Figure 4-2 Ix-Brick Block Diagram - Silicon Graphics Origin 3900 User Manual

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Three PIC (PCI interface chip) ASICs are key components of the IX-brick architecture.
These ASICs support two 1200- or 800-MB/s Xtown2 XIO ports and six PCI-X buses (see
Figure 4-2). Each bus has two card slots in which you can install PCI cards. (Slot 1 of bus
1, however, seats the IO9 card.)
PIC
Port F
ASIC
Port D (XIO)
Port D (XIO)
Port A
(XIO)
PIC
Port F
ASIC
Port B
(XIO)
Port C (XIO)
Port D (XIO)
PIC
ASIC Port F
IX-brick Block Diagram
Figure 4-2
Crosstown2 XIO port
Crosstown2 XIO port
DVD-ROM
IO9 PCI card
SCSI disk drives (2)
Bus 6 slot 2
Bus 6 slot 1
Bus 5 slot 2
Bus 5 slot 1
Bus 4 slot 2
Bus 4 slot 1
Bus 3 slot 2
Bus 3 slot 1
Bus 2 slot 2
Bus 2 slot 1
Bus 1 slot 2
Bus 1 slot 1
Ethernet port
SCSI port
RTI ports
Serial ports
Product Overview
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