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From: nclee@sbcs.UUCP (Nai Chi Lee)
Newsgroups: comp.sys.ibm.pc
Subject: Re: CGA Card -> 'RF Modulator' -> Television
Message-ID: <451@sbcs.UUCP>
Date: Thu, 4-Jun-87 15:55:05 EDT
Article-I.D.: sbcs.451
Posted: Thu Jun  4 15:55:05 1987
Date-Received: Tue, 9-Jun-87 02:16:50 EDT
References: <448@slovax.UUCP>
Organization: Computer Science Dept, SUNY@Stony Brook
Lines: 39

> 	Question about the ibm "CGA COLOR GRAPHICS" card. I have a cga card
> 	and also have a mono graphics card.  The mono card will not run
> 	any of the 'cga required' software (ie games). Can I use a color
> 	Television as a cga monitor? If so, how do get the card to emulate
> 	an 'RF Modulator' signal so the TV will receive the signal?
>	.... 
> David Barker     		trwrb ----\

The CGA card cannot produce any RF signal usable by a TV.  You must use
a RF modulator to convert the composite signal (from RCA jack of CGA card)
into RF signal before feeding it into your TV (which is set to either
Channel 3 or 4).

Here are some of your solutions:

1. You can buy a stand-along RF modulator from Radio Shack for about $25,
   or you can get one of those match-box sized internal RF modulator for $5
   to $10 and solder it inside your PC.

2. If you have a VCR, you can use it to do the modulation by connecting
   the composite signal to the "video in" jack at the back of the VCR.

3. Forget about color TV, use a Princeton MAX-12E monochrome monitor which
   is capable of displaying CGA output signal in 16 grey levels.  You can
   manually switch the monitor input cable between mono card and CGA card.

4. Forget about color TV and CGA card, run SIMCGA which emulates CGA on a
   Hercules mono card.  However, only some well-behaved games will work.
   (e.g. Art Of War, Bushido, Alley Cat, Cross Fire, Big Top, Zaxxon, ...)

Please be advised: some mono programs cannot run properly when you have both
CGA and Hercules cards inserted.  Microsoft "Windows" is one of them.

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