Cipher_Tape Cipher Tape

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. STREAMING TAPE

TRANSPORT

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Tope

Speed

Low-Speed

Variations

(LSV)

Ins1an1oneous

Speed

Variation

(lSV)

Write

Skew

Rew

i

rd

Speed

Nominal

Access

Time

(ms)

Read

Write

Nominal

Reposiiion

Time

(ms)

Redd

Write

Nominal

Reins1ruct

Time

(ms)

Read

Write

Character

Rate

(Hz)

..

1600

bpi

3200

bpi

Data

Density

Tape

(Comp.J1er

grade)

Width

Thickness

Reel

Size

Tape

Tension

Net

V:eight

Shipping VJeight

100

ips,

SO

ips

(3200

bpi

only), 25

ips

%1%

of

nominal

:4%

of

long-1erm

speed

300

microinches,

maximum

.

175

ips,

overage

(10

112

-inch

reel)

25 ips

40

120

15

12

40,000

N/A

100

ips

260

780

4

3

160,000

N/A

1600

bpi

(pE)

or

3200 bpi

ANSI

X3.40-1976

0.5

inch

105

mil

10

'/2.

inches

max.

7

inches

min.

7

oz.,

nomi

nat

80 pounds (36.0

kg)

98

pounds

(44.5

kg)

SO

ips

120

350

8

6

N/A

160,000

Table

I-I.

fl~echGn

icaJ

and

Electrical

S;>ecifications

Dimensions

Height

Width

Depth

(from

mounting

surface)

Mount ing

(standard

19-inch

RETMA

rack;

slide

mounting

provided)

Power

Data

Reliability:

Write

(certified

tape)

Read

Recoverable

Read

Perrnment

Operating

Temperature

Relative

Humidity

Altitude

Interface

Impedance,

Sink

Current

Logic

Low

Logic Hig,

Rise/Fall

Time

Daisy-Chain

Capabilities

Cable

Characteristics

MTBF

MTTR

8.75 inches (22.2

cm)

17.0

inches

(43.2

em)

22.0 inches (55.9

cm)

EIA

Specifications

100, 120, 220, 240

Vae

(+10%, -15%); 230

Vac

(:!:IO%) 48 -

61

Hz;

270

watts,

max.

1

error

in

10

8

bytes

I

error

in

10

9

bytes

I

error

in

10

bytes

13-40

degrees

Centigrade

20-85% noncondensing

7,500

feet

(10,000

feet

optional)

130

ohms

at

3 Vdc

25

rna,

max.

0.4 Vde,

max.

2.4 V

dc,

min.

100

nanoseconds,

max.

Eight

dual-speed

tape

drives

or

four

dual-

speed

tope

drives

plus

one

formatted

drive,

25

feef

maximum

10tal

if

active

repeaters

nof

used.

28

AWG

fiat

ribbon,

22

or

24

AWG

twisted

pair.

5500 hours

30

minutes

(to

isolate

and

replace

major

subassemblies)

Table

I-I.

fliechanicaJ

and

Electrical

Specifications

(Continued)

4-5

INTRODUCTION

TO

STREAMING

TAPE

OPERATION

Streaming

tape

operation

is simply writing

data

to

tape

without stopping and

starting

between

each

record block.

Interblock

gaps, as required in

the

ANSI

format,

are

inserted

automatically

"on

the

fly". This

concept,

although

not

new, was focused on in

IBM's

Model 8809 in

late

1978. All

tape

drives

currently

being

manufactured

have

the

capability

of

streaming.

So what is

so

special

about

the

Cipher

Model F880

Microstreamer?

It

is

manufactured

specifically

for

streaming

tape

operation

under a design

concept

in which a

severe

design

constraint,

that

of

start/stop

time,

has been

greatly

relaxed.

As shown in Figure 5, a

typical

125 ips, vacuum column

tape

drive is

capable

of

starting

and stopping in 3.5

milliseconds, within

the

G.6-inch

inter-record

gap, while

the

Microstreamer

takes

up

to

24-0

milliseconds

to

ramp

up

to

a

speed

of

100

ips. •

Obviously,

the

streaming

tape

drive

does not

generate

standard

interblock

gaps in

the

usual

manner,

with

its

24-0-millisecond ramp-up

time

(at

100 ips). The

manner

in which

the

Microstreamer

generates

the

standard

interblock

gap

is

explained on page 8 in

the

Repositioning

section.

The

relaxation

of

the

previously

vital

tape-access

time

constraint

has

made

possible

numerous design changes:

125

IPS

o

Capstan

servo

is no longer required.

o

Reel

servos

are

simpIlfied.

o Lower power and less expensive motors

are

required.

o Tape

is

loaded and unloaded

automatically.

o Less expensive

tape

buffering

is

required.

3.5

MS

START/STOP

Figure 5. Tape Access Time

6

240

MS

STREAMING

DRIVE

100

IPS

Figure

1.

Tape

P:Jth

TAPE

CLEANER

@TAPE

ROLLER

GUIDE

(3)

o

COMPLIANCE

ARM

ROLLER

GUIDE

LJ-5

I

BACKUP

TIME

FOR

VARIOUS DISK

CAPACITIES

The

total

time

rectuired

for

the

aperator

to

complete

the

task

of

backup

for

a

given

disk

capacity

is

given

in

Tables

8

and

9.

These

calculations

are

based

on

a

write

speed

of

100

ips

and

a

rewind

speed

of

200

ips.

Additionally,

1

minute

is

added

for

each

tape

load

function.

-

r-

'"

DISK SIZE I

BLOCK

SIZE

IN BYTES

MBYTES

8192

4096

2048

/ 1024

512

·256

20

3.9

4.4-

5.3

,

7.4

10.7 18.0

.

40

8.0

9.0

10.7

13.9

21.3

36.0

60 12.3 13.1

16.4

21.3

31

..

9 54,,1

80

·15.6

18.0

21.3

28.7

4-3

..

5

72.2

100 19.7 22.1

27.1

36.0

54.1 89.4-

160

32.0

35.3

4-2~6

56

..

6 86.1 14-4.3

200

4-0.2

44.3

53.3

71.3

108.2

179.5

Table

8.

Time

in

Minutes

for

Various

Capacity

and

Block

Size

at

1600 bpi

DISK SIZE

BLOCK

SIZE

IN

BYTES

MBYTES

8192

4096 2048 1024

512

256

20 2

..

5

2.5

3.3

4.9

9.0

16.6

40

4.1

4.9

7.4

10.7

17.2

31.2

60

6.6

8

..

