Olivetti DE 520 Series Bedienungsanleitung

520

SYSTEM

and

Magnetic

Tapes

9 -M t

fs^

l ^

i p

J s ^ «

i'-'

The

Centre

for

Computing

History

www.ConiputingHistofy.org.uk

^n\^7i I ?

I*''

f.\

'•'i

: -,r_

•:„

•-

THE

520

SYSTEM

AND

MAGNETIC

TAPES

Produced

Software

British

Olivetti

Limited

Berkeley

Square

London

W1X

6AH

PREFACE

; _ ;}

This

manual

explains

the

functions

of the

two

magnetic

tape

options

on the

520

System:

1Magnetic Tape Cassette Option

2 Computer Compatible Tape Option

The

manual

split

into

two

sections.

The

first

section,

Cassettes

System,

details

the

operations

that

can

apply

both

cassette

and

computer

tape

options.

The

second

section,

Computer

Magnetic

Tape,

details the

differences

operation

for

computer

compatible

tape

applications.

CONTENTS

Page

Preface

Contents

Introduction 2

THE DE 523 AND

CASSETTES

SYSTEM 4

Cassette

Handling 4

Size of

Cassette

Tape

Record Handling Techniques 4

Read

Read Errors (Parity) 5

F?ead

Errors

(Overflow)

Equipment

Errors

Backspace 5

Write 5

Write Errors (Parity) 5

Write Errors (Equipment) 5

Write File 6

Rewind 6

TERMINAL OPERATION 7

Selecting and Processing 7

Manual Control 7

OPERATIONAL MODES USING CASSETTES 8

Free-Form Mode 8

Enter Mode 9

Verify

Mode

Under

Batch

Mode

"JO

Error

Messages

THE DE 523 AND COMPUTER MAGNETIC TAPE 14

Introduction "'4

TAPE OPERATIONS 15

Read

"IS

Backspace 15

Write "'S

Write File 15

Rewind 15

Insert 15

TERMINAL

OPERATION 16

Selection and Processing 16

Operational

Modes

using

the

Computer

Tape 16

Free-Form Mode 16

Enter Mode 16

Verify

Mode

Batch Mode ''7

Tape Errors 17

Appendix

Tape

Error

Messages

International:

ASCII-BCD

Conversion

Table

International:

ASCII-EBCDIC

Conversion

Table

DTypical Computer Tape Format on

the

DE 520 System

Figures 1 Beginning-of-Tape &

End-of-Tape

Areas 12

2 Nominal Record (Cassettes) 12

3 Recording Bit Pattern 13

INTRODUCTION

The

central

unit of

the

Olivetti DE 520

System

equipped

with

cassette

recorders.

The

standard

DE 521

has

one

cassette

recorder,

the

523

has

two.

The

DE 521

has

the

option of a

second

cassette.

Cassette

recorders

can

assigned

for

either

Input or

Output

operations.

There

are

two

recording

tracks

the

cassette

magnetic

tape,

one

track

for

data

and

the

other

for a bit parity

check.

Two

possible

inter-record

gap

sizes

are

available: 0.75 inch

and

1.5 inch (CRR-IB compatible). The 0.75 inch ihter-record

gap

standard

the

520

System,

the

1.5 inch

inter-record

gap

optional.

Data

recorded

using

the

extended

ISO/USASCII

Code

(7+ 1+ 1 bits).

The recording density is 800 bpi

(80

characters). Read/Write speed is 12.5'ips, with a

rewind

speed

120

ips.

Each

cassette

tape

is 280 feet (90 metres) in length;

the

effective

capacity

being 1,000-

2,000 records depending on record size, 216-80 characters respectively and the size of

inter-record

gaps.

CRT.

BRILLIANCE

CONTROL

lii-

^:•--;

ji j

. i,h

IIIIIHIIIll

,-. 'U

'it

•

.:il=

A,Y^%^V*rV'¥'iV\'

'I'M'

4 f ? ? f f.

?.Xj'.

j,,j

ii,/f

•TONE

CONTROL

ON/OFF

SWITCH

RESET

BUTTON

THE

523

AND

CASSETTES

SYSTEM

CASSETTE

HANDLING

It should be noted

that

the

correct

handling of

cassettes

is of prime importance.

insert

the

cassette

into

its

compartment:

1. Open the compartment door by pressing the catch downwards.

2. Insert the cassette into the compartment by holding the top and bottom of the

»cassette between the index finger and thumb (see photograph opposite). Special

care

should

taken

not to

handle

the

exposed

part of

the

magnetic

tape.

3. Slot the cassette into the compartment by inserting the right edge slightly ahead

the

left

edge

(see

photograph

opposite).

the

compartment

door.

remove

the

cassette

from

its

compartment:

Open

the compartment door

pressing the catch

downwards.

Hold

the top and

bottom

of the cassette and

move

it slightly to the right before

removal. The left

edge

of the

cassette

should be withdrawn first.

NOTE:

ALL

TIMES THE CASSETTES MUST BE

REWOUND

PRIOR TO THEIR

REMOVAL.

SIZE

CASSETTE

TAPE

The cassette tape is

280

feet

(90

metres)

long

with

the effective capacity of each

cassette consisting of 1.000-2.000 records depending on record size,

216-80

characters

respectively,

and

the

size of inter-record

gaps.

RECORD

HANDLING

TECHNIQUES

The

cassette

recorder

feature

provides

the

terminal

with

the

ability

read,

write,

I ^

backspace,

insert,

write

file

marks,

and

rewind

cassette

tapes.

The

operations,

themselves,

can

performed

under

the

control

format

programs

provided

with

the

cassette

system.

