOXS, up to 3 blocks remaining, then dies with a checksum error.

They really pulled out all the stops for this protection:

If the disk isn't write protected, or you have a second drive attached, you'll get a checksum error right away. The sectors are non-standard GCR, extra long, and without standard header. GCR decoding is done on the c64 instead of in the drive. Density is non-standard, and changes when you move to the half-track.

I wonder if it was the game's author, Bill Hogue, who wrote this protection?


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Replies:
--* Bounty Bob
3/03/2012 @ 23:35--hyper active
3/04/2012 @ 11:07----Pete Rittwage
3/04/2012 @ 21:55------Lord Crass
3/04/2012 @ 23:55--------Pete Rittwage
3/05/2012 @ 10:49----------Lord Crass
3/09/2012 @ 21:28------------Pete Rittwage
3/22/2012 @ 14:56--------------jerrykurtz
4/09/2012 @ 20:38----------------Pete Rittwage
4/10/2012 @ 20:54------------------hyper active
4/10/2012 @ 21:29--------------------Pete Rittwage
5/15/2012 @ 01:01----------------------Jim Drew
5/15/2012 @ 01:04------------------------Jim Drew
5/16/2012 @ 09:21--------------------------bluebirdpod
5/16/2012 @ 12:29--------------------------jerrykurtz
4/10/2012 @ 22:28------------------Pete Rittwage
3/27/2012 @ 11:05--------------jerrykurtz
3/27/2012 @ 11:24----------------Pete Rittwage
3/28/2012 @ 09:44------------------hyper active
3/28/2012 @ 21:03------------------Lord Crass
3/04/2012 @ 11:37----Pete Rittwage
3/04/2012 @ 22:36------hyper active
3/20/2012 @ 19:31--J Achernar
3/29/2012 @ 12:01----IFWSPS

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