2

10.7

15.6

25.4

46.7

80

8.2

10.7

13.9

20.5

34.4

62.3

100 11.5 13.3

18.0

26.2

43.5

77.9

160

18,,0

2L3

28,,7

4L8

69,,7

124.6

200

22.1

26.2

35.2

53.3

86.1

155.8

Tabie

9.

Time

in

Minutes

for

Various

Capacity

and

Siock

Size

at

3200

bpi

54

y-~

"'~bles

1 0 and

11

show

the

number of 1

0.5-inch

reels

of

1.5-mil.

(standard

2400-foot)

tape

!:cquired

to

back

up a

specific

disk

size.

The

figures

shown include

all

formatting

characters

and

record

gaps.

DISK SIZE BLOCK SIZE

IN

BYTES

MBYTES 8192 4096 2048 1024 512 256

20 0.48 0.54 0.65 0.9 1.3

2~2

40 0.97 1.1 1.30 1.7 2.6 4.4

60 1.50 1.6 2.00 2.6 3.9 6.6

80 1.90 2.2 2.60 3.5 5.3 8.8

100 2.40 2.7 3.30 4.4 6.6 10.9

160 3.90 4.3 5

..

20 6.9 10

..

5 17.6

200 4.90 5.4 6.50 8.7 13.2 21.9

Table

10. Number

of

Reels

of

Tape

for

Various

Capacity

and Block Size

at

1600 bpi

(2400'

Reel)

DISK SIZE BLOCK SIZE

IN

BYTES

MBYTES 8192 4096 2048 1024 512 256

20 0.3 0.3 0.4 0.6

1.1

1.9

40 0.5 0.6 0.9 1.3 2.1 3.8

60 0.8 1.0 1.3 1.9 3.1 5.7

80 1.0 1.3 1.7 2.5 4.2 7.6

100 1.4 1.6 2.2 3.2 5.3 9.5

160 2.2 2.6

~.5

5.1 8.5 15.2

200 2.7 3.2

403

6.5 10.5

19,,0

Table

11. Number

of

Reels

of

Tape

for

Various

Capacity

and Block Size

at

3200 bpi

(2400'

Reel)

'-/-7

TAPE

CAPACITY

The

total

number of bytes

to

be

stored

in a

single

reel

of

tape

varies with

the

block

size.

Figure

29

gives an

idea

of

the

capacity

achievable

for

various block lengths. The

chart

allows for a

standard

gap

size

of

0.6 inch and

takes

into

account

the

preamble and

postamble

characters

required

for

each

block

of

data

recorded

in PE

format.

en

w

I-

>

CD

«

(!)

w

~

z

>

I-

U

e:(

a..

«

CJ

w

(!)

«

a:::

0

I-

en

CIPHER

DATA

PRODUCTS

MICROSTREAMER

F8aO

STORAGE

CAPACITY

10%"

TAPE REEL

-70-

- -

.-

- -

--

---

--

- - - - - - -

--=...;;;:-----.,

60

8K

BLOCKS 50

40-

-30-

1K {

BLOCK·

__

20

10

2 3 4 5 6 7 8

BLOCK SIZE

IN

THOUSANDS'

BYTES

Figure 29.

Storage

Capacity

vs Block Size

3200

BPI

1600

BPI

9

NOUS

A.

IIIEw

lou

..

MI'lIlacl

..

1I

,

.....

_la

.....

I.

IIIWU

loo.alA'III,,, '.1111

OA

."

..

Ia"h !un'.ldl.

o.

tlIP'"d."

I.

'IP'

'OIlIl~II.lIlnap",.

IN.

hi

.....

fI.pu"uDn

lI.h

.. I

....

'utl"l

'''I11III

COlRmtntl.

FLASH

FRONT

PANEL

LOAD

LIGHT

FLASH

fRONT

PANEL

UNLOAD

LIGHT

SET

UP

TACH

fOR

SHEeTED

SPEED

Figure 2-45.

On

Line Sequence

-C

,

-

o

~ROCESS

COMMANO

OECOOE

COMMANO

AND

JUMP

TO

COMMAND

PROCESSING

I

SEARCH

I:ORWARD

FILE

WITH

DATA

I r

SEARCH

REVERSE

FILE

WITH

DATA

I

C

SEARCH

FORWARD

FILE

1 1

SEARCH

REVERSE

FILE

1

r

READ

REVERSE/EDIT

I I

READ

FORWARD

I

WRITE

FMK

I

I·

SPACE

REVERSE

I

WRITE

BLOCK/EDIT

I 1

SPACE

FORWARD

I

ERASE

FIXED

LENGTH

GAP

J I

SECURITY

ERASE

I

ERASE

VARIABl.E

LENGTH

GAP

I

Figure

2-1.6.

Process

Command

Sequence

POLARIZED

TAPE

WRITE

CURRENT

READ

CURRENT

DATA

BIT

STORED

ON

TAPE

DATA

TIME

PHASE

TIME

I I

I

SI

I

_I

o

DIRECTION

OF

POLARIZATION

CHANGES

EVERY

DATA

TIME

S

o o

DIRECTION

OF

POLARIZATION

.__--

CHANGES

AT

PHASE

TIME

BETWEEN

BITS

OF

SAME

TYPE

Figure 2-1. Phose-Encoded Tope

Magnetization

0>

-C.

Ol

0

I

'"

r

Tape

shown

with

oxide

side

down.

RNI

head

on

same

side

as

oxide.

r

14

FT

END

OF

TAPE

MARKER

--.

(EDT)

!-3IN.

MIN.

I·

SFT

. I '

a~------~I---------~·----------~------------~'-

~

I .: i

2

1---,------

RECORDING

AREA

----:

~

I I

10

FT.

MIN'

I

~_--tII-+-1.7

IN.

MIN.

. 4

6

o

1

2

p

IUUIKIIIaIIIIUlII

3

1

~

I :

L-

____

-J==~~

__________

~S

FILE

MARK

D[

'-

BEGINNING

OF

TAPE

MARKER

(OOT)

FILE

MARK

CODE

ZONE

3

ERASED

~~ZONE

2

ALL·ZEROS

OURST

~

ZONE

1

ERASED

OR

ALL

ZEROS

BURST

40

ALL·ZERO

~I

DATA

BYTES

1

ALL·ONES

BYTE

..,

POSTAMBLE

I~

\

Figure 2-2.

Nine-track

PE

Data

Format

IDENTIFICATION

BURST.

THE

TRAILING

EDGE

(LEFT)

MUST

NOT

OCCUR

BEFORE

THE

TRAILING

END

OF

THE

BOT

MARKER.

40

ALL·ZERO

0

BYTES

1

ALL·ONES

BYTE

..,

I

PREAMBLE

STREAIIIING-TAPE OPERATION

2-10.

