Logic PCI to Dual Channel SCSI Host Adapter User's Guide LSI21003

LSI21003 PCI to Dual Channel SCSI Host Adapter A-1
3.75 pc 10.25 pc 11.25 pc 38.25 pc
4.333 pc
12 pc
12.938 pc
13.851 pc
48.583 pc
52.5 pc
34.5 pc
34.732 pc
Appendix A
Glossary of Terms and
Abbreviations
160/m An industry initiative extension of the Ultra160 SCSI specification that
requires support of Double Transition Clocking, Domain Validation, and
Cyclic Redundancy Check.
Active
Termination
The electrical connection required at each end of the SCSI bus,
composed of active voltage regulation and a set of termination resistors.
Ultra, Ultra2, and Ultra160 SCSI require active termination.
Address A specific location in memory, designated either numerically or by a
symbolic name.
AIP Asynchronous Information Protection provides error checking for
asynchronous, nondata phases of the SCSI bus.
Asynchronous
Data Transfer
One of the ways data is transferred over the SCSI bus. It is slower than
synchronous data transfer.
BIOS Basic Input/Output System. Software that provides basic read/write
capability. Usually kept as firmware (ROM based). The system BIOS on
the mainboard of a computer is used to boot and control the system. The
SCSI BIOS on the host adapter acts as an extension of the system BIOS.
Bit A binary digit. The smallest unit of information a computer uses. The
value of a bit (0 or 1) represents a two-way choice, such as on or off,
true or false, and so on.
Bus A collection of unbroken signal lines across which information is
transmitted from one part of a computer system to another. Connections
to the bus are made using taps on the lines.