LSI SYM8953U Configuration, DMA Bus, Master, Device Driver, Differential Scsi, Dword, Fast-20

Configuration	Refers to the way a computer is set up; the combined hardware
	components (computer, monitor, keyboard, and peripheral devices) that
	make up a computer system; or the software settings that allow the
	hardware components to communicate with each other.
CPU	Central Processing Unit. The “brain” of the computer that performs the
	actual computations. The term Microprocessor Unit (MPU) is also used.
DMA Bus	A feature that allows a peripheral to control the flow of data to and from
Master	system memory by blocks, as opposed to PIO (Programmed I/O) where
	the processor is in control and the flow is by byte.
Device Driver	A program that allows a microprocessor (through the operating system)
	to direct the operation of a peripheral device.
Differential SCSI	A hardware configuration for connecting SCSI devices. It uses a pair of
	lines for each signal transfer (as opposed to Single-Ended SCSI which
	references each SCSI signal to a common ground).
Dword	A double word is a group of four consecutive bytes or characters that are
	stored, addressed, transmitted, and operated on as a unit. The lower two
	address bits of the least significant byte must equal zero in order to be
	dword aligned.
EEPROM	Electronically Erasable Programmable Read Only Memory. A memory
	chip typically used to store configuration information. See NVRAM.
EISA	Extended Industry Standard Architecture. An extension of the 16-bit ISA
	bus standard. It allows devices to perform 32-bit data transfers.
External SCSI	A SCSI device installed outside the computer cabinet. These devices are
Device	connected in a continuous chain using specific types of shielded cables.
Fast-20	The SCSI Trade Association (STA) supports the use of “Ultra SCSI” over
	the term “Fast-20”. Please See Ultra SCSI.
Fast-40	The SCSI Trade Association (STA) supports the use of “Ultra2 SCSI”
	over the term “Fast-40”. Please see Ultra2 SCSI.
Fast SCSI	A standard for SCSI data transfers. It allows a transfer rate of up to 10
	Mbytes/s over an 8-bit SCSI bus and up to 20 Mbytes/s over a 16-bit
	SCSI bus.
FCC	Federal Communications Commission.

B-2 Glossary of Terms and Abbreviations