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Article View: comp.sys.next.hardware
Article #1330

Instructions on modifying CPU board for multi-CPU NeXTcube

#1330
From: Brian Willoughby
Date: Thu, 31 Dec 1992 10:41
23 lines
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	I have heard from other UseNet folks that there was a posting (a long  
time ago) in comp.sys.next about how to modify a NeXTcube CPU board so that it  
would function in a different slot than the standard one - and also so it would  
not interfere with a second CPU board in the main position.  I believe this  
involved electrical modifications to the NeXTbus chip so that only power would  
come from the bus.  I don't believe there was any need to modify the monitor  
outputs, since the NeXTcube can handle a NeXTdimension setup with nothing  
plugged into the mono output of the main CPU (unlike the NeXTstation which  
doesn't like an open circuited monitor output).  This modified CPU board could  
then be networked to an unmodified main CPU for additional processing.
	Does anyone have a copy of this posting that they could e-mail to me?   
If not, can anyone remember when it was posted?  (perhaps I could try grep'ing  
through the comp.sys.next archives if I could narrow down the search to a  
specific time frame).

P.S.  My interest has been renewed in this hack upon pondering the possibility  
of obtaining a NeXTcube Turbo board and then modifying my original 25 MHz '040  
board to operate my Optical Disk from another slot in my NeXTdimension system.
-- 
Brian Willoughby	Software Design Engineer, BSEE NCSU
BrianW@SoundS.WA.com	Sound Consulting: Software Design and Development
NeXTmail welcome	- NO EMAIL SOLICITATION without prior permission
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Newsgroups: comp.sys.next.hardware
Path: arc1-ca.pugleaf.net!sparky!uunet!nwnexus!sounds!brianw
From: BrianW@SoundS.WA.com (Brian Willoughby)
Subject: Instructions on modifying CPU board for multi-CPU NeXTcube
Message-ID: <C04DoL.L6J@sounds.wa.com>
Sender: brianw@sounds.wa.com (Brian Willoughby)
Reply-To: BrianW@SoundS.WA.com
Organization: Sound Consulting, Bellevue, WA, USA
Date: Thu, 31 Dec 1992 10:41:08 GMT
Lines: 23