host adapter

Seeadapter.

HP-PB

Hewlett-Packard Precision Bus. The data, control, and addressingsignal lines for input/output operation on Hewlett-Packard PA-RISC computer systems. HP-PB is the 32-bit system-architectedbus through which the CPU, memory, and input/output adapter cards communicate.

HP-PB card

Seeadapter.

Interface card

Seeadapter.

UO

Input/Output. The computer subsystemthrough which data communicationswith external devicesis performed.

IODC

I/O Dependent Code. In PA-RISC computers,IODC is ROM-based firmware on an adapter card that is usedfor supplying card-dependent information to the host computer. Thii codemay contain test routines that check operation of the card.

LED

Light Emitting Diode, a semiconductor component that emits light when electrically activated to serveasan indicator of operation or state.

loopback

Generally, the processof transmitting known data, and comparing received data with expected results (normally used during troubleshooting, test,or verification procedures).

Glossary 3

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HP 28642A manual Host adapter Seeadapter, Hp-Pb