Sun Microsystems SPARCstation 2 Service Manual page 138

On-Board Diagnostics
Por
POST
printed circuit board
PROM
RAM
ROM
SBus board
security loop
SCC
SCSI
SIA
122
Is 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-On reset TTL open collector signal from the power supply, which is
activated after DC voltages have risen.
Power-On Self-Test. The POST runs automatically when you turn on the
system's power switch or reboot the system. The POST, stored in the boot
PROM, is a series of rudimentary tests designed to verify that a viable boot
path exists for loading more extensive diagnostic software, such as the
Diagnostic Executive.
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.
An internal metal loop used in conjunction with the lock block to provide
protection from unwanted system access.
Serial Communications Controller.
Small Computer System Interface.
Serial Interface Adapter.
SPARCstation2 Field Service Manual—February 1991