Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!apple!voder!berlioz!gwang
From: gwang@berlioz (George Wang)
Newsgroups: comp.sys.ibm.pc
Subject: Re: [NTSC to RGB] and the other way...
Keywords: Converter
Message-ID: <498@berlioz.nsc.com>
Date: 26 Jul 89 17:21:42 GMT
References: <1391@esunix.UUCP> <1570@mtunb.ATT.COM>
Reply-To: gwang@berlioz.nsc.com (George Wang)
Distribution: na
Organization: National Semiconductor, Santa Clara
Lines: 28

In article <1570@mtunb.ATT.COM> dmt@mtunb.UUCP (Dave Tutelman) writes:
>...And I need just the opposite; anybody got ideas?
>I have a CGA board with ONLY RGB output.  I want to use a B&W monitor
>that takes composite in (and doesn't even need the color burst or
>color signal, just brightness and sync).
>
>Does anybody either know of an inexpensive commercial device to do this
>or a simple circuit that works.  Short of that, does anybody know the
>specs for the RGB interface?  I can design my own circuit.
>

When I brought my Hercules Color Graphics Adapter it came with
it's own 9-pin to RCA phone converter... It's just a small black
adapter... I don't think there's any circuitry in there....
Try asking Hercules if you can buy it alone from them...

Also there was a device called the MISSING LINK which converts
RBG signals for b&W composite monitor use... It converts the
RGB into 16 shades... Very nice product... They sold it
at Elek-Tek in Lincolnwoold, IL.. Elek-tek is a pretty big
computer store... Call toll-free directory assistance for
the number...

Hope this helps...
George
National Semiconductor
VLSI Software Engineer
Gwang@berlioz.nsc.com