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G-3
M54E2 System Board Manual
Glossary
LBA - An acronym for Logical Block
Addressing. Any IDE hard drive that is
larger than 528MB.
Math Coprocessor - A microprocessor
designed specifically for performing
mathematical calculations. A math
coprocessor performs these calculations
faster than the CPU, and by doing so,
frees the CPU for other activities.
Megabyte (MB) - 1,024 Kilobytes or
1,048,576 bytes.
Mini AT - A standard system board size
measuring approximately 8.5" x 9.5".
Mode 1 - An IDE data transfer standard
that supports transfer rates of up to 5.22
Mbytes/sec.
Mode 2 - An IDE data transfer standard
that supports transfer rates of up to 8.33
Mbytes/sec.
Mode 3 - An IDE data transfer standard
that supports transfer rates of up to 11.1
Mbytes/sec.
Mode 4 - An IDE data transfer standard
that supports transfer rates of up to 15.5
Mbytes/sec.
Parallel - A form of data transmission in
which the data is sent one byte at a time
over several wires that each carry one
byte. In parallel transmission, all the
bytes arrive simultaneously, as opposed
to serial transmission in which bits arrive
one by one.
Parallel Port - A connection for a
printer or similar peripheral. Generally,
parallel ports are output only. See
Bidirectional Parallel Port and ECP.
PCI - An acronym for Peripheral
Component Interconnect. A high
performance 32-bit or 64-bit bus
developed by Intel Corporation. PCI is
designed to be independent of the
hardware architecture to ensure compat-
ibility with future computer systems.
See VESA, EISA, and ISA.
Pentium - A high performance 64-bit
CISC processor designed and manufac-
tured by Intel Corporation. As of this
writing, Pentium is the highest perform-
ing X86 processor available.
Plug and Play - A standard developed to
ensure easy installation of peripherals.
Theoretically, a newly installed card will
automatically configure itself and work
properly without requiring jumper
configuration or device drivers.
POST - An acronym for Power On Self
Test. A diagnostic program that is run
whenever the system is cold booted.
RAM - An acronym for Random Access
Memory. A type of memory that is used
as the “working memory” of a computer
system. See DRAM and SRAM.
ROM - An acronym for Read Only
Memory. A type of memory that retains
its data without requiring power. Once
written, it cannot be modified. See
EPROM and Flash ROM.
SCSI - An acronym for Small Computer
Systems Interface. An interface standard
used to interface hard disk drives,
removable cartridge drives, tape drives,
and CD-ROMs to the computer system.
SCSI allows multiple, high-performance
peripheral devices to be connected in a
chain. Each has its own address. Data
and control signals are sent along the
chain and only the specifically addressed
device responds.