Digital Equipment AlphaServer 2000, Owner'S Manual

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data cache
A high-speed cache memory reserved for the storage of data.
Abbreviated as D-cache.
DECchip 21064 processor
The CMOS, single-chip processor based on the Alpha AXP
architecture and used on many AlphaGeneration computers.
DEC OSF/1 Version 2.0 for AXP systems
A general-purpose operating system based on the Open Software
Foundation OSF/1 2.0 technology. DEC OSF/1 V2.0 runs on the
range of AlphaGeneration systems, from workstations to servers.
DEC VET
Digital DEC Verifier and Exerciser Tool. A multipurpose system
diagnostic tool that performs exerciser-oriented maintenance
testing.
diagnostic program
A program that is used to find and correct problems with a
computer system.
direct-mapping cache
A cache organization in which only one address comparison is
needed to locate any data in the cache, because any block of
main memory data can be placed in only one possible position in
the cache.
direct memory access (DMA)
Access to memory by an I/O device that does not require
processor intervention.
DRAM
Dynamic random-access memory. Read/write memory that must
be refreshed (read from or written to) periodically to maintain
the storage of information.
DSSI
Digital’s proprietary data bus that uses the System
Communication Architecture (SCA) protocols for direct
host-to-storage communications.
Glossary–6