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From: jnl@inuxh.UUCP (John Le)
Newsgroups: net.micro.att
Subject: Re: Overriding builtin video circuits on 6300
Message-ID: <460@inuxh.UUCP>
Date: Fri, 8-Aug-86 08:36:24 EDT
Article-I.D.: inuxh.460
Posted: Fri Aug  8 08:36:24 1986
Date-Received: Sat, 9-Aug-86 11:08:31 EDT
References: <134@rruxqq.UUCP>
Organization: AT&T Consumer Products, Indianapolis
Lines: 27

> Does anyone out there know how to configure an AT&T 6300 to use a
> video card external to what is onboard?  I know there is an additional
> ega card, but is there some means to override the onbard
> monochrome/clor graphics video output circuits and use a standard
> monochrome card, hercules color card, etc.  I have an application that
> MUST use the monochrome & color graphics video output simultaneously.
> (Please don't tell me that it can't be done, I know it has to be able to be
> done somehow...)  Thanks in advance.
> -- 
> Pat M. Iurilli  Bell Communications Research  Piscataway, NJ
> {allegra, ihnp4, topaz}!rruxqq!pat

The following notes I saved from the net awhile back may help you:

"To put in another graphics board you must first disable your present board. To
do this you remove a 74LS00 chip located on the bottom middle of the graphics
board.  It is above where the +5 volts and ground wire connect. In newer
machines it is in a socket on older ones it is soldered in. NOTE this will
void your warranty if you do it yourself! After removing the chip then pins 7&6
must be jumpered together and 3,8,11,14 must all be tied together.  We got
this fix directly from AT&T. We just bought 300 of these units and some will be
modified."

	John N. Le (AT&T IS/CPL Indpls, IN)
	ihnp4!inuxh!jnl

PS: No disclaimer.... redirect any flames to /dev/null.