Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!bbn.com!jclesius
From: jclesius@bbn.com (Jeff Clesius)
Newsgroups: comp.sys.mac.hardware
Subject: RGB cabling to IIci / Multiple monitors
Summary: Need help determining cabling requirements
Message-ID: <63783@bbn.BBN.COM>
Date: 18 Apr 91 14:00:33 GMT
Sender: news@bbn.com
Reply-To: jclesius@labs-n.bbn.com (Jeff Clesius)
Distribution: usa
Organization: Bolt Beranek and Newman Inc., Cambridge MA
Lines: 31

Does anyone have any experience creating cables to connect non-Apple
RGB monitors to the built-in video port on the Mac IIci?

I currently have a Radius 19" TPD display hooked up with an interface
card as the main monochrome monitor and would like to also add an Amiga
1080 RGB color monitor as a supplementary display.  The salesperson at
the computer store indicated that when hooked up, the monitor on the
built-in connector should show up in the control panel in the monitor
setup.  However, even with both monitors connected, only the Ra
dius display appears in the control panel setup.

I believe that it has something to do with the cabling.  I have connected
the CSYNC, RED, RED.GND, BLU, BLU.GND, GRN, GRN.GND, and the C&VSYNC.GND
lines from the Mac to the monitor.  How do I hook up the MON.ID1, MON.ID2,
and MON.ID3 lines?  I think that the fact that these lines are not connected
is the reason why it does not show up in the control panel... but I really
can't be sure.  Can anyone help me out with this?

Also, if someone who is currently using multiple monitors could shed some 
light as to how to best place them to eliminate cross-interference, it would
be most appreciated.


Many thanks!

Jeff Clesius
BBN Systems and Technologies
50 Enterprise Ctr.
Middletown, RI 02840
(401) 849-2543
jclesius@bbn.com