Wesper Western peripherals tc-151 User manual

(

western

peripherals

TM

Division

of

14321

New

Myford

Road • Tustin, California 92680 •

(714)

730-6250 • TWX: 910 595-1775 • Cable: WESPER

MODEL

TC-151

TAPE

CONTROLLER

HARDWARE

MANUAL

PUBLICATION

NUMBER

91000497

A

western

peripherals

14321

MYFORD

ROAD

TUSTIN)

CALIFORNIA

92680

by

Westem

Peripherals,

Inc.

All

Rights Reserved

PRINTED

IN

U.S.A.

AUGUST,

1981

PREFACE

This

manual

provides

information

necessary

for

the

installa-

tion

and

maintenance

of

the

Western

Peripherals

Model

TC-151

Tape

Controller

used

with

DEC

LSI-11

computers.

The

manual

is

divided

into

the

following

sections:

Section

I

Section

II

Section

III

Section

IV

Section

V

Section

VI

Section

VII

Section

VIII

Appendix

A

General

Description

Installation

Programming

Tape

Interface

Computer

Interface

Theory

of

Operation

Firmware

Maintenance

Signal

Glossary

ii

91000505

91000448

OTHER

PUBLICATIONS

Western

Peripherals

Model

TC-151

Tape

Controller

Logic

Manual

Western

Peripherals

DEC-Compatible

Diagnostic

Manual

iii

SECTION

I

GENERAL

DESCRIPTION

TABLE

OF

CONTENTS

PARA-

GRAPH

PAGE

1.1

DESCRIPTION

OF

EQUIPMENT

1-1

1.

3 DRIVE COMPATIBILITY

1-1

1.

6

OTHER

FEATURES

1-2

1.10

SPECIFICATIONS

1-3

•

~

SECTION I

GENERAL

DESCRIPTION

1.1

DESCRIPTION

OF

EQUIPMENT

1.2

The

Western

Peripherals

Model

TC-151

is

a

magnetic

tape

controller/formatter

which

is

hardware

and

software

compatible

with

the

DEC

LSI-11

family

of

computer

systems,

providing

both

NRZI

and

phase

encoded

(PE)

format

capability

on

an

embedded

controller.

Mounted

in

a

standard,

unmodified

Q-SPC

slot

in

a

standard

backplane

system

unit,

the

NRZI

version

of

the

con-

troller

consists

of

a

single

quad-wide

board

and

contains

a

microprocessor

plus

all

interface,

control

status,

and

format-

ting

electronics

to

emulate

the

TM-ll/TU-10

tape

subsystem.

Phase-encoded

format

capability

is

added

with

a

dual-wide

board

mounted

in

front

of

the

main

controller

board.

The

controller

installs

directly

into

available

locations

in

the

computer

or

expansion

chassis.

A

short

ribbon

cable

connects

the

two

boards

while

three

interface

ribbon

cables

connect

the

control-

ler

to

the

tape

drives.

Adapter

boards

provide

daisy-chaining

capabilities

for

multiple

drive

installations.

1.3

DRIVE COMPATIBILITY

1.4

The

controller

will

handle

up

to

eight

industry-compatible

(IBM/ANSI)

read-after-write

(dual

gap)

tape

drives.

The

control-

ler

is

capable

of

handling

tape

drives

in

varying

combinations

of

speeds,

densities,

and

formats.

The

controller

can

select

either

of

two

switch

selectable

speeds

from

25

to

125

inches

per

second.

91000497

8/Sl

1-1

GENERAL

DESCRIPTION

1.5

Single

or

dual

density

NRZI

and

PE

tape

drives

may

be

used

with

densities

of

800

bpi

NRZI

9-track,

and

1600

bpi

PE

9-

track.

Software

density

control

is

available

for

dual

density

operation.

The

controller

is

compatible

with

all

industry-

standard

tape

drives.

1.6

OTHER

FEATURES

1.7

The

Controller

is

compatible

with

the

Q-bus

and

existing

magnetic

tape

software,

utilizing

the

standard

TU-10/TM-ll

mag-

netic

tape

registers.

Data

transfers

are

in

a

16-bit

word

or

8-

bit

byte

format

via

the

Q-bus.

In

addition,

enhancements

of

the

standard

registers

provide

many

other

features

which

add

to

the

usefulness

of

the

controller.

