Sun Microsystems 6000, 4000, 5000 - page 226

B-2 UltraEnterprise 6000/5000/4000 Systems Manual—November 1996
B
Enterprise card cages feature a high-speed (2.6 Gbyte per second) centerplane
bus. Boards at the front of the centerplane must be installed component side
down, while boards at the back must be installed component side up. The
boards are oriented this way to allow for minimum signal trace lengths and
optimum system performance.
FigureB-1 illustrates the logical organization of Enterprise systems.
FigureB-1 Enterprise System Logical Organization
I/O board
SBus 1 SYSIO 1
SYSIO 0
SBus 0
8x Data
controller
Address
controller
Address bus
Data bus
CPU/Memory board
CPU 1
CPU 0
8x Data
controller
Address
controller
Memory
I/O board
SBus 1 SYSIO 1
SYSIO 0
SBus 0
8x Data
controller
Address
controller
CPU/Memory board
CPU 1
CPU 0
8x Data
controller
Address
controller
Memory