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From: bammi@cwruecmp.UUCP (Jwahar R. Bammi)
Newsgroups: net.micro.atari
Subject: Re: ST 520 and Commodore 1702 color monitor
Message-ID: <1376@cwruecmp.UUCP>
Date: Fri, 17-Jan-86 00:43:39 EST
Article-I.D.: cwruecmp.1376
Posted: Fri Jan 17 00:43:39 1986
Date-Received: Sat, 18-Jan-86 08:16:28 EST
References: <98@ecn-aa.UUCP>
Organization: CWRU Dept. Computer Eng., Cleveland, OH
Lines: 46

> 
> Does anyone know if a monochrome ST can be used with a Commodore 1702
> RGB monitor (after unplugging the monochrome monitor of course)?
> 
> Another way of stating this question: Is the color output of the ST so
> unusual that a non-Atari color monitor cannot be used?
> 
> Thanks.
> 
>     Whom: Rick Westerman                       Phone: +1-317-494-8341
>     UUCP: {decvax, ihnp4, seismo, ucbvax}!pur-ee!westerm
>     ARPA: westerm@purdue.ecn.ARPA
>     USPS: Ag Data Network, Purdue University, West Lafayette IN 47907

*** REPLACE THIS LINE WITH YOUR MESSAGE ***
Here is a simple circuit that I picket off compuserve a while back
to hook a ST to an Analog RGB (not digital or RGBI monitors that
are hooked to Ibms and te like) monitor. I have not tred it myself,
but I have hear from other people that it works.NOTE: those
resistors are supposed to be important, so don't skip them.



From Steve Katz:
Hi again! Well... The resistors are 1.2K and are not tied to ground, but are in
line (I think thats what you call it).

Atari                            RGB Monitor
Pin  Signal			Signal
 7    R------------~~~~------------R monitor
 6    G------------~~~~------------G
10    B------------~~~~------------B
 9    H Sync-----------------------H sync
12    V Sync-----------------------V sync
13    Ground-----------------------Ground

         with ~~~~ meaning 1.2K resistor (Brown Red Red).

 It works as I am using it right now! Good luck..SSFN!

-- 
					Jwahar R. Bammi
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