Streaming-tape

operation

is

simply

writing

data

to

tape

without

stopping and

starting

between

each

record

block. Interblock

gaps,

as

required

in

the

ANSI

format,

are

inserted

automatically

"on

the

fly".

Figure

2-3

illustrates

in

the

simplest

form

what

a

streaming

drive

will

automatically

perform

if for any reason

the

unit

must

start

and

stop

after

each

block.

As

can

be

seen

in

the

diagram,

there

is a period

of

time

called

Command

Reinstruct

Time.

This is

the

time

after

reading

or

writing

the

lost

character

of

the

last

block in which

the

system

must

instruct

the

tape

drive

to

continue

or

after

reaching

point

B,

the

tape

drive

will

enter

what

is known

as

a

reposition

ing

cycle.

If

the

command

to

continue

reading

or

writing

is

not

received

by

the

time

normal

forward

velocity

reaches

point

B,

the

drive

automatically

decelerates,

coming

to

rest

at

point

E. This

sequence

is

called

repositioning.

After

coming

to

rest

at

point

E,

the

unit

waits

for

the

to

read

or

write.

The

time

from point E

to

point

F is

defined

as

access

time.

This repositioning and

access

time

may

be

thought

of

as

latency

time

which will vary ciepending upon when

the

is

issued

with

respect

to

the

last

read

or

write

character.

Each

leg

at

100

ips

takes

about

240

ms,

B-C

= 240 ms, D-E = 240 ms. Total repositioning plus

access

time

equals

1025 ms

at

100 ips

and

150

ms

at

25 ips.

..

E ••

"'-

aaC-i52

BLOCK I

INTER BLOCK GAP I BLOCK

(IBG)

~~~~~~3CT

LjL

~~;I

TIME

I

BYTE

NORMAL

A B F

FORWARD

___

043>>-~

•

.'

______

....;J""III!<:~..;.f_~~.

VELOCITY

••••

••

..

.,

..

" "

......

,

......

."

..

•••••

ACCELERATE

•••••

FORWARD

DECELERATE'

"

FORWARD

......

,

..

......

, DECELERATE

.......

~

REVERSE

......

,

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

.......

'--

----...."",

40

ACCELERATE

//

REVERSE

./

,./¥

,./

,

......

./

>c

,./

/

___

REPOSITIONING TIME

••••••••

ACCESS

TI

ME

Figure

2-3. Repositioning

Cycle

'-/

...

18

forward

direction

than

in

the

reverse

direction

and

sliqhtly

more

time

is

required

to

accelerate

in

the

reverse

direction

than

in

the

forwa-rd

direction.

This

causes

the

graph

to

become

distorted,

as

shown in

Figure

2-4 E.

2-14.

:r

0 allow for minor

variations

in

acceleration

and

deceleration

rates,

the

tape

is allowed

to

run

at

speed

for

short

distances

during

repositioning.

This provides an

offset,

which

is

shown

as

points

("

and

C'

in

Figures

2-4 D and E.

After

repositioning,

the

record

head

might

be

left

several

data

blocks in

front

of

the

point

at

which

the

or

read

operation

is

to

take

place.

If

one

command

is followed by

another

in

the

opposite

direction,

it

becomes

necessary

to

perform

an

additional

repositioning

to allow

the

required

distance

for

tape

acceleration,

as

illustrated

in

Figure

2-5.

This

illustration

represents

a

reverse

read

following a

write

forward.

It

can

be

seen

that

the

second reposition

is

a

retrace

of

the

first.

It is shown

offset

in

time

for

clarity

only. The double repositioning

can

be

partially

prevented

if

the

new

command

is

issued

somewhere

along

segments

AB

or

Be,

in which

case

that

segment

will

be

completed

and

the

command

executed

in

the

normal manner"

If

point

C has been

reached,

however,

the

entire

repositioning

must

be

completed.

Repositioning

may

be

required

when a high-speed

operation

follows a low-speed

operation,

even

if

they

are

of

the

same

category

and in

the

same

direction

and

the

new

command

is issued within

the

reinstruct

time.

This is

necessary

to

allow

the

tape

ample

time

to

accelerate

to

record

speed.

Figure

2:-6

illustrates

this

and

represents

a

high-speed

space

file

forward following a low-speed

read.

Repositioning will

also

occur

at

other

times,

for

example,

prior

to

rewinding.

REPOSITIONING

-I

Figure

2-4Ae

Ramp

Down (FWD)

S20-153

4-1,-/

880-155

EOT

DIRECTION

~"I---

HEAD

BOT

~~~====D=A=TA=B=L=O=CK==~I~~-

IB

I

C

---I

....

TIME

V=o------~~----------------------------

TAPE

I

VELOCITY

+

Figure

2-48.

Ramp Up (REV)

I

EaT I

HEAD

BOT

DIRECTION

<4~~~------~----------~--t:~I=D=A=T=A~~~~~B=LO=C=K~~~-

----------------------~IC=l====~w~D~====~--

eaT

B

V=Q

--

I 30

MS

(25 IPS)' 240

MS

(100

IPS)

..

..,

I I

----5.

~.

TIME

V = 0

------r--------Io---~~----

(REV)

~

TAPE

VELOCITY

Figure 2-4C. Ramp Down (REV)

Figure

2-4D.

Composite

Ramps

at

100

ips

o

BOT

880-157

EOT

B

V=o

--

EOT

880-158

BOT

o

Figure 2-4E. Composite Ramps

at

25

ips

A

BOT

Figure

2-5.

Reverse

IJirection

Repositioning

L/-

r~

j---'

I

DATAl

V

~

HI

-

----

---'

BOT'

At

Va

LO

----<J~~-

...

880-159

Fiqure

2-6.

Low Speed

to

High Speed Reposition ing

MAJOR TRANSPORT COMPONENTS

2-15.·

The

Cipher

Model F880

MTSU

transport

is

composed

of

three

main

assemblies:

the

drive

assembly,

which includes

the

tape

drive

components

and

the

compliance

arm

system;

the

power supply

system,

which

consists

of

a

transformer

and

a

power

supply

assembly

mounted

on

the

bottom

of

the

top

plate;

and

the

formatter

printed

wiring

board

(PWB), which

contains

the

voltage

regulation

circuitry,

servo

control

logic

circuitry,

reel

motor

servos,

sensor

circuits,

write

and

read

circuits,

and

input/output

(I/O)

interface

circuits.

2-16.

Power

Supply/System

Failure

Detect

Circuit.

The power supply assembly

consists

of

a RFI line

filter,

ac

line fuse, and

rectifier

circuits.

