Sun Microsystems SPARCstation 20, Руководство по обслуживанию, Страница: 253 / 266

Glossary 229
Glossary
address Refers to a location within a computer system memory. The word location is a
synonym. Reference is usually made to an address for the purpose of retrieving
or storing information.
AUI port Attachment unit interface port. (The port on the SPARCstation 20 system unit
where the AUI adapter cable is connected.
AVB Auxiliary video board. Supports graphic capabilities when used with a second
VSIMM option.
back up To make a copy of files on media, such as a disk or tape.
board See printed circuit board.
Boot To load the system software into memory and initiate system operation.
boot PROM Refers to the system board OpenBoot™™ PROM chip. This chip contains boot
code and a Forth Monitor program. The OpenBoot PROM is connected to the
I/O data bus.
Boot PROM
diagnostics The diagnostic firmware in the boot PROM. These diagnostics include the
Power-On Self-Test (POST) and on-board diagnostics.
buffer The auxiliary data-storage device that holds data temporarily, and which may
also perform other functions in conjunction with various I/O machines.
cables Wires or bundles of wires configured with connectors at each end and used to
connect two or more hardware devices.
cache A mechanism for accelerating a microprocessor performance. A cache is a
small, fast memory between the microprocessor and main memory.
card See printed circuit board.
CPU Central processing unit.
DAC Digital-to-analog converter.