'Vice 2.3 and illegal GCR/syncs'
Author:Lord Crass (guest: search)
Date: Fri, Apr 15th, 2011 @ 01:21 ( . )

I found that removing the illegal GCR doesn't fix the issue (at least not when I was trying with Harrier Combat Simulator, which hangs on track 22). This track had no sync marks anywhere. Usually there's a short 12 bit one right before sector 0, but in this case it was imaged in as $7E $FF. Same thing noticed for the next 2 tracks it hangs on (12 and 14). Neither of them had a sync mark anywhere. Looking at tracks that worked, they all had a sync mark somewhere.

I also verified that adding a sync mark of 10 bits or more to anywhere in the non-working track (even in the track gap) produced a working track.

Does Vice now require a sync mark on every track to establish proper framing? I suppose that would be more in-line with a real 1541, but I never saw this emulation enhancement mentioned anywhere.

I tried removing the Maverick-added sync mark on track 2 of California Games and it still loads correctly, but that could be due to the loader handling any shift.


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Replies:
--* Vice 2.3 and illegal GCR/syncs
4/15/2011 @ 14:05--Pete Rittwage
4/15/2011 @ 14:54----Lord Crass
4/15/2011 @ 15:25------Pete Rittwage
4/15/2011 @ 17:05--------Lord Crass
4/15/2011 @ 20:06----------Lord Crass
4/15/2011 @ 23:22------------J Achernar

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