Re: [stella] Strange glitches in homebrewed games on the 2600 jr.

Subject: Re: [stella] Strange glitches in homebrewed games on the 2600 jr.
From: Glenn Saunders <mos6507@xxxxxxxxxxx>
Date: Fri, 28 Feb 2003 09:27:40 -0800
At 10:03 AM 2/28/2003 -0500, you wrote:
Hi Thomas
> Did you check if VSYNC is always enabled long enough?

Yeah, all games (at least the sources that were supplied) do 3 WSYNCs. The VSYNCs in Skeleton don't always happen immediately after a WSYNC and the last VSYNC in 'Qb' doesn't happen immediately after WSYNC but I wouldn't think it would matter that much. Vault Assault also clears the collision registers during verical sync (another access to the TIA). I really wish I had a 2600 jr. to play around with to try different things.


Do we really know this is the cause, though? Homebrewers should try to reassemble their games with more standard VSYNC areas and see if the problems go away.


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