plm@psuecl.BITNET (06/04/86)
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.
All the usual disclaimers, ect...
Paul L. Marcuzzo
Penn State University
v1b@mhuxi.UUCP (davis) (06/06/86)
> 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. > > All the usual disclaimers, ect... > > Paul L. Marcuzzo > Penn State University > > Paul, What monitor are you are using with your modified AT&T pc6300?? (I would have sent directly to you but I don't know how to mail to BITNET) What I really want to do is use an ega card in my PC6300 (doing the modification you did) along with the AT&T color monitor I already have. My problem is that since the AT&T color monitor has a non standard plug, I have been unable to find an ega board I could plug it into. Any ideas would be greatly appreciated. Vern Bradner ihnp4!mhuxi!v1b