LSI 20160 User Manual
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Glossary of Terms and Abbreviations
Copyright © 2001 by LSI Logic Corporation. All rights reserved.
RAM
Random Access Memory. The computer’s primary working memory in
which program instructions and data are stored and are accessible to the
CPU. Information can be written to and read from RAM. The contents of
RAM are lost when the computer is turned off.
RISC Core
LSI Logic SCSI chips contain a RISC (Reduced Instruction Set
Computer) processor, programmed through SCRIPTS microcode.
ROM
Read Only Memory. Memory from which information can be read but not
changed. The contents of ROM are not erased when the computer is
turned off.
SCAM
SCSI Configured AutoMatically. A method to automatically allocate SCSI
IDs using software when SCAM compliant SCSI devices are attached.
SCSI
Small Computer System Interface. A specification for a high-performance
peripheral bus and command set. The original standard is referred to as
SCSI-1.
SCSI-2
The SCSI specification which adds features to the original SCSI
standard.
SCSI-3
The SCSI specification which adds features to the SCSI-2 standard.
SCSI Bus
A host adapter and one or more SCSI peripherals connected by cables
in a linear chain configuration. The host adapter may exist anywhere on
the chain, allowing connection of both internal and external SCSI
devices. A system may have more than one SCSI bus by using multiple
host adapters.
SCSI Device
Any device that conforms to the SCSI standard and is attached to the
SCSI bus by a SCSI cable. This includes SCSI host adapters and SCSI
peripherals.
SCSI ID
A way to uniquely identify each SCSI device on the SCSI bus. Each
SCSI bus has eight available SCSI IDs numbered 0 through 7 (or 0
through 15 for Wide SCSI). The host adapter usually gets the highest ID
(7 or 15) giving it priority to control the bus.
SCSI SCRIPTS
A SCSI programming language that works with the SCRIPTS processor.
The SCRIPTS processor fetches SCRIPTS instructions from system
memory to control processor operation.