1.8

Both

DEC

(normal)

and

standard

IBM

(selectable)

byte

packing

modes

are

available.

This

bit-selectable

IBM

packing

mode

allows

reading

and

writing

IBM/industry-compatible

tapes.

The

automatic

read

and

write

on-the-fly

feature

allows

non-stop

operation

when

doing

consecutive

read

or

write

operations.

The

controller

writes

and

recognizes

IBM/ANSI -

compatible

end-of-

file

tape

marks.

The

controller

provides

an

"EDIT"

feature

which

allows

a

record

anywhere

on

a

previously

recorded

tape

to

be

replaced

with

an

updated

record.

1.9

A

33-byte

data

buffer

provides

flexibility

in

assigning

priorities

when

programming

data

transfers

to

the

computer.

The

tape

motion

control,

Cyclic

Redundancy

Check

Character

(CRCC)

91000497

1-2

GENERAL

DESCRIPTION

and

the

Longitudinal

Redundancy

Check

Character

(LRCC)

generation

and

checking,

inter-record

gap

generation

and

status

reporting

are

included.

No

screwdriver

adjustments

are

required.

While

the

controller

can

read

or

write

only

in

the

forward

direction,

it

can

space

(or

move

to

a

new

position)

in

both

directions.

1.10

1.11

SPECIFICATIONS

The

following

information

summarizes

the

specifications

of

the

Tape

Controller:

1.

Computer

Interface

a.

Compatibility

-

The

controller

is

hardware

com-

patible

with

the

DEC

LSI-11

computer

systems,

emulating

the

TM-ll/TU-10

subsystem.

b.

Connects

to

the

Q-bus

through

slots.

c.

Bus

Loading

-

One

bus

load.

d.

Tape

Commands*:

Off

Line

Read

Write

EOF

Space

Forward

Space

Reverse

Write

with

Extended

Record

Gap

Rewind

standard

Q-SPC

91000497

8

/81

1-3

91000497

8/81

e.

Other

Mode

Controls:

Density

Selection

*

Byte

Mode

Selection

*

Controller

Clear

Unit

Selection

*

Interrupt

Enable

*

Command

Execution

(GO)

*

Edit

Mode *

For

Diagnostics:

GENERAL

DESCRIPTION

Check

Character

Read

Selection

*

Bad

Tape

Error

Simulation

*

f.

Controller

Status:

Status

of

the

above-mentioned

commands

marked

with

an

asterish

(*)

may

be

checked

in

addition

to

the

following:

Illegal

Command

End

of

File

Parity/Format

Error

Bus

Grant

Late

End

of

Tape

Record

Length

Excessive

(Read

Mode)

Bad

Tape

Error

Non-Existant

Memory

Drive

On-Line

Beginning

of

Tape

Write-Protected

1-4

91000497

Drive

Rewinding

Drive

Ready

Error

Summary

Controller

Ready

GENERAL

DESCRIPTION

Correctable

Parity

Error

(Read)

PE

Identification

For

Diagnostics:

Tape

Stopping

After

Rewind

10

KHz

Clock

Gap

Shutdown

Read/LRC

Bits

2.

Format

Compatibility

Fully

compatible

with

the

industry-standard

IBM/ANSI

digital

tape

recording

standard

as

described

in

ANSI

specifications

X3.22-1973

and

X3.39-1973.

Both

DEC

(normal)

and

standard

IBM

(selectable)

byte

packing

modes

are

available.

3.

Drive

Compatability

a.

Designed

to

be

compatible

with

the

industry

standard

drives

b.

Read-after-Write

only

(dua:

gap

head)

c.

Single

or

dual

density

(operator

or

software

switchable)

4.

Tape

Speed

25

ips,

37.5

ips,

45

ips,

75

ips,

125

ips

8/81

1-5

91000497

GENERAL

DESCRIPTION

5.

Format

and

Density

a.

NRZI

9-Track

-

800

BPI

b.

PE

9-Track

-

166

BPI

(with

TC-151P

Controller)

6.

Data

Transfers

a.

9-Track

(1)

DEC

-

compatible

byte

packing

mode,

(least

significant

byte

first)

-

standard

operating

mode

(2)

IBM

-

compatible

byte

packing

mode

(most

significant

byte

first).

b.

Bus

transfers

consist

of

16-bit

word

transfers

with

8-bit

byte

transfers

to

odd

bytes

at

the

beginning

and/or

end

of

the

transfer.

