HP 98625A User manual

HP Computer Systems

98625A

Disc Interface Installation

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HEWLETT

PACKARD

Computer Systems

98625A

Disc Interface Installation

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HEWLETT

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PACKARD

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HEWLETT

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PACKARD

Warranty Statement

Hewlett-Packard products are warranted against defects

materials and workmanship.

For

Hewlett-Packard Desktop

Computer Division products sold

the U.S.A. and Canada,

this warranty applies for ninety (90) days from the date of

delivery.* Hewlett-Packard will,

its option, repair or replace

equipment which proves

be defective during the warranty

period. This warranty includes labor, parts, and surface

travel costs, if any. Equipment returned

Hewlett-Packard

for

repair

must

shipped

freight

prepaid.

Repairs

necessitated by misuse of the equipment, or by hardware,

software, or interfacing not provided by Hewlett-Packard are

not covered by this warranty.

warrants that its software and firmware deSignated by

for use with a

CPU

will execute its programming instructions

when properly installed

that

CPU.

does not warrant

that the operation of the

CPU,

software, or firmware will be

uninterrupted or error free.

NO OTHER WARRANTY

EXPRESSED

IMPLIED,

INCLUDING,

BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES

MERCHANTIBILITY AND

FITNESS

FOR

A PARTICULAR

PURPOSE.

HEWLETI-PACKARD SHALL

NOT

LIABLE

FOR

CONSEQUENTIAL DAMAGES.

*For other countries, contact your local Sales and Service

Office to determine warranty terms.

98625A

Disc

Interface Installation

Part No. 98625-90000

,~:

This

document

refers to

proprietary

computer

software

which is protected by

except

for archival

purposes

prohibited

without

the prior written consent of

Hewlett-Packard Company.

Hewlett-Packard

Roseville Networks Division

8000 Foothills Boulevard

Roseville, California 95678

Printing History

New editions of this manual

will

incorporate

all

material updated since the previous edition.

Update packages may be issued between editions and contain replacement

and

additional

pages to

merged into the manual by the user. Each updated page

will

be indicated by a

revision date at the bottom of the page. A vertical bar

the margin indicates the changes on

each page. Note that pages which are rearranged due to changes on a previous page are not

considered revised.

The manual printing date

and

part number indicate

its

current edition. The printing date

changes when a new edition

printed. (Minor corrections

and

updates which are incorporated

at reprint

not cause the date to change.) The manual part number changes when extensive

technical changes are incorporated.

June

1982

...

First Edition

September

1983

...

Update 1

September

1983

...

Reprint (incorporating Update

Table

Contents

Chapter

Interface Installation

and

Configuration

Introdluction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts :Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HandHng the Interface

Card.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing Interface Cards in the I/O Backplane

....................................

Configuring

the

Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conn1ecting the Interface to Disc Drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interface Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Physical Arrangement of Equipment

......

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Li:mitations

..............................................................

Chapter

2: Service Information

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List

and

Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

Tables

98625A

Disc Interface Configuration Switches. . . . . . . . . . . . . . . . . . . . . . . . .

Recommended

Arrangement of

Computer

and

Disc Drives. . . . . . . . . . . . . . . . . .

Disc Interface Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts

Supplied.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Default Configuration Settings

............................................

Interface Select

Code

Switch Settings

......................................

Binary/Decimal Table of Hardware Interrupt Levels

..........................

Available HP-IB Interface Cables

.........................................

Disc Interface Cable Length Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replaceable Parts List

.................................................

iii

Chapter 1

Interface Installation and Configuration

Introduction

The

98625A Disc Interface

used

conjunction with an

98620

DMA

card to connect

your

9826

9836

computer to

one

more mass storage disc drives.

The

interface

compatible with all Hewlett-Packard CS/80 disc drives including the following

7900

Series!

units:

•

7908

•

7911

•

7912

To minirnize potential difficulties,

don't

forget that:

•

The

interface contains a high-speed HP-IB controller,

and

designed specifically for disc

appllications. Because of its high data rates

and

fast signal transition times, the interface

not

suitable for use with

other

HP-IB peripherals.

