Micronics PCI/ISA System Board D6-IN Manual de usuario descargar pdf (Pagina 77)

M6DPi System Board Manual

SRAM - An acronym for Static Ran-

dom Access Memory. A type of

memory that can retain data without

requiring a regular clock signal. Al-

though they are faster than DRAM,

they hold less data and are more ex-

pensive.

Synchronous - Protocols that require

the clocks of communicating ma-

chines or devices to be coordinated.

Synchronous Cache - A type of cache

that uses a clock signal to latch the

inputs and the data output. This struc-

ture spreads the cache access across

two or three cycles while maintaining

a bandwidth of one access per cycle.

Improves performance by 5-10%.

Terabyte - A measurement for very

large storage capacity. One Terabyte

is equivalent one-thousand gigabytes,

one-million megabytes, or

1,099,511,627,766 bytes.

Unbuffered DIMMs - The unbuffered

DIMM modules do not use any buffer

logic chips, thus achieving faster op-

eration due to the elimination of the

propagation delay of the logic buffer.

This increase in speed comes at the

cost of reducing the maximum num-

ber of modules on the same system

board.

VESA - An acronym for Video Elec-

tronics and Standards Association.

VESA Local Bus (VL-Bus) - A high

performance bus designed by VESA.

A 32-bit version of the ISA bus which

Glossary

75

operates at the speed of the

computer’s CPU. See PCI, EISA and

ISA.

VRM - Voltage Regulator Module.

Supplies CPU specific voltages for the

Secondary CPU.

Warm Boot - Restarting the system

by simultaneously pressing the

<Ctrl>, <Alt> and <Delete> keys.

Wide SCSI - A SCSI-2 enhancement

that allows data to be transferred 16

or 32 bits at a time on the SCSI bus

instead of 8 bits at a time.

Write-Back Cache - Upon a cache

hit, the cache is updated and the main

memory is not affected. Upon a cache

miss, only the main memory is up-

dated.

Write-Through Cache - Upon a

cache hit, the cache and the main

memory are updated. Upon a cache

miss, only the main memory is up-

dated.

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