Compaq AlphaServer 1000A Owner's Manual page 182

Glossary
data cache
A high-speed cache memory reserved for data storage.
DEC VET
Digital Verifier and Exerciser Tool. A multipurpose system diagnostic tool that performs
exerciser-oriented maintenance testing.
DECchip 21064 processor
The CMOS, single-chip processor based on the Alpha architecture and used on many
AlphaGeneration computers.
diagnostic program
A program that finds and corrects problems with a computer system.
Digital UNIX operating system
A general-purpose operating system based on the Open Software Foundation OSF/1 2.0
technology. Digital UNIX V2.0 runs on the range of AlphaGeneration systems, from
workstations to servers.
direct memory access (DMA)
Access to memory by an I/O device that does not require processor intervention.
DSSI
Digital's proprietary data bus that uses the System Communication Architecture (SCA)
protocols for direct host-to-storage communications.
DSSI cluster
A cluster system that uses the DSSI bus as the interconnect between DSSI disks and
systems.
DUP server
Diagnostic Utility Program server. A firmware program on-board DSSI device that allows
a user to set host to a specified device in order to run internal tests or modify device
parameters.
ECC
Error Correction Code. Code and algorithms used by logic to facilitate error detection and
correction.
Glossary - 4