Sun Microsystems SPARCstation 5 Service Manual page 173

LED
Location
MBus module
Monitor (1)
Monitor (2)
MMU
NVRAM
On-Board
Diagnostics
Pok
POST
printed circuit board
PROM
RAM
ROM
SBus card
SCC
SCSI
Light-emitting diode.
See address.
A printed circuit board installed in an MBus slot of the system unit
that contained the CPU circuitry and components.
Indicated by the > prompt. From the > prompt, you can boot the
system, continue the execution of a halted program, or enter the
FORTH Toolkit.
A video display unit that is part of the SPARCstation 5 system. It is
not synonymous with terminal.
Memory management unit.
Nonvolatile RAM.
A test that allows you to test the control registers, the network
controller, the diskette drive system, memory, the cache, the system
clock, and watch the network for valid packets.
Power ok. A signal from the power supply that is activated after DC
voltages have risen.
Power-On Self-Test. The POST runs when you turn on the system
power switch or reboot the system and press and hold the L1-d
keys. The POST, stored in the boot PROM, is a series of rudimentary
tests designed to verify that the major components on the system
board are working properly.
Any board with electronic wiring etched on it.
Programmable read only memory.
Random access memory.
Read only memory.
A printed circuit board installed in an SBus slot of the system unit.
Serial communications controller.
Small computer system interface; pronounced "scuzzy."
Glossary-159