DEC 4000 AXP Service Manual page 214

cache
See cache memory.
cache block
The fundamental unit of manipulation in a cache. Also known as cache line.
cache interference
The result of an operation that adversely affects the mechanisms and procedures
used to keep frequently used items in a cache. Such interference may cause
frequently used items to be removed from a cache or incur significant overhead
operations to ensure correct results. Either action hampers performance.
cache line
The fundamental unit of manipulation in a cache. Also known as cache block.
cache memory
A small, high-speed memory placed between slower main memory and the
processor. A cache increases effective memory transfer rates and processor speed.
It contains copies of data recently used by the processor and fetches several
bytes of data from memory in anticipation that the processor will access the next
sequential series of bytes.
card cage
A mechanical assembly in the shape of a frame that holds modules against the
system and storage backplanes.
CD–ROM
Compact disc read-only memory. The optical removable media used in a compact
disc reader mass storage device.
central processing unit (CPU)
The unit of the computer that is responsible for interpreting and executing
instructions.
channel
A path along which digital information can flow in a computer.
checksum
A sum of digits or bits that is used to verify the integrity of a piece of data.
Glossary–4