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PPMAC and Macro CPU in the same UMAC rack
#1
We have a machine that is running software using a UMAC chassis with a MACRO CPU that is controlled by a Turbo PMAC Ultralite. We would like to experiment with transitioning the application to utilize the PPMAC but would like to maintain all of the UMAC wiring etc., so that the machine could be run as normal by switching control back to the MACRO CPU. Is it possible to alternately command the PPMAC or MACRO CPU to "dummy up" and not talk to the UMAC hardware so that we would not have to pull CPU cards to do that (while progressively developing the PPMAC application)?
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#2
Unfortunately this is not possible. Both cards will try to communicate on the backplane and send conflicting data. You can only have one CPU in the rack at all times.
Sina Sattari
Hardware Engineering Manager
Delta Tau Data Systems, Inc.
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