Sun Microsystems SunSwift SPARCserver 1000, Service Manual

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E-8 SPARCserver 1000 System Service Manual—June 1996
E
The example in Table E-2 shows how to distribute five FSBE/S cards and two
SPIFFs on three system boards.
E.3.3 SIMMs
The SPARCserver 1000 system has three SIMM options. Two types of DRAM,
high-density and low-density, are available as well as nonvolatile NVSIMM.
The 8 Mbyte (low-density) SIMMs use 1Mbit by 4bit DRAMs. Two vendors are
used, so a slight variation exists in physical appearance between the two
products. See Figure E-4.
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- and 32 Mbyte SIMMs, so no
major difference in appearance exist between a given vendor’s high- and low-
density SIMMs.
The 1 Mbyte NVSIMM uses 128 Kbit by 8 bit SRAM. See Figure E-4.
Table E-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