Sincc

the

recorders

the

same

interface,

not

possible

overlap

operations

the

first

recorder

with

those

the

second

recorder.

is,

however,

possible

overlap

cassette

input/output

operations

with

other

peripheral

operations,

providing

the

terminal's

overlap

rules

are

satisfied

(see

520

General

Manual,

pSiQQ

14).

READ

The Read operation reads the next available record

from

the selected cassette into the

buffer specified by the terminal control.

the "Clear Leader" is detected prior to the

initiationof the read operation the cassette recorder assumes that it is at the beginning-

of-tape

(BOT),

and advances the tape

beyond

the Clear

Leader.

Clear Leader is

detected during a read operation the cassette recorder assumes it is at the end-of-tape

(EOT),

the tape is retarded

0.25

inches

from

the Clear Leader and the read operation

terrninales

with

the

message

EOT

displayed

the

screen.

READ

ERRORS

(PARITY)

When a parity error

has

occurred

there

are

three

further attempts to read the record from

the

cassette,

this

achieved

backspacing

over

the

error

record

and

re-reading

it. If

the

fourth attempt to read

the

record is

unsuccessful

the

first

character

the

record

replaced

the

character

and

the

read

error

message

appears

the

screen.

SHOULD

BE NOTED THAT

THE

DATA FROM

THE

ERROR

RECORD

STORED

THE

SPECIFIED

INPUT

BUFFER.

READ

ERRORS

(OVERFLOW)

When a

record

containing

than

216

characters

is read, all

the

data

after

the

216th

character

is "lost". Parity is

checked

the

entire record

and

there

is no

screen

message

for overflow

conditions.

EQUIPMENT

ERRORS

If at any time during aread operation

the

cassette

recorder

is found to be non-

operational,

the

operation is terminated

and

an error

message

displayed on

the

screen.

(See

Cassette

Recorder Messages,

page

11, for appropriate action).

BACKSPACE

The

backspace

operation moves the

selected

cassette

tape

back

one

record. Ifthe Clear

Leader

detected

the

operation

terminated

without an

error

indication. If

the

cassette

recorder is non-operational the operation is terminated without an error indication.

WRITE

The Write operation

transfers

the

data

the

specified

buffe*

onto

the

selected

cassette

tape. The DE

backspaces

the record, and reads it at reduced sensitivity to check the

parity of the record. Ifthe Clear Leader is detected prior to the Write operation the DE

assumes

that

it is at

the

beginning-of-tape

(BOT)

and

the

tape

erased

until it is 3.5

inches beyond the Clear Leader. When the Clear Leader is detected during a Write

operation

the

DEassumes that it is at the end-of-tape

(EOT);

the

cassette

is backspaced

0.25

inch

from

the

Clear

Leader

and

the

operation

terminated

with

the

EOT

message

displayed

the

screesi.

WRITE

ERRORS

(PARITY)

When a parity error is detected the record is backspaced and 3.5 inches of tape erased,

the DE then performs the Write operation. This

process

is repeated until the Write

operation

completed

successfully.

WRITE

ERRORS

(EQUIPMENT)

the

cassette

is pi'otected from Write operations, by

the

physical removal of

the

plastic

insert

the

edge

of a

cassette,

the

Write

cporatior.

not

performed

and

error

message

displayed on

the

screen.

(See

Cassette

Recorder

Messages,

page

11, for

appropriate

action).

WRITE

FILE

The

Write

File

operation

writes

end-of-file

mark

consisting of

3.5

inches of tape

erased

followed

a singlecharacter

record

containing the

character.The

record

written without an LRC.

The

rules

governing

Clear

Leader,

protected

cassettes,

non-

operational recorders and

parity

error are identical to the Read operation.

REWIND

The

Rewind

operation

rewinds

the selected cassette tape

until

the beginning-of-tape

(BOT)

Clear

Leader

is sensed.

thetape is

positioned

on a

Clear

Leader

at the

time

the

operation

initiated

the

Rewind

function

not

performed.

not

possible

rewind

cassette positioned at

EOT

and on the Clear

Leader.

This

operation is

similar

to the

Read and

Write

operations in that it

follows

the convention of backspacing away

from

EOT

thus

making

the

rewind operation possible.

Dieses Handbuch passt für folgende Modelle

Inhaltsverzeichnis

Beliebte Lagerung Handbücher anderer Marken

QNAP

QNAP TS 32PXU Series Bedienungsanleitung

LaCie

LaCie RUGGED RAID Bedienungsanleitung

Freecom

Freecom CLS DOCK Bedienungsanleitung

PNY

PNY Attache P-FD64MBATT3 Bedienungsanleitung

HP StorageWorks MSL2024 Bedienungsanleitung

OLT

OLT 6x6 Maximizer Bedienungsanleitung

Transcend

Transcend JetFlash 160 Bedienungsanleitung

LaCie

LaCie RUGGED MINI Bedienungsanleitung

Thunderbolt

Thunderbolt 600 Bedienungsanleitung

Panasonic

Panasonic LB-DH8 series Handbuch

Intel

Intel RAID High Availability Bedienungsanleitung

LaCie

LaCie 12big Thunderbolt 3 Bedienungsanleitung

Spectra Logic

Spectra Logic T-Series Spectra T50e Bedienungsanleitung

Panasonic

Panasonic LKM-F931-1 Bedienungsanleitung

Tabernus

Tabernus Enterprise Erase E2400 Bedienungsanleitung

Rocstor

Rocstor COMMANDER 3F series Bedienungsanleitung

HP P9000 Bedienungsanleitung

Western Digital

Western Digital Ultrastar Data60 Bedienungsanleitung