The

voltage

regulators

and

system

failure

detect

circuits

are

located

on

the

formatter

P'NB. The

system

failure

detect

circuitry

removes

the

drive

voltage

from

the

servo

motors

in

the

event

of

a power

failure

or

microprocessor

failure.

2-17.

Control

Logic

Circuitry.

A Z80

microprocessor

with

associated

I/O chips,

serves

as

the

primary

control

element

in

the

F880 MTSU. The

program

is

stored

in

8K

of

on-board

programmable

read-only

memory

(PROM)

circuits.

2-18.

Takeup/Supply Servo

Circuits.

Both

takeup

and supply

servos

incorporate

voltage

and

current

feedback

lines which

are

used

to

control

the

speed and

torque

of

the

reel

motors.

These

feedback

lines

are

also

used by

the

microprocessor

to

select

either

the

voltage

drive or

current

drive signal for

servo

control.

l/-

17

WRITE

COMMAND REVERSE WRITE FILEMARK EDIT ERASE

Read

Forward

0 0 0 0 0

Read

Reverse

1 0 0 0 0

Read

Reverse

Edit 1 0 0 1 0

Write

0 1 0 0 0

Write

Edit

0 1 0 1 0

\Vrite

File

Mark 0 1 1 0 0

Erase

Variable

Length

0 1 0 0 1

Erase

Fixed

Length

0 1 1 a 1

Security

Erase

0 1 1 1 1

Space

Forward

0 0 0 0 1

Space

Reverse

1 0 0 0 1

File

Search

Forward

0 0 1 0 0

File

Search

Forward

0 0 1 0 1

(Ignore

Data)

File

Search

Reverse

1 0 1 0 0

File

Search

Reverse

1 0 1 0 1

(Ignore

Data)

No

Operation

Decode

0 0 0 1 1

3200 bpi* 1 0 1 1 1

1600 bpi (PE)* 0 0 1 1 I

Diagnostic

Routine

0 0 1 1 0

Cycle

Servos

0 0 a 0 0

Exit

Test

22 Any

Command

Read

Logic Margin

Test

1 0 0 0 0

+5

Vcc

Circuit

Margin

Test

0 1 0 0 0

Reset

Margin

Tests

1 1 0 0 0

Extended

Status

0 0 1 0 0

*Microstreamer

2 only

Table

3.

Command

Decoding

y-l

g

IREW

IFEN

IRWU

ITADO

ITAD1

IFAD

IREV

IWRT

IEDIT

IERASE

IWFM

(HISP

-

P1

20

P2

P1

46

,.!1

18

I--

~

42

a-

P2

50

.!l

IGO

ILWO

IW4

rwo

IW1

IWP

IW7

-~

IW3

IW6

IW2

IW5

-

~

6

io-

...!i

..!!.

.B.

~

28

r-

~

32

"'--

INTERFACE INPUT

INTERFACE

STATUS

REGISTERS

FSEL i

ADDRESS TRANSPORT

DECODE CONTROL

LOGIC

READ

FORMATTER

I

t ENRD

READ

WRITE

COMMAND

SPACE

DECODE ERASE READIWRITE

SEARCH CONTROL

HI DEN LOGIC

NO·OP

DIAGNOSTIC

ENRO·

•

WRITE

FORMATTER

Figure

1

0..

Transport

Interface

Diagram

P2

$

1

!0-

f--

2t--

~

+

!--

~

8~

"'--

10

~

---

~

"-

14

-

-16 -

-

20~

~

34~

~"-

P1

48

50

P2

36

IRWO

IONl

IFBY

ILDP

IEOT

IROY

IFPT

lOSSY

ISPEED

IRP

IRO

IR1

IR4

IR7

IR6

IHER

IFMK

IOENT

IRS

IRSTR

ICER

IR2

IR3

IWSTR

880.43

IRWD..

This I-microsecond (minimum) pulse

initiates

REWIND in

the

selected,

ready (not

at

load point)

transport.

If

the

selected

transport

is

at

load point,

the

command is

ignored. The

REWIND

command does

not

assert

the

IFBSY

or

IDBSY

status

line. The

IRWD

status

will go

true

within less

than

1 microsecond, and

the

IRDY will go false. A

new command

to

this drive should

be

delayed until

the

status

IRDY is

true

and

IRWD

is

false.

Other

daisy-chained

transports

may be addressed while

the

transport

is

rewinding. The pl)ysical

operation

of

a rewind involves running

at

25

ips for

about

20

inches in

the

forward

direction

before

the

reverse

motion occurs. The

average

rewind

speed is approximately 175 ips. When

the

tape

reaches

BOT,

the

drive ramps down and

returns

to

BOT,

where

it

stops,

setting

the

ILDP and IRDY and

resetting

the

IRWD

status.

IRWU. This pulse

(I

microsecond minimum) modifies

the

standard

rewind command by

resetting

the

ON

LINE

status

flip/flop and

initiating

an unload

sequence

when

the

transport

encounters

BOT.

IFEN. This signal, which must

be

asserted

by

the

controller,

may be pulsed high

(2

microseconds, minimum)

to

reset

a READ, SEARCH,

or

WRITE

command runaway during

DBSY.

It

is ignored when

DBSY

is false. Command

termination

occurs

within 50

milliseconds with a normal sequence:

IDBSY

drops,

then

IFBSY drops. This command

cannot

be

used

to

terminate

REWIND, UNLOAD, ERASE FIXED,

WRITE

FILE MARK,

or

extended

status

commands, since

these

commands

cannot

"run away".

By

limiting

the

IFEN in this way,

all

runaways

can

be

terminated

in

an

orderly manner with no loss

of

tape

information.

IHISP. When

asserted,

the

Model F880

transport

operates

at

100 ips. This line must

be

set

up a minimum of 1 microsecond ahead

of

the

trailing

edge

of

IGO. Since

it

is

latched

in

the

transport,

there

is

no

hold

time

requirement.

Repositioning when switching speed

is

automatic

but

delays

the

first

command by

about

1.2 seconds.

There

is no

restriction

as

to

when speed may

be

changed from 25

to

100,

or

100

to

25 ips. Thus

the

user

may

initiate

a high-speed file

search

followed by low-speed

data

transfers,

if

this

system

is

not

able

to

utilize

the

full, high-speed,

streaming

data

modes. All repositioning during

speed switching is

automatic

and

transparent

to

the

user.

IFBY. This signal goes

true

within 1 microsecond following

the

trailing edge

of

IGO and

goes

false

following command completion.

