Sun Microsystems SunSwift SPARCserver 1000, Manual

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C-4 SPARCserver 1000 System Board Manual—October 1994
C
The example in Table C-2 shows how to distribute five FSBE/S and two SPIFFs
on three system boards.
C.1.4 SIMMs
The SPARCserver 1000 system has three SIMM options. Two types of DRAMs,
high-density and low-density, are available as well as nonvolatile NVSIMMs.
The 8 Mbyte (low-density) SIMMs use 1 Mbit by 4 bit DRAMs. Two vendors
are used, so there is a slight variation in physical appearance between the two
products. Refer to Figure C-3.
The 32 Mbyte (high-density) SIMMs use 4 Mbit by 4 bit DRAMs. Each vendor
uses the same printed circuit card for both the 8 Mbyte and 32 Mbyte SIMMs,
so there is no major difference in appearance between a given vendor’s high-
and low-density SIMMs.
There is only one type of 1 Mbyte NVSIMM, which uses 128 Kbit by 8 bit
SRAMs. Refer to Figure C-3.
Table C-2 Example of SBus Card Distribution
System Board Location SBus Cards Installed
Slot 0 2 FSBE/S and 1 SPIFF
Slot 1 2 FSBE/S and 1 SPIFF
Slot 2 1 FSBE/S