Configuring Simms And Jumpers; Simm Configuration; Board Rules - Sun Microsystems SPARCserver 1000 Manual

A.1 SIMM Configuration
A.1.1 SPARCserver 1000 and SPARCserver 1000E System Board Rules
Configuring SIMMs and Jumpers
Use this appendix to identify SIMM slot locations and to verify system board
jumper settings.
The SPARCserver 1000 system board has one bus, and all SIMM groups are
attached to this bus. The SIMM slots on each board, sixteen in all, are divided
into four groups of four slots each. The SIMM groups are numbered from 0 to
3. The SIMM slot locations are shown in Figure A-1, organized by groups.
•
Each 64-bit data-word is distributed among four SIMMs, which make up a
group.
•
When SIMMs are installed onto a board they must be installed in sets of
four, so that 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.)
•
Do not mix SIMM sizes within a group. All SIMMs installed in a given
group must be of the same capacity, either 1 Mbyte (for NVSIMMs), 8
Mbyte, or 32 Mbyte. SIMMs from different manufacturers may be mixed
together in a group, provided the SIMMs are of the same capacity.
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