It

is

not

desirable

to

wait

for IFBY

to

be

reset

before

issuing additional commands. The use of

the

trailing

edge

of

IDBSY

is

recommended.

lOSSY. This signal goes.

true

after

any repositioning,

staying

true

during

the

active

execution

of all commands

initiated

by

the

IGO. On

the

trailing edge

of

this signal,

another

command of any

type,

direction,

or speed may

be

given.

IDBSY

goes

true

as

soon

as

the

tape

has

reached

operating

speed.

IDBSY

will go

true

at

least

100 microseconds

before

any

data

transfer,

end

of

file,

or

block

detection.

IDENT. This is a level which goes

true

to

identify 1600 bpi phase-encoded (PE)

tapes.

When

reading forward from

the

BOT,

the

formatter

monitors

the

parity

c..'1annel

for

the

presence

of

the

identification

burst.

If an

identification

burst

is

detected,

this line is

set

true

for a

short

period of

time

as

the

BOT

passes over

the

read

head. An

identification

mark is

not

generated

during 3200 bpi operation. An

ID

burst

is

detected

by

the

presence

of

more

than

80

character

periods where only

the

parity

channel is

recorded,

with

the

other

channels

erased.

Tne

absence

of an iD

burst

w iii

not

prevent

the

transport

from

reading an otherwise valid

1600'

bpi

tape.

4-2<:::>

DIER. This signal is pulsed when

the

record being

written/read

contains an uncorrectable

error.

The line goes low when an

error

is

detected

before lOSSY goes false. Error

conditions asserting this line include

the

following:

a. Mutiple-track dropout: Two or more

tracks

have analog envelopes dropping

below

the

operating threshold before passing through

the

postamble. This is

the

most common type

of

hard

error

and can be distinguished from

the

others

since

it

always occurs more

than

25

microseconds

after

a

correctable

error.

b. Uncorrectable

parity

error:

All

tracks

have valid envelopes, but the parity is

even and

the

postamble has not

yet

been

detected.

This

error

can be

detected

by

the

absence of ICER while IHER is

set,

together with parity

error

on

the

transmitted

data.

An

ICER may occur

later,

since

the

postamble is unlikely

to

be

detected.

This

error

can

be caused

by

writing

of

incorrect

parity when

the

external

write parity option is selected.

It

may

also indicate excessive

write-to-read

crosstalk or high noise between chassis

and signal ground

(if

local grounding wire inside

the

transport is removed).

c.

Non-O

character

in postamble: The only allowable

character

in the

postamble is a 0 (with even parity). This is checked during

the

first

20

postamble

character

intervals.

d. Excessive skew: This

error

detection

is indirect. A

character

bit will be

lost, causing an unavoidable postamble

detection

failure and a consequent

parity

error

when

the

postamble is

entered.

e.

Loss

of

data

envelope

after

postamble detection:

20

character

intervals

after

the

postamble provide

time

for

the

postamble

to

end and envelope

detectors

to

decay_

At

the

end

of

this

time

there

must

be

at

least

eight

quiescent

data

channels,

or

an

error

will be reported.

leER.

This signal is pulsed when a signal-track dropout is

detected

and

error

correction

is in process. This will occur before lOSSY goes false. These pulses occur throughout

the

rest

of

the

data

block, and they must

be

latched

to

be

sensed

at

the

lOSSY transition.

NOTE

To

ensure IBM/ANSI compatibility,

the

system

must rewrite records containing hard or

corrected

errors on a

read-after-write

verification.

IFMK. This line is pulsed on a write verification or read operation when an ISM/ANSI

compatible file mark is

detected.

This occurs prior

to

a false-going lOSSY.

If

a file

mark is not

detected

during a file mark write operation,

the

bad file mark should be

backspaced with a SPACE

REVERSE

command, and

the

file mark should be

rewritten.

For maximum

data

reliability, a file mark is

detected

using majority logic. A file mark

is sensed when any two of

the

three

tracks

(channels 2, 6, and 7) which must

be

present

are

present for

at

least

15

characters

periods, and all

three

of

the

erased channels

(channel

I,

3, and

4)

are

absent. This technique provides

automatic

dead

track

recovery

of

file marks, which is essential, as

error

handling of file marks is notoriously poor in

most computer

tape

systems.

IRDY.

This level indicates

that

tape

is tensioned and is not rewinding,

off

line, loading,

or

unloading. In

the

event

of

a hard fault shutdown,

the

drive goes

off

line and not

ready. This line should be used

to

precondition any

tape

drive command.

IONL.

This level indicates

that

transport

on-line flip-flop is

set.

The

transport

may be

placed on line during

or

after

tape

load whenever

the

drive was

off

line. This will

go

false within 1 microsecond

of

the

reception

of

an UNLOAD command.

When

IONL

is

faJse, IRDY will be false.

IRYD.

This level indicates

that

the

transport

is

in rewind

to

beginning

of

tape

sequence. The

status

goes

true

within 1 microsecond

of

the

REWIN

0 command and

stays

true

until

the

tape

returns

to

BOT. IRDY

is

false while

the

drive

is

rewinding.

IFPT. This level indicates

that

the

loaded

reel

has

no

write

permit ring, hence

the

write

electronics

are

disabled, and write commands

are

prohibitedo This

status

goes

true

during

the

tape-load sequence before

the

transport goes ready. This

status

is

valid

at

all

times when

tape

is

loaded. .

D..DP.

This level

is

true

when

the

load-point

reflective

marker is logically

at

the

sensor. Since normal operation

of

the

transport requires long ramps and repositions,

when a command

is

executed

at

BOT,

the

ILDP

status

will remain

true

during

the

repositions. This is especially noticeable

at

100

ips, when ILDP will remain

true

for 0.5

seconds

after

a command.

If

a REVERSE command runs into BOT, a command

reset

occurs with ILDP being

set.

If

an illegal reverse command occurs

at

BOT, ILDP will

remain

true,

but

IFBY

and

IDBSY

will sequence quickly (in less than

10

milliseconds) in

order

to

retain

compatibility with

other

commands.

In

order

to

erase

Model F880

interface

design,

ILDP

goes

true

only

at

the

end of a

REWIND

and

is

not

set

even when

crossed over physically by

the

transport

if

it

is

"repositioning" and is not logically

at

the

BOT

marker.

1E0T.

This level indicates

that

the

end-of-tape marker is

past

the

read/write

head. This

signal will

go

false

either

on a rewind

or

by backing

up

over

the

EOT

marker. This signal

should be considered ac;curate only

to

a few inches.

ISPEED. This signal

is

asserted when

the

transport

is operating in

the

high-speed mode.

It

is valid

after

100

Y goes

true

for

the

associated command and

is

latched until

the

command.