• High-speed data transfers

demand

direct memory access capability; therefore, the inter-

face

cannot

used without a

DMA

card installed

the computer.

• The

10833

HP-IB chaining cables used with this interface are designed for high-

frequency applications. To ensure reliable operation,

not use any

other

cable type.

Note

The

98625

Disc Interface requires

98620

DMA

card for

operation. It

cannot

used without

DMA

capability installed in the

computer. Use only 256K-byte memory boards in combination with

the

disc interface

and

DMA

card.

This manual explains the installation procedure for the disc interface. Additional technical

information

included for use by service personnel.

new disc drives

become

available through new product development, the models supported by this interface may increase. Consult with

your

Sales

and

Service office

you

need

assistance

selecting disc drives for use with this interface.

2 Interface Installation

and

Configuration

Parts Supplied

The following items are supplied with the

98625A Disc Interface:

Item

Interface Card

Installation Manual

Select

Code

Label

Part

Number

98625-66501

98625-90000

7120-1957

Handling the

Interface

Card

The interface card contains components that are easily damaged by static electrical discharge

caused by improper handling. To minimize the risk of component damage, the interface

shipped

a special conductive plastic bag for protection. Do not remove the interface from the

bag until

installed. When installing the interface,

sure there

no opportunity to

create a static discharge. Hold the interface by the thumbscrews

and

backplane cover while

removing

from the bag,

and

avoid touching the circuitry

the card. Touch the metal surface

the computer rear cover panel with

one

hand

and

maintain that contact while plugging the

interface into the computer with the other hand. After the interface

seated into the backplane

connector, the risk of damage

negligible. Whenever you

need

to remove the card from the

computer for service or system changes, keep the card

its protective bag to prevent compo-

nent damage,

place the interface on a work surface designed for servicing static-sensitive

electronic components

and

assemblies.

Be careful to avoid touching the printed circuit edge connector fingers

the interface. Finger-

prints promote contamination that can lead to unreliable operation. If

becomes necessary to

clean the fingers, use a cotton swab

and

isopropyl alcohol. Be sure to avoid the possibility of

electrostatic discharges while cleaning the connector fingers; both for safety,

and

to prevent

component

damage.

Interface Installation

and

Configuration 3

Installing Interface Cards in

the

1/0 Backplane

The

9826/9836

computer has eight backplane slots that can be used for interface cards,

memory boards,

and

other devices. However, only four slots can be used for interfacing to

external peripherals. The peripheral interface slots are located slightly below the threaded

fasteners that hold the interface retainer screws when the card

inserted. If you insert the

interface into the wrong slot, the thumbscrews

the interface cover cannot mate properly with

the threaded fasteners

the rear panel.

successive interfaces are installed, the remaining

slots that are available for memory or other devices are reduced by

one

for each interface

inserted.

To install the interface card, follow these steps:

Set

the configuration switches on the interface as instructed in the Configuring the Inter-

facE~

section later in this chapter.

Be sure that the computer power switch

OFF.

3. Remove

one

or more backplane covers to locate an empty

110

slot.

none

available,

rearrange the memory boards as necessary. Memory boards can be installed in any slot

the backplane. Be sure

all

boards are firmly seated

their respective backplane connec-

tors before replacing the covers.

slots are available, you must remove a memory board or other

110

card to free

the necessary backplane space.

you remove a

RAM

memory board,

must be the

lowest address board

the backplane. Refer to the Operating Manual for your computer

for information on how to identify the lowest-address memory card.

4. Slide the interface card into any available slot, component side

UP.

Seat

the card firmly

into its backplane connecter, then tighten the thumbscrews until they are finger tight. Be

sun~

DMA

card has

been

installed in the computer.

5. Replace any remaining covers that were previously removed, then use

appropriate

cable to connect the interface to the first disc drive. Use HP 10833 cables to connect to

othler drives as explained later in this chapter.

Turn the computer

and

peripheral(s)

and

operate as explained in the applicable

ope:rating manuals.

you encounter difficulty, contact your nearest

Sales

and

Service

office.

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