Experimental Physics and
Industrial Control System

Kate Feng <[email protected]> · Tue, 29 Aug 2006 21:19:00 -0400

Andrew Johnson wrote:

> Kate Feng wrote:
> > Andrew Johnson wrote:
> >
> >>This doesn't mean that the existing drivers won't work; the vast
> >>majority of the time they will be fine.  They will not be robust in the
> >>presence of unexpected bus errors though.
> >
> > And this problem rises only if the mvme6100 is used as a
> > system controller.   It will be fine if it's used a non system
> > controller.
>
> No, that is incorrect.  The problem relates to the onboard interface
> between the CPU, its local PCI bus and the PCI to VME bridge chip; it is
> not at all related to whether the VME interface chip is acting as the
> VMEbus system controller or not.

I meant if one use mvme5500 as the system controller, and mvme6100 as a
2nd CPU.  In this case, mvme5500 is a VME master.  In your message :
http://www.aps.anl.gov/epics/tech-talk/2006/msg00887.php
It stated that "If the transaction was a VMEbus read, the VME Master
completes the Linkage Module command by
filling the buffer with a data pattern of all ones. "  This only applies
if the master CPU used the Tsi148 chip.

I am sorry, but I had trouble in obtaining the document for the Tsi148.
I had E-mail them since last week.

Kate

>
>
> - Andrew
> --
> There is considerable overlap between the intelligence of the smartest
> bears and the dumbest tourists -- Yosemite National Park Ranger

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System