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From: cjb@cci632.UUCP (Curtis J. Braun)
Newsgroups: net.micro.pc
Subject: RE:mono Monitor on CGA
Message-ID: <654@cci632.UUCP>
Date: Wed, 5-Nov-86 16:37:03 EST
Article-I.D.: cci632.654
Posted: Wed Nov  5 16:37:03 1986
Date-Received: Thu, 6-Nov-86 03:03:24 EST
Organization: CCI, Communications Systems Division, Rochester, NY
Lines: 19


I would like to respond to a question concering using a  monochrone monitor
on a CGA.
1) on a TTL drive monitor is will work with any. I tied the three RGB
	video drive signals together with a series resister for each
	signal to the video in. This worked well.
2) on a composite monitor it is hard unless the composite signals are
	created from the TTL signals eminating from the RGB port. I had 
	a schematic for one of these somewhere????. I think I've seen these
	advertised somewhere...
3) There are some cards on the market which will do this. But it's been
	a while since I've looked. Check out STB for the best solution.
	I am using a Graphics+2 card with two monitors ( one color, one mono)

Hope this helps, good luck.
PS, the series resistors are needed to allow the anlog drivers to work,
but I don't remember what values I used... sorry.

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