RE: [stella] interlace

Subject: RE: [stella] interlace
From: "Gene Johannsen" <gjohannsen@xxxxxxxx>
Date: Fri, 23 Jun 2000 15:16:47 -0700

Is it even possible for the 2600 to produce a proper television signal?  If so,
how?  This might be an additional challenge that game programmers may want to
take on.


> -----Original Message-----
> From: owner-stella@xxxxxxxxxxx [mailto:owner-stella@xxxxxxxxxxx]On
> Behalf Of Chris Wilkson
> Sent: Friday, June 23, 2000 2:59 PM
> To: stella@xxxxxxxxxxx
> Subject: Re: [stella] interlace
> On Fri, 23 Jun 2000, Matthew W. Miller wrote:
> > The seemingly counter-intuitive thing about using video-cassette recorders
> > with console systems (not just the VCS, or even Atari systems in general)
> > is that you may have an easier time using a cheap low-end recorder rather
> > than a high-end or commercial one!  The reason for this is that high-end
> > recorders tend to both send, and expect, highly precise 60-Hz pulses of
> > the signal, whereas low-end recorders tend to slack off on both ends.  So
> > you might very well have less trouble recording with an off-brand (sorry
> > Chris) than a name-brand like Mitsubishi.  I believe this was discussed by
> > the Stella at 20 guys a while back -- check the archives.
> Also, 3 scanlines of VSYNC is *not* enough.  To be standard, at any rate.  :P
> If you add a few more sync pulses, it's better.  I forget what the "official"
> correct number is, (Glenn?) but it's higher.  3 is about the absolute minimum
> that most TVs will sync to.  Newer, fancier equipment does expect to get
> a correct signal.  Not an unreasonable expectation, but sometimes not good.
> Anyone remember why can't you do calculations during VSYNC?  I remember the
> discussion (a couple years back), but I don't remember the details.
> -Chris
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