COMMAND DECODE

Basic

transport

commands

are

derived

by

decoding

the

REVERSE,

WRITE,

WRITE

FILE

MARK, EDIT,

and

ERASE

interface

lines.

When

a command

is

issued

to

the

transport

from

the

controller,

the

transport

asserts

the

IFBY line and performs all

timing

and

control functions necessary for

the

execution of

the

command.

The command lines

are

transferred

to

the

command registers on

the

trailing edge

of

the

IGO pulse.

Any

errors occurring during

the

execution of

the

command

are

reported

to

the

controller via

the

IHER

or

leER

interface

lines. Upon completion of

the

command,

the

IDBSY

interface

line goes false, notifying

the

controller

that

it

may issue

another

command. All legal combinations

of

the

interface

lines

are

listed in Table 3. The

interface

lines used for

COfnmaoo

decoding are defined as follows:

4-2"2

a.

REVERSE

(IREV).

This is a level which, when

true,

specifies reverse

tape

motion and when false, specifies forward

tape

motion.

be

WRITE

(IWRT).

This is a level which, when

true,

specifies

the

write mode of

operation and when false, specifies

the

read mode of operation.

c.

WRITE

FILE

MARK

(IWFM).

This is a level which, when

true

and

IWRT

is

also

true,

causes a file mark to be

written

on

the

tape.

d.

EDIT

(IEDIT).

When

this level is

true

and

IWRT

is

true,

the

transport

operates

in

the

edit

mode.

e.

ERASE (IERASE). This is a level which when

true

in conjunction with a

true

level

on

the

IWRT

line, causes

the

transport to

execute

an erase variable

length command. The transport will be conditioned to

execute

a normal

write command but

no

data

will be recorded. A length of

tape,

as

defined by

ILWD,

will be erased. Alternately, if IERASE,

IWRT,

and

IWFM

command

lines

are

true,

the

transport is conditioned

to

execute

a dummy

write

file

mark command. A fixed length of

tape

of approximately 3.75 inches will be

erased.

When

command lines

IWRT,

IWFM,

IEDIT, and IERASE

are

true

the

transport is conditioned to

execute

a security

erase

operation. A length of

tape,

from

the

point where

the

command was issued to 5

feet

beyond EOT,

will be erased.

IGO. This is a guIse with a minimum duration of I microsecond. The trailing edge

initiates

tape

motion

of

the

selected

ready transport, and latches the command into

the

formatting

register. The

formatter

address lines must be held constant from

the

leading

edge

of

IGO

until

IFB

Y goes false.

EXTENDED INTER-RECORD GAPS. During

the

write operation,

if

successive write

commands cannot be issued within

the

normal

reinstruct

times,

the

Microstreamer may

be commanded to continue running forward

at

the

selected

speed and not

enter

a

repositioning cycle. This is accomplished

by

setting

up

the

command lines for a normal

write operation and asserting and holding

the

IGO

interface

signal in

the

true

state

until

data

is available

at

the

interface.

The IRG will be extended to

no

more than 100

inches; otherwise,

the

original gap will reposition automatically.

If

an

IRG

extension

must be cancelled without a new

WRITE

command, a NO-OP command should be placed

on

the

command lines before

IGO

is dropped. This will sequence

IFBY

and

IDBSY

but will

not

generate

a

tape

command.

A second method is available

to

extend the Inter-Record Gap.

When

switch SI-3 is in

the

"ON" position,

the

drive will

generate

IRGs

up

to

1.2 inches in length.

(

DATA

I IRG

I I I

r.-

.6";.2"

__

---I·~1

The above figure shows

how

this

option works.

While

streaming, if

the

next command is

sent

between points A and B

the

drive will

generate

the standard .6-inch IRG.

If

the

is

received between points

Band

C, the drive will begin writing the next record

shortly

after

the

command is received, generating an IRG length between 0.6 and 1.2

inches.

If

the next command

is

received

after

point C,

the

drive will reposition, then

generate

a standard 0.6-inch IRG.

The following

are

the

basic commands

that

can be

executed

by

the

Model F880

tape

transport. These commands

are

strobed by IGO:

READ. The Model F880

tape

transport

reads

data

records

of

file marks in

either

a

forward or reverse direction, generating output

data

(eight lines plus parity) and

data

strobes

to

the controller. A read reverse into load point clears

the

formatter

in

the

same

way as does an IFEN

reset.

A read forward operation will be

terminated

if

it

occurs

more than

15

feet

beyond EOT. This prevents transport operation, which could cause

the

tape

to

run

off

the

end

of

the

supply hub. Recovery threshold

is

automatically lowered

during a read operation in order

to

provide additional reliability. The write threshold

is

approximately

2596,

while

the

read threshold drops

to

10%. The beginning

of

a

data

block

is

detected

by

the

presence

of

two or more

data

channel envelopes which exceed

the

threshold for

15

to

20

consecutive

character

intervals. For purposes of End-of-Block

detection,

the

presence of less

than

two channels for

15

to

20

consecutive

character

intervals generates Gap

Detect

and drops

IDBSY.

During

the

read operation,

error

detection,

data

transfer,

and file mark search occur. These lOSSY lines may be strobed

by

the

trailing edge

of

IDBSY.

They remain valid for

at

least

1 and

no

longer

than

100

microseconds.

SPACE (Forward and Reverse). This operation is identical

to

a standard Read,

except

-

that

Read Strobe and

error

flags

are

not generated.

FILE SEARCH. This signal initiates a space operation in

either

the

forward or

the

reverse direction. The read

data

lines may be

deactivated

during file search operation,

thereby ignoring any

data

that

is

written

on

the

tape.

The File Search command is

terminated

when:

a.

A file mark is encountered.

b. Load point

is

encountered in a reverse direction.

c.

The

formatter

is externally

cleared.

d. The

tape

is

past EOT

by

15

feet

or more.

WRITE

(Forward only). The Microstreamer

tape

transport

starts

tape

and generates

the

proper delay before transferring

the

data

character,

ensuring the generation

of

com patible inter-record gaps.

When

writing from load point,

the

dual-speed

tape

drive

always generates

the

required PE identification burst.

When

lOSSY goes

true,

it

indicates

that

the

first

IWSTR

(write strobe) will occur no sooner than

40

character

intervals

later.

The write operation continues until

ILWD

(Last

Word)

is received

by

the

transport, which indicates

the

last

character

in

the

data

block.

True write operations (not erase)

generate

an

automatic

read verification with

the

signals

activated

as in read commands,

except

that

signal thresholds

are

higher (25%).

