AVB
SBus card
MBus module
DSIMM module
VSIMM or
NVSIMM module
Clock speed
jumper
Serial port
NVRAM/TOD
jumpers
OpenBoot PROM
Note: NVRAM/TOD carrier not illustrated.
Major Components of the System Board
FIGURE 12-3
188
SPARCstation 20 Service Manual • July 1996