Sun Microsystems SPARCstation 4 110 Service Manual page 171

Glossary
address
A RMS
attachment unit
interface (AUI) port
boot
boot PROM
boot PROM
diagnostics
buffer
cache
CRU
DMA
DRAM
DSIMM
Ecache
A location within a computer system memory. Reference is usually made to an
address for the purpose of retrieving or storing information.
Amperes root mean square. RMS is often used in power measurements for
electronic equipment.
The port on the SPARCstation 4 system unit rear panel where the AUI adapter
cable is connected.
To load the system software into memory and start the system running.
A specific PROM chip on the system board. This chip contains boot code and a
FORTH Monitor program. The boot PROM is connected to the I/O data bus.
The diagnostic firmware contained in the boot PROM. These diagnostics
include the Power-On Self-Test (POST) and on-board diagnostics.
The auxiliary data-storage device that holds data temporarily, and that may
also perform other functions in conjunction with various I/O machines.
A mechanism for accelerating a microprocessor performance. A cache is a
small, fast memory between the microprocessor and main memory. It stores the
most recently used information, and provides that information again to the
microprocessor more rapidly than could main memory.
Customer-replaceable unit.
Direct memory access.
Dynamic random access memory.
DRAM single in-line memory module. A small printed circuit card that
contains dynamic random access memory (DRAM) chips.
External cache. Cache that is located external to the microprocessor. See also
cache.
Glossary-1