WRITE

COMMAND REVERSE

WRITE

FILEMARK EDIT ERASE

Read Forward 0 0 0 0 0

Read

Reverse

1 0 0 0 0

Read

Reverse

Edit 1 0 0 1 0

Write 0 1 0 0 0

Write Edit 0 1 0 1 0

Write

File

Mark 0 1 1 0 0

Erase

Variable Length 0 1 0 0 1

Erase

Fixed Length 0 1 1 0 1

Security

Erase

0 1 1 1 1

Space Forward 0 0 0 0 1

Space

Reverse

1 0 0 0 1

File

Search

Forward 0 0 1 0 0

File

Search

Forward 0 0 1 0 1

(Ignore Data)

File

Search

Reverse

1 0 1 0 0

File

Search

Reverse

1 0 1 0 1

(Ignore

Data)

No

Operation

Decode 0 0 0 1 1

3200 bpi* 1 0 1 1 1

1600 bpi (PE)* 0 0 1 1 1 .

Diagnostic Routine 0 0 1 1 0

Cycle

Servos 0 0 0 0 0

Exit

Test

22 Any Command

Read Logic Margin

Test

1 0 0 0 0

+5

Vcc

Circuit

Margin

Test

0 1 0 0 0

Reset

Margin

Tests

1 1 0 0 0

Extended

Status

0 0 1 0 0

*Microstreamer

2 only

Table 3. Command Decoding

There

are

several

variations

to

the

basic write operation, as . explained in

the

following

subparagraphs.

EDIT. This signal

is

identical

to

basic write operation (or

its

variations),

except

that

erase and write head

currents

are

sequenced on

to

over lap

the

record being

rewritten.

This operation should

be

preceded

by

a read reverse or read reverse

edit

command

to

position in front

of

the

block being'edited. A block should be edited

no

more than

three

times

to

ensure proper gap spacing.

VIRlTE

FILE

MARK.

This signal generates

the

compatible file mark and produces a

(4.0-mch) IRG gap. The read file mark

circuitry

is

activated.

If

a file mark

status

is not returned,

the

file mark should

be

backspaced and

rewritten.

File mark

identification

is

reliable, since

it

is

recovered

by

means

of

majority gating. All

required and optional

tracks

are being

written

with

80

transitions

(40

characters)

of

O's. ChanneJs 1, 3, and 4

are

dc

erased.

ERASE. This signal produces an

erase

field

at

the

head with no

data

flux transitions.

There

are

three

variations

to

this command,

as

follows:

ERASE FIXED LENGTH: erases a fixed length

of

tape

(4

inches).

ERASE V ARIABLE LENGTH: continuous erasure until

terminated

by

the

controller. Length is determined

by

the

last

character

flag used in a normal

write

operation.

SECURITY ERASE: erase forward

to

EOT

and 5

feet

beyond.

No

status

lines

are

activated;

other

transports may be selected while a SECURITY ERASE is

occurring.

It

is not necessary

to

wait for

IFBSY

to

drop before selection

of

another

transport, but

it

is preferable

to

wait for IDBSY. The transport may also be

commanded

to

rewind

after

completion

of

SECURITY ERASE simply

by

issuing a

REWIND.

The transport will indicate an immediate rewinding

status,

dropping

the

IDBSY,

IRDY, and IFBSY, but will complete SECURITY ERASE and a REWIND

automatically. Other transports may be

selected

and used during execution

of

these com mands.

NO-OPERA

nON

DECODE. This command specifies

no

operation

of

the

transport,

and

may be used

to

stabilize

the

command lines during extended inter-record gap operation.

3200 BPL This is a command which,· when initiated while

at

the

BOT

marker, specifies

the

3200 bpi mode

of

operation. This option is available only on

the

Microstreamer 2.

1600

BPL

This is a command which, when initiated while

at

the

BOT

marker, specifies

the

PE mode

of

operation.

DIAGNOSTIC

ROUTINE.

This is a command which, when initiated, redefines

the

command coding

to

allow

the

selection

of

internal diagnostic routines while

the

transport

~

L.,

the

cn=line mode.

Tr.e

subsequent command, which

seleCts

tr.e specific diagnostic,

must be available within 1 second

of

the

ON-LINE

DIAGNOSTIC

command.

a.

Cycle Servos: (Identical

to

Service

Aid

22)

b. Read Logic Margin Test: (identicai

to

Service

Aid

i

i)

c.

+5

Vcc Circuit Margin Test: (Identical

to

Service

Aid

13)

d.

Reset

Margin

Tests:

(Identical

to

Service Aid

12)

e.

Extended

Status:

The

transport

will

output

128 bytes

of

information

in

the

form

of

256

nybbles (half-bytes) with

the

low nybble

of

each

byte

first.

The

user

must

pack

the

nybbles

to

restore

the

byte

information.

READI\VRITE DATA LINES

IWSTR. This is a pulse indicating (trailing edge)

that

the

character

on

the

data

lines has

been

written

on

tape

and

the

is needed. The

next-character

and last-word

flag

must

have a

set-up

time

of

at

least

300 nanoseconds ahead

of

the

trailing

edge

of

the

IWSTR. This timing is

illustrated

in Figure 11. The frequency

of

the

WSTR

pulse is

proportional

to

tape

speed multiplied by

bit

density. The width

of

IWSTR

is

2.0

(:1:0.1)

IGOU

IOBSY

~----------------------~/,~'-----

IWSTR

ILWD

,.;////////!/

o/IJ

TS

= 300 NANOSECONDS

(MINIMUM)

TH = 0 NANOSECONDS

(MAXIMUM)

TL

= 25.00 MICROSECON

OS

@ 25 IPS

= 6.25 MICROSECONDS @

100

IPS

Figure

11".

Write Strobe Timing

microseconds. The following

equation

represents

the

relationship

WSTR

frequency

to

tape

speed and

bit

density:

fw = (v) X (bpi)

e.g.:

@

100

ips PE

.c

,

L'

n

nl'\n

b'"

I

-d

loW

=

J.O·J,·Jij'J

YLes,seCon

4-21

awn. This is a flag

associated

with

the

last

write

data

character.

The

set-up

time

must

be

at

least

300 nanoseconds

ahead

of

the

trailing

edge

of

IWSTR.

There

is no hold

time

requirement.

This flag

is

also

used

to

terminate

the

WRITE command and

Erase

Variable

Length

command.

IWP, 1'1'0-7. These

are

Write

Data

Lines. They

must

be

set

up with

the

same

timing

as

ILWD.

IRSTR. This is a pulse which

indicates

that

a

read

character

is

present

on

the

controller

interface.

Note

that

although

average

long

term

transfer

rate

is

the

same

as

for

write

data,

due

to

skew

and

velocity

change,

the

instantaneous

rate

can

be

almost

twice

that

of

the

write

data.

