![Silicon Graphics Origin 300 User Manual Download Page 176](http://html.mh-extra.com/html/silicon-graphics/origin-300/origin-300_user-manual_1271648176.webp)
150
007-4498-002
A: Technical Specifications
Internal Components
The PCI expansion module contains the following components, which are shown in
Figure A-20 and discussed in the subsections that follow:
•
Bedrock interface card
•
PCI motherboard
•
Power board
•
L1 controller
Bedrock Interface Card (BIC)
The PCI expansion module houses one Bedrock interface card (BIC) that contains a
Bedrock ASIC, a NUMAlink 3 connector, a power connector, and a connector that
connects to the PCI motherboard.
The Bedrock ASIC enables this card to transfer signals between an Origin 300 base
module and the PCI expansion module via the NUMAlink module; the Bedrock ASIC
passes these signals to the Xbridge ASICs that are located on the PCI motherboard. The
Bedrock ASIC receives power from the PCI motherboard via the power connector.
The NUMAlink 3 connector of the BIC is the left connector when you face the rear of the
PCI expansion module. The right connector contains a bulkhead filler plate to maintain
proper airflow through the module.
PCI Motherboard
The PCI motherboard contains 12 PCI slots and three Xbridge ASICs. The Xbridge ASICs
are the interface between the Bedrock ASIC on the BIC and the PCI cards. The PCI
motherboard also contains a serial ID EEPROM that contains component information.
Power Board
The power board contains the logic components of the L1 controller, voltage regulator
modules (VRMs), and a DC-to-DC converter. The VRMs and the DC-to-DC converter
convert the incoming 48 Vdc to voltage levels required by the components within the
module.
Summary of Contents for Origin 300
Page 1: ...SGI Origin 300 System with NUMAlink Module User s Guide 007 4498 002 ...
Page 4: ......
Page 26: ......
Page 39: ...Base System Components 007 4498 002 13 Figure 1 10 L2 Controller ...
Page 49: ...Optional System Components 007 4498 002 23 Figure 1 17 SGI TP9400 Storage System ...
Page 54: ...28 007 4498 002 1 Introduction Figure 1 18 Tape Drive Libraries L20 L40 L80 L180 L700 ...
Page 78: ......
Page 118: ......
Page 264: ......