7.

Drive

Configuration

a.

Up

to

eight

drives

in

daisy

chain

configuration.

b.

One

or

two

tape

drive

speeds.

c.

Single

or

dual

densities

on

the

daisy-chain.

8.

Hardware

a.

One

quad-wide

printed

circuit

board

for

NRZI

format

capability

mounted

within

the

computer

chassis

(or

expansion

cabinet)

,

containing

a

2901

microprocessor

and

other

advanced

tech-

nology

microcircuits.

b.

For

phase-encoded

format

capability,

one

dual-

wide

board

mounts

in

front

of

the

main

control-

ler

board

and

interconnects

by

ribbon

cable.

8/.81

1-6

91000497

GENERAL

DESCRIPTION

c.

Three

interface

cables

and

adapter

boards

per

tape

drive

9.

Other

Features

a.

Edit

mode

for

correcting

pre-recorded

tapes

b.

Crystal

controlled

clocks

c.

Phase-locked

loop

tracking

in

PE

d.

No

screwdriver

adjustments

10.

Error

Handling

a.

Generates

and

checks

vertical

parity,

CRC, LRC,

preambles

and

postambles

b.

Detects

dead

track

errors

c.

Corrects

PE

single

channel

dropouts

11.

Data

Buffering

The

internal

buffer

between

the

CPU

and

the

tape

drive

provides

33

bytes

of

buffering

to

allow

for

trans-

fers

between

the

controller

and

the

tape

drive

during

the

time

that

the

CPU

bus

is

unable

to

ser-

vice

the

controller.

During

read

operations,

the

buffer

allows

a

check

of

false

preambles

in

9-

track

PE

mode

when

a

single

dead

track

occurs.

During

read

operations,

the

buffer

must

be

emptied

within

the

maximum

times

specified

below,

otherwise

a

data

late

error

condition

is

detected.

8/81

1-7

·•

91000497

GENERAL

DESCRIPTION

Maximum

Time

After

End

of

Record

Tape

Speed

9-Track

NRZI

9-Track

PE

25.0

ips

1.

50

ms

2.05

ips

37.5

ips

1.00

ms

1.37

ms

45.0

ips

0.83

ms

1.14

ms

75.0

ips

0.50

ms

0.68

ms

125.0

ips

0.30

ms

0.41

ms

12.

Non-Stop

"On-the-Fly"

Tape

Operation

This

feature

provides

continuous

tape

motion

when

consecutive

tape

commands

require

tape

motion

in

the

same

direction

on

the

same

tape

drive.

Under

these

conditions,

the

controller

will

time

through

the

inter-record

gap

(IRG)

in

the

read

mode,

or

will

write

the

IRG

in

the

write

mode

and

execute

the

without

stopping

the

tape.

13.

Power

Requirements

a.

Source

-

CPU

or

Expansion

Chassis

power

supply

b.

+

5VDC

+

5%

@

9.0

amps

14.

Physical

Specifications

a.

Size

-Two

Standard

DEC-sized

board

(1)

One

quad-wide

board

(2)

One

dual-wide

board

(for

PE

format)

b.

Weight

(1)

Controller

boards

22

oz.

(624

grams)

(2)

Cables

&

Adapters

26

oz.

(737

grams)

per

drive

8/81

1-8

c.

91000497

8/81

Environment

(1)

Operation

Temperature

(2)

Storage

Temperature

(3)

Relative

Humidity

1-9

GENERAL

DESCRIPTION

O

to

55

Degrees

C

10

to

70

degrees

C

10

to

90

percent

(without

conden-

sation)

SECTION

II

INSTALLATION

PARA-

GRAPH

2.1

INTRODUCTION

2.3

PREPARATION

TABLE

OF

CONTENTS

2.5

System

Components

2.6

SYSTEM

SET-UP

2.8

Tape

Speed

Selection

2.9

Controller

Board

Installation

2.10

Priority

Jumpers

2.11

Controller

Cable

Connections

2.13

TAPE

DRIVE

INSTALLATION

2.14

Adapter

Paddleboard

Setup

2.15

Terminators

2.16

Configuration

Switches

2.17

Drive

Select

Jumpers

2.18

Tape

Drive

Interconnections

PAGE

2-1

2-2

2-3

2-5

2-6

2-7

2-8

2-11

2.1

INTRODUCTION

SECTION

II

INSTALLATION

2.2

This

section

provides

the

necessary

information

to

success-

fully

set

up

and

install

the

TC-151

Tape

Controller

into

the

DEC

LSI-11

computer

system.

