User's Manual

3-6 UltraEnterprise6000/5000/4000 Systems Manual—November1996
3
Figure 3-3 CPU/Memory Board Simplified Block Diagram
3.4.1 Removing a Board
3.4.1.1 RemovingaBoardfromaPoweredOnSystem
Caution – Remove a board from a powered on system only after the ASR
software has disabled the board. If a board has not been disabled by the ASR
software, then the operating system should be halted and the system powered
off prior to board removal. See Chapter 12, “Powering Off and On” and then
see Section 3.4.1.2, “Removing a Board from a Nonpowered On System.”
Centerplane Connector
Data (8)
Address
controller
Memory (16 x 72 bit SIMMs)
Address
Data
UltraSPARC
module
UltraSPARC
module
Control
Address
Data
Data
Address
RAS/CAS
Control
controller
Bootbus
controller
Bootbus
On-board devices
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