Newsgroups: comp.sys.ibm.pc
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!cec2!news
From: dale@cec2.wustl.edu (Dale Frye)
Subject: Re: IBM CGA composite output
Message-ID: <1991May2.191320.9661@cec1.wustl.edu>
Organization: Washington University, St. Louis MO
References: <1991Apr24.232935.7148@cbnewsj.att.com> <1710010@hpcc01.HP.COM>
Date: Thu, 2 May 91 19:13:20 GMT

In article <1710010@hpcc01.HP.COM> drudman@hpcc01.HP.COM (Drew Rudman) writes:
>As far as I know, the composite port on ANY CGA card supplies only a black and
>white signal (it samples off of the intensity signal of the CGA.)  No CGA card
>I know of (and I used to sell all kinds - new and used) will provide you with
>a color composite signal.

WRONG!  I've hooked the composite video jack to a composite video color monitor
and (thru a modulator) to a color tv. At 640x200 certain color combonations
don't work very well but there is most definitely color. This was with a
true-blue IBM CGA card. The reason people think it's only B&W is because
most people use that jack to hook up a cheap monochrome display. 

Dale Frye
Washington University in St. Louis

P.S. Come to think about it, when IBM first demo'ed the PC here (1982) they
had the CGA hooked to a Sony tv through the video jack.