NEC 320Lb-R manual See backplane slot

EMS

(Expanded Memory Specification) A method of accessing memory beyond the 640K limit of DOS by exchanging data in and out of main memory at high speeds. Some software requires EMS to operate.

EPROM

(Erasable Programmable Read-Only Memory) A type of memory device that is usually used to store system BIOS code. This code can be erased with ultraviolet light, but is not lost when the computer is powered off. See also flash EPROM and ROM.

expansion slot

See backplane slot.

extended memory

The protected memory above 1M that is directly accessible by the microprocessor through certain utilities and operating systems.

F

fault tolerance

The capability of a system to respond smoothly to an unexpected hardware or software failure. There are many levels of fault tolerance, of which the lowest is having the ability to continue operation in the event of a power failure. Fault-tolerant computer systems mirror all operations, which means that every operation is performed on two or more duplicate systems at all times, so that if one fails another takes over.

flash EPROM

A type of memory device that is usually used to store system BIOS code. This code can be replaced with updated code from a floppy disk, but is not lost when the computer is powered off. See also EPROM and ROM.

floppy disk drive

See disk drive.

format

The process used to organize a hard or floppy disk into sectors so it can accept data. Formatting destroys all previous data on the disk.

FRB

(Fault Resilient Boot) Is a server management feature. FRB attempts to boot a system using the alternate processor or DIMM.

G

(Gigabyte)

1,073,741,824 bytes. See also byte.

4 Glossary