1-12 ES45 Owner’s Guide
1.7 System Motherboard
The system motherboard is located on the floor of the system card cage
and has the majority of the logic for the system.
The system motherboard has connectors for the CPUs and memory mother-
boards (MMBs) and a connector to the I/O subsystem. Figure 1–6 shows the
location of these modules on the motherboard.
Figure 1–6 System Motherboard Block Diagram
MMB3
MMB2
MMB1
MMB0
J34
J33
J32
J31
CPU2
CPU0
CPU1
CPU3
J18
J17
J16
J15
Connector to PCI Backplane
Vterm
(VTerm_data)
Cterm
(VTerm_chk)
PK0323C
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