7.2 System Issues for Upgrades
7.2 System Issues for Upgrades
Note
Observe the following configuration rules:
•
Every DECmpp system must have the correct number of supported
PE array PCBs. DECmpp 12000 systems may have 1, 2, 4, 8, or 16
PE array PCBs. DECmpp 12000–LC systems may have 1, 2, or 4 PE
array PCBs. No other combinations are supported.
•
When you add PE array PCBs, you must change the data parallel
unit (DPU) backplane X-Net jumpers.
•
PE array PCBs start in the first PE array PCB slot and occupy
contiguous slots up to the maximum installed. Each remaining PE
array PCB slot must have a router PCB installed. No PE array PCB
slot can be left empty.
No system software changes are required. The system software automatically
reconfigures itself to accommodate any supported number of PE array PCBs when
booted.
With one exception, DPU programs run on any legal size PE array (1, 2, 4, 8, or
16) and increasing the array size increases the run speed. However, if you have
hard-coded the size of the processor array in a DECmpp Programming Language
(MPL) program, the program may need to be changed and recompiled before
being run on a different-sized PE array.
Backplane Jumpers and Upgrading PE Arrays 7–7
Содержание DECmpp 12000/Sx 100
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