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From: cshamis@desire.wright.edu
Newsgroups: comp.sys.cbm
Subject: Re: RGB-TV monitor cable
Message-ID: <1991Mar7.184712.2773@desire.wright.edu>
Date: 7 Mar 91 23:47:12 GMT
References: <1991Mar7.163956.2069@nntp-server.caltech.edu>
Organization: University Computing Services, Wright State University
Lines: 39

In article <1991Mar7.163956.2069@nntp-server.caltech.edu>, rknop@nntp-server.caltech.edu (Robert Andrew Knop) writes:
> I am placed in the rather embarassing situation of asking a question which I
> know was recently asked, but to whose answer I didn't pay much attention since
> at the time I didn't think I would ever want or need to know how to do this.
> My question is, where can one get ahold of a cable which will let you display
> the 128's 80 column screen in monochrome on a composite monitor or a TV?
> 
> Thanks,
> 
> -Rob
This might be a little trickier than you think.  (at Leaset for a TV)
(Which is all i know how to do at the moment)  To send the RGBI output to a
TV, the only way I can think of to do it is to use the MONOCROME pin off the
RGBI port, then send that Info, thru to a RF-Modulator.  Then you can send
the RF-out line into the VHF in on your television.  The better the RF
modulator the better your picture will be on the screen...(The TV helps alot
also.)  I know that RadioShack USED to sell a RF-Modulator, that worked real
well with this application.  The RF Mod.  was from the old TI-99/4A computer, I
think it (The RF-M, can still be purchased but Im no longer sure)
The Exact procedure is fairly simple, keep the RF modualtor grounded, and +12
(Maybey +5) volts going thru it, and the MONOCROME-OUT line from the RGBI port,
and remember to use the two synch wires too! theres a H and V both, run them
ALL into the RF-Mods Pinouts, and BINGO your set-up.  Like I saidits been
over 2 years Since I had to use this method but it works.  IF you use the TI's
Modulator the wire colours are thus :
 
  Black - Ground
  Red   - Plus 5v (or plus 12v)
  Yellow- Picture (Monocrome ONLY)
  White - Vsynch
  Brown - Hsynch

Please Its been two years since I messed with this, these MAY not be accurate!
But at least you get the idea of what youll need to do.  

(Hope your handy with a Soldering Gun those 9-pin connectors are a %$@@$&!!!)

CShamis@Desire.Wright.Edu
CShamis@WSU.Bitnet