System Board Block Diagram - Sun Microsystems SPARCserver 1000 Service Manual

10

10.4 System Board Block Diagram

On-board
ethernet
and SCSI
Slot 1
Slot 2
Slot 3
10-4
Figure 10-2 is a block diagram of the system board. The SPARC modules,
SIMMs, and optional SBus cards are removable and can be replaced or moved
to another SPARCserver 1000 system board.
SBus
Page
table
SBus
Intf.
(SBI)
XBus
I/O Memory
Cache control
(IOC) (MQH)
DRAM
group
Figure 10-2 System Board Block Diagram
Components shown in solid outlines are not field replaceable; if diagnostics
report that a non-removable component failed, replace the entire system board.
SPARCserver 1000 System Service Manual—June 1996
LEDS
SRAM
UARTs
BBC2
SPARC module
CPU
High
speed
cache
Data
Addr
plus
Cache
parity
control
XBus
Bus
watcher
(BW)
DRAM
group
JTAG Control
TODC/NVRAM
EPROM
BootBus
SPARC module
CPU
High
speed
cache
Data
Addr
plus
Cache
parity
control
XBus
Bus BIC
watcher and
(BW) BARB