🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.sys.ibm.pc
Article #14540

Color composite from a CGA (again)

#14540
From: Randy Horton
Date: Mon, 24 Nov 1986 09:39
25 lines
1793 bytes
A few months ago, I posted a query about how to use a color monitor with
the composite output of a CGA card.  Not surprisingly, I received a number of
responses informing me that the composite output of a CGA (or clone) IS a
color signal.  I have finally discovered that yes, it is a color output, but
only in 40col mode.  As soon as I switch to 80col, the display will only
appear in B&W.  The resistor network that someone kindly suggested does not
work, and I cannot afford the > $500 for the RGB to composite converter that
someone else suggested.

My question now is, is there a way to make the CGA put out a color signal from
the composite output jack while in 80col mode?  
I must admit that I am rather dubious that this can be accomplished, but I
am loathe to get rid of a perfectly good, not too old, CBM composite
monitor.  This monitor is especially convenient since it has two switch
selectable inputs.  While I am waiting for a long compile, I just switch
the input to the C64 and play Zaxxon while I wait :-)                     

As always, any help would be appreciated.
-- 

(Randy Horton)      allegra|                        
		    hplabs |                        
		    topaz  |-!pyramid!ranhome!randy 
		    decwrl |                        
Technical Details
Message-ID: <207@ranhome.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-crg!lll-lcc!pyramid!ranhome!randy

Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-crg!lll-lcc!pyramid!ranhome!randy
From: randy@ranhome.UUCP (Randy Horton)
Newsgroups: comp.sys.ibm.pc
Subject: Color composite from a CGA (again)
Message-ID: <207@ranhome.UUCP>
Date: Mon, 24-Nov-86 04:39:04 EST
Article-I.D.: ranhome.207
Posted: Mon Nov 24 04:39:04 1986
Date-Received: Mon, 24-Nov-86 22:20:34 EST
Reply-To: randy@ranhome.UUCP (Randy Horton)
Organization: AT Home in Palo Alto CA
Lines: 25