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AMM-1570/1572 User’s Guide
Stock Number: 510526-00, Rev. B Page: Glossary-5
Print Spec Number: 492379-00
Current Date: 3/7/94 ECN Date: 3/8/94
Glossary-5
Glossary
DMA
See Direct Memory Access
EEPROM
Electrically-Erasable Program-
mable Read Only Memory. An
integrated circuit used to store
the host adapter configuration.
The data stored in the EEPROM
can be updated while it is
installed on the host adapter.
EISA
Extended Industry Standard
Architecture. A kind of com-
puter bus. EISA, an extension of
the 16-bit ISA bus standard,
allows expansion devices like
network cards, video adapters,
and modems to transfer data
across the PC bus 32 bits at a
time. This standard was intro-
duced in 1988.
EPROM
Erasable Programmable Read
Only Memory. An integrated
circuit used to store the host
adapter BIOS and firmware.
EZ-Audio
See Adaptec EZ-Audio
EZ-SCSI
See Adaptec EZ-SCSI
FIFO
First In/First Out. A queuing
order in which items are
removed from the queue for exe-
cution in the same order in
which they are placed in the
queue. An integrated circuit that
buffers data in such a manner
that each byte placed in the
buffer is removed from the
buffer in the same order.
Firmware
The software that controls and
manages the host adapter. It is
firm as opposed to soft because it
is designed into the host adapter
and cannot be modified by the
user.
GByte
Gigabyte. A measure of com-
puter storage. One GByte equals
approximately one billion bytes.
(A byte is the amount of storage
needed to hold one character.)
Host
A microcomputer system in
which a host adapter is installed.
The host uses software to
request the services of the host
adapter in transferring informa-
tion to and from peripheral
devices attached to the SCSI host
adapter.
Host Adapter
A printed circuit board or inte-
grated circuit that installs in a
standard microcomputer sys-
tem and provides a SCSI bus
connection so that SCSI devices
can be connected to the
microcomputer.
IBM PC-AT Compatible
Any computer system that emu-
lates exactly the IBM
®
PC-AT
®
and that uses an ISA backplane
bus.
Industry Standard Architecture
See ISA