HP 28642A manual Parallel port, Precision Bus See HP-PB

loopback hood

Aspecial connector with signal lines configured to allow loopback testing of the adapter card.

low-density connector

In reference to the SCSIbus, a Xl-conductor connector consisting of two rows of ribbon contacts spaced2.16 mm (O.OsSin) apart. Seealso, high-density connector.

parallel port

The Z-pin connector on the SCSI/parallel adapter card for S-bit parallel data communications with an output only device, such as a printer.

PA-RISC

Hewlett-Packard’s Precision Architecture Reduced Instruction Set Computing computer systems.

Amethod to check that data wasaccurately transmitted and received. Usually, the tranmission logic sumsthe transmitted data unit and, basedon the summation, appendsa parity bit. The receiver logic sums the received data unit and, based on its summation, compares the parity bit. The adapter card’s SCSIport can have its parity-checking ability enabled or disabled.

Precision Bus

See HP-PB.

SCSI

Small Computer SystemInterface, often pronounced “skuq”. Refers to both SCSI-1 and SCSI-2.

SCSI-1

Complies with the SCSI specification X3.131 - 1986.

4 Glossary