Sun Microsystems SunSwift SPARCserver 1000, Руководство по обслуживанию

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B-1
SIMMs and Jumpers
B
Use this appendix to identify SIMM slot locations and to verify system board
jumper settings.
B.1 SIMM Configuration
B.1.1 System Board Rules
•
Each system board has slots for sixteen SIMMs divided into four groups of
four SIMMs each. See Figure B-1.
•
Each 64-bit data-word is distributed among four SIMMs, which make up a
group.
•
When SIMMs are loaded onto a board they are installed in sets of four, so
the lowest numbered group is completely filled first.
•
SIMMs can only be installed in groups of four, hence you can have zero,
four, eight, twelve, or sixteen SIMMs installed on a given system board.
•
SIMM socket numbers (J-numbers) are printed on the back of the system
board. (J-numbers refer to the socket locations. U-numbers refer to the
corresponding devices that fit in the sockets.)
•
All SIMMs installed in a given group must be of the same capacity; 1 Mbyte
(for NVSIMMs), 8 Mbyte, or 32 Mbyte. SIMMs from different manufacturers
may be mixed within a group, provided the SIMMs are of the same capacity.