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Article #7556Re: ATT Targa-xx, part 2
From: John Chapman
Date: Tue, 09 Sep 1986 05:13
Date: Tue, 09 Sep 1986 05:13
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3406 bytes
We have had news problems so if you have seen a previous posting of these
articles by myself I apologize, but I would like to get any info. that is
floating around out there.
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> > Has anyone out there tried any of these boards with or without AT&T's
> > software? I'm looking for a review.
> >
> > Truevision Advanced Raster Graphics Adapter (TARGA):
> > There are several versions of this board. They all capture in 1/30s from
> > camera or VCR. Hardware zoom (2X, 4X, and 8X). Smooth independent vertical
> > and horizontal scrolling. Bit-pane masking. "Robust" gen-lock capability.
> > Up to 512 x 420 pixel resolution depending on color depth and model.
> ^^^
>
> The vertical resolution is adjustable; mine works fine at 483.
>
.
.
.
> screen copies possible). In its standard configuration, the TARGA has
> a non-broadcast horizontal blanking interval; there are black bands
> to the left and right of the picture visible onscreen. However, an
> option is available to change the timing, making the signal broadcast
> compatible.
Is this the (~$200) overscan option?
Are the pixels square without the option? Are they 5/4 (or any other
'nice' ratio) with the option?
>
> The documentation is superb. Many helpful routines are shipped with
> the board (in Computer Innovations' dialect of C, though I've had
> little trouble rewriting them for QNX C). Between the two, it's been
> very easy to get full function from the TARGA. The frame grabber is
Could you give a brief summary of the software provided with the board?
> very accurate, with no perceptible h-shift or field locking problems.
> The output signal is very clean; there are no transients at intensity
> boundaries, and the picture is quite stable.
>
> Two small problems: With the exander option installed (to adjust the
> blanking interval) the board is a little wider than one slot. Also,
> in my case, the genlock failed after several hours operation, due
> to heat I suspect. It works fine with the cover off the PC, and I
> expect that an expansion box with a fan will solve the problem.
>
> I have not found much use for the blend capability, and would have
> preferred a graphics overlay channel instead. I understand this is
> being considered.
>
> I have alot of software working with this board (z-buffer, utilities, etc.)
> and would be happy to correspond with others about it.
>
> -Steve Miller ihnp4!bellcore!bambi!steve
> Image Space Inc.
> Suite #3
> 125 Washington St.
> Hoboken NJ, 07030
> (201) 798-0429
john chapman
{watmath,ihnp4,uw-beaver}!ubc-vision!sfucmpt!sfulccr!chapman
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!ut-sally!husc6!panda!genrad!decvax!tektronix!uw-beaver!ubc-vision!fornax!chapman From: chapman@fornax.uucp (John Chapman) Newsgroups: net.micro.pc,net.micro.att,net.graphics Subject: Re: ATT Targa-xx, part 2 Message-ID: <3@fornax.uucp> Date: Tue, 9-Sep-86 01:13:42 EDT Article-I.D.: fornax.3 Posted: Tue Sep 9 01:13:42 1986 Date-Received: Tue, 16-Sep-86 22:44:37 EDT Distribution: net Organization: Computing Science Dept, SFU, Burnaby, B.C. Canada Lines: 72