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From: heller@LISBOA.KS.UIUC.EDU (Helmut Heller)
Newsgroups: comp.sys.transputer
Subject: Re: Debugging occam programs in a hypercube
Message-ID: <9103070416.AA28047@.lisboa.ks.uiuc.edu.>
Date: 7 Mar 91 04:16:40 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 35

>Felipe writes about problems debugging a network of Transputers. He 

>can not boot the root Transputer as long as there is an error flag 

>set in anyone of the network Transputers.


Felipe,
First let me ask you what kind of motherboard you use (B004, B008, B014) and  
what your host computer (PC, SUN, IRIS) is.
Your problem is that the error signal from the network SHOULD NOT be propagated  
to the host computer (iserver or server14) DIRECTLY (as does, e.g. the UP/DOWN  
port), but should rather be connected to the SUBsystem port of your  
mothertransputer. For unknown reasons (most likely a hardware bug/wrong  
connection/wrong configuration) the network error signal is directly routed to  
your host computer, causing all the problems. 

So, first, check that your network is wired to your SUBSYSTEM port and that  
there are no short circuits.

We are using here a B004, B008, and B014 and we are experiencing similar  
problems in our B014-system --- all the other ones work fine. We think that  
we've checked everything and so I would like to use the opportunity to ask  
people on the net about similar experiences with the B014 board in particular  
(also I would like to know positive experiences with the B014 board).

Cheers, Helmut  (W9/DH0MAD) _________________________________________________
heller@lisboa.ks.uiuc.edu   "Knowledge must be gathered and cannot be given" 

u27013@ncsagate.bitnet                   ZEN, one of BLAKES7                

Phone: (217)244-1586        -------------------------------------------------
Helmut Heller, University of Illinois at Urbana-Champaign, Beckman Institute
Theoretical Biophysics Group, Transputer Lab, Room 3151
405 N. Mathews Ave., Urbana, IL 61801, U.S.A.