memory. It quickens a microprocessor access time to main memory.
It also stores the most recently used information (data, instructions,
etc.), and provides such information again to the microprocessor
more rapidly than could main memory.
card See printed circuit board.
CPU
Central processing unit.
CRU
Customer Replaceable Unit.
Desktop Backup
Pack
An external unit containing a tape drive that can be connected to a
SPARCstation 10 system.
Desktop Disk Pack
An external unit containing a disk drive that can be connected to a
SPARCstation 10 system.
Desktop Storage
Module
An external data storage that contains a disk drive or a tape drive.
Desktop Storage
Pack (DSP)
A generic name for an external unit containing a tape drive, disk
drive, or a CD-ROM drive that can be connected to a SPARCstation
10. The external unit containing the tape drive is referred to as the
Desktop Backup Pack. The external unit containing a disk drive is
specifically referred to as the Desktop Disk Pack. The external unit
containing a compact disc drive is specifically referred to as the
Desktop SunCD Pack.
Desktop SunCD
Pack
An external unit containing a compact disc drive.
Diagnostic
Executive
See SunDiagnostic Executive.
DMA Direct Memory Access.
DRAM Dynamic Random Access Memory.
DSIMM
DRAM Single Inline Memory Module. A small printed circuit card
that contains dynamic random access memory (DRAM) chips.
Ecache External cache is a cache that is located external to the
microprocessor. See cache.
ESM
External Storage Module. An external unit that contains disk and/or
tape drive(s) that can be connected to a SPARCstation 10.
Glossary-200
SPARCstation 10 Service Manual ♦ Revision A, July 1993
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