Re: [stella] Videotaping games

Subject: Re: [stella] Videotaping games
From: Eckhard Stolberg <Eckhard_Stolberg@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Jul 1999 16:05:58 +0200
At 08:07 27.07.99 -0500, you wrote:

>Any ideas on this? Is the video output on Edtris and TPS different such
>that it syncs to the TV screen but not to the videotape?

In VCS games doing the sync signal properly is left entirely to the
programmer. Oystron does a WSYNC right before it turns on the VSYNC
signal and then does three more WSYNCs before it turns VSYNC off again.
This way it makes sure that the signal is left on for three full scanlines.

TPS doesn't do the first WSYNC. Therefore it might actually generate
the vertical sync signal only for two and a half scanlines or so. This
might be good enough for your TV, but not good enough for the record
feature of your VCR.


Ciao, Eckhard Stolberg
 


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