This

information

is

essential

for

the

initial

installation

and

will

also

be

valuable

when

the

controller

is

reinstalled

after

repair.

The

controller

consists

of

two

printed

circuit

boards

which-plug

into

the-slots

in

a

standard

Q;...;SPC-wired

system

unit

(backplane)

which

may

be

in

the

computer

mainframe

or

expansion

chassis.

Cable

Adapter

Paddleboards

are

provided

to

adapt

the

universal

controller

interface

cables

to

the

specific

connector

requirements

of

each

drive

(to

be

specified

by

the

cus-

tomer

at

the

time

of

purchase).

All

DC

power

required

for

the

operation

of

the

controller

is

received

from

the

power

supply

of

the

host

computer

or

chassis

via

the

backplane.

2.3

PREPARATION

2.4

Locate

the

position

in

the

computer

where

the

controller

will

be

installed.

Remember

that

the

position

of

the

system

unit

determines

priority

for

DMA

and

interrupt

activity.

The

tape

controller

usually

works

well

if

placed

anywhere

in

the

system.

Check

the

cabling

distance

to

the

first

drive

and

to

each

daisy-chained

drive,

verifying

that

all

cable

lengths

will

be

adequate.

Refer

to

the

tape

drive

manual

to

install

the

91000497

8/81

2-1

INSTALLATION

tape

drives.

The

computer

and

the

tape

drives

must

be

prepared

for

operation

before

the

controller

can

be

expected

to

operate

properly.

WARNING:

INCORRECT INSTALLATION WILL

CAUSE

DAMAGE

TO

THE

SYSTEM

WHEN

POWER

IS

APPLIED

2.5

SYSTEM

COMPONENTS.

Do

not

discard

any

shipping

materials

until

all

parts

have

been

checked

off

on

the

packing

list

and

any

concealed

damage

has

been

reported

to

the

carrier.

Check

the

equipment

supplied

to

ensure

that

all

necessary

items

are

included:

1.

Controller

Boards

(two)

with

interface

cable

2.

Optional

Standard-type

backplane

system

unit

and

asso-

ciated

power

cable.

supply

connector.)

(Molex

plug

must

match

the

power

3.

Drive

Cables

(3),

one

set

per

drive:

Control

cable

Write

cable

Read

cable

4.

Adapter

Paddleboards

(3),

one

set

per

drive:

Control

Paddleboard

Write

Paddleboard

Read

Paddleboard

Including:

Terminators

(on

the

Write

and

Control

Paddleboards)

Drive

Select

Jumpers

(on

the

Control

Paddleboard)

See

Figure

2-6

for

part

identification.

91000497

8/81

2-2

INSTALLATION

5.

Program

tapes:

a.

Diagnostic

program

tape

b.

Reliability

program

tape

6.

Documentation:

a.

Hardware

manual

b.

Logic

manual

c.

Diagnostic

manual

7.

Other

items

which

must

be

available:

a.

Tape

drives

b.

Computer

c.

Standard

Q-SPC

backplane

system

unit

and

asso-

ciated

power

cable.

(molex

plug

must

match

the

·

power

supply

connector.)

d.

Q-bus

terminator,

cables/jumpers

e.

Loading

device

for

diagnostics

2.6

SYSTEM

SET-UP

2.7

The

tape

system

must

be

set

up

properly

either

when

instal-

ling

the

system

or

after

servicing.

Proper

set-up

includes:

Setting

the

speed

switches

for

the

speed

of

the

drives

and

check-

ing

backplane

priority

signals.

Each

Tape

Drive

Adapter

Paddle-

board

must

have

the

proper

termination

(on

the

last

drive)

and

the

Configuration

Switch

setup.

Installation

is

complete

when

the

system

components

are

plugged

in

and

interconnected.

A

re-

check

and

inspection

of

the

installation

ensures

that

no

item

is

overlooked.

The

procedures

for

setup

and

installation

are

in

the

paragraphs

that

follow.

Locations

of

installation

features

on

the

controller

boards

are

shown

in

Figure

2-1.

91000497

8/81

2-3

Wesper western peripherals TC-151 User manual

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