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<== Date ==> <== Thread ==>

Subject: FW: VME Bus Error handling on MVME3100 and 6100 boards
From: "Thompson, David H." <thompsondh@ornl.gov>
To: tech-talk@aps.anl.gov
Date: Thu, 17 Aug 2006 11:47:52 -0400
Our V124s don't have to be smoked to cause a bus error.

I don't have to be able to debug it to know what is going on. 

I do want to know that something happened rather than passing 0xffff up
into the control loop.

========== Response from Motorola below ===============================

Motorola has received the fiollowing response from an engineer that was
involved with the TEMPE and from Tundra:

Tundra states that "the error handling with respect to a BERR
termination as a VMEbus master works as described in the Users Manual.
Tundra has no plans of changing this."  If the customer doesn't feel
that signaling via an interrupt is insufficient then we have no
recourse.  Please note that both Mac and Tundra agree that a failed read
of a valid VME address would likely occur only as a result of a
catastrophic system failure, i.e. the target board smoked.  The
probability that a failed read, when (or if) retried would return data
is essentially zero.
========================================================================

Not sure, what to make out of that initial response?




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