The

fall

of

lOSSY should be used

to

indicate

the

end

of

the

command,

since

not

all

read

and

write

commands will

produce

read

strobes.

Figure

12

illustrates

IRSTR

timings.

IRP,

1R0-7. These

are

read

data

lines

to

the

controller.. Timing is

indicated

in

Figure

12. The

read

data

lines

overlap

the

IRSTR by

at

least

500 nanoseconds"

IRSTR

I I I I

I

1.-

T4

I

~T3

I

T2

~

I c • I I

I I I I

I I I I I

I

I.-n

I I I I

...

-I I I I

I I I I I

I I -X

I I

IRP,IRO-IR7

=ox

X I

T 1 (MINIMUM) = 100 NANOSECONDS

T2 (MINIMUM) = 3.5 MICROSECON

DS

@ 100 IPS

= I", MICROSECONDS @ 25 IPS

T2 (AVERAGE) = 6 MICROSECONDS @ 100 IPS

= 25 MICROSECONDS @ 25 IPS

T3

(N

OMIN

AL) = 1.5 MICROSECONDS

0.5

MS)

T4

(MINIMUM) -

500

NANOSECONDS

Figure

12.

Read

Strobe

Timing

PLUG LIVE GRD

NO. PIN PIN . SIGNAL TYPE FUNCTION

PI I, 3

Last

Word (lLWD) Level When

true,

during

write,

indicates

that

the

character

to

be

strobed

into

the

formatter

is

the

last

character

of

the

record.

PI 6 5 Write

Data

4 (lW4) Level -

PI B 7

Initiate

Command

Pulse

·With

MTSU

ready

and on line,

the

(lGO)

command

specified

on

the

command

lines

is

initiated

on

the

trailing

edge

of

IGO

•

PI

10

9 Write

Data

0

(lWO)

Level -

PI

12

II

Write

Data

1

(lW

I ) Level -

PI

IB

17

Reverse

(tREV) Level When

true,

with

MTSU

ready

and online,

causes

tape

to

move

in

the

reverse

direction,

and when folse,

causes

tape

to

move

in

the

forward

di

rection.

1---

PI 20

19

Rewind (lREW) Pulse With

MTSU

ready,

online,

and not

at

BOT,

this

pulse

causes

tape

to

rewind in

reverse

direction.

PI

22

21

Write

Data

Parity

Level -

(lWP)

Table

1-2.

Interface

Input

Connections

J:.

,

lJI

o

PLUG

NO.

PI

P2

LIVE GRD

PIN PIN

24

23

26

25

28

27

30 29

32

31

34 33

40 . 39

42

41

18

17

SIGNAL TYPE FUNCTION

Write

Data

7 (WD7) Level -

Write

Data

3 (tWD3) Level -

\

Write

Data

6 (tWD6) Level -

Write

Data

2 (tWD2) Level -

Write

Data

5 (tWOS) Level -

Write (lWRT) Level When

true,

specifies

the

write

mode

of

operation,

and when folse,

specifies

the

~ead

mode

of

operation.

Erose

(lERASE) Level When

true,

with

MTSU

on line,

specifies

the

erose

mode

of

operation

Write Fi Ie Mark Level When

true,

and

IWRT

is

also

true,

causes

(lWFM) a file

mark

to

be

written

on

the

tope.

Formatter

Enable

Pulse

With MTSU, on line, and

IDBSY

true,

the

(lFEN) pulse

wi

II

reset

a

command

"runaway"

condition.

Table

1-2.

Interface

Input

Connections

(Continued)

PLUG

LIVE

GRD

NO. PIN PIN SIGNAL

TYPE

FUNCTION

P2

24

23

Rew i nd/Un load Pulse When

true,

with

MTSU

on line,

causes

(IREW)

the

selected

unit

to

go

off

line and

rewind

tape

to

the

BOT

marker.

The

MTSU

will unload

the

tape

when BOT

marker

is

detected.

-

P2 50 49

..

High Speed

Select

Level When asser-ted I microsecond ahead

of

(lHISP)

the

trailing

of

IGO, causes

the

transport

to

operate

at

100

ips.

PI

46

45

Transport Address 0 Level The

MTSU

is

selected

by a combination

(lTADO)

of

the

levels on

the

IT

ADO,

IT

AD

I, and

IF

AD

lines and

the

position

of

switches

5 I, 52, and 54.

Refer

to

Volume

I,

Section

II.

-"

P2

46

45

Transport Address I Level -

(lTADI)

P2 48

47

Format

ter

Address Levell -

(IF AD)

PI 38

37

Edit (lEOIT) Level When

true,

with

IWRT

true,

causes

the

M

TSU

to

operate

in

the

edit

mode.

Table 1-2.

Interface

Input Connections (Continued)

-

PLUG LIVE GRD

NO.

PIN'

PIN SIGNAL TYPE FUNCTION

-----

PI 2 I

Formatter

Busy Level Goes

true

on

trailing

edge

of

IGO, when

(lFBY) a

command

is

received

by

the

MTSU, and

remains

true

for

duration

of

the

commande

-

PI 48

47

Read

Data

2 (lR2) --

PI 50 49 Read

Data

3 (lR3) --

-

P2 I -

Read

Data

Parity

--

(IRP)

P2 2 -

Read

Data

0 (lRO) --

P2 3 -Read

Data

(IR I ) --

P2 4 -Load

Point

(lLDP) Level True when BOT

marker

is

positioned in

front

0 f photosensor.

P2 6 5 Read

Dato

4 (lR4) --

P2 8 7 Read

Dota

7 (lR7) - -

P2

10

9 Reod Doto 6 (lR6) --

Tobie 1-3.

Interfoce

Output

Connections

PLUG

LIVE

GRD

NO. PIN PIN SIGNAL TYPE FUNCTION

P2

12

II

Hard Error (IHER) Pulse When

true,

indicates

that

on

or

uncorrectable

read

error

has

been

Level

detected

by

the

MTS~.

P2

14

13

File Mark (IF

MK)

Pulse When

true

indicates

that

the

MTSU

has

detected

a

fi

Ie

mark.

P2

16

15

Indent

ification

Level Goes

true,

when

the

BOT

marker

passes

(IIDENT)

over

the

read head,

to

ident ify 1600 bpi

(PE)

tapes

•

..

P2 20

19

Read

Data

5 (IRS) - -

P2

22

21

End

of

Tape (IEOT) Level When

true,

indicates

thot

the

EOT

nlarker

has been

detected.

IEOT remains

true

until

the

"EOT

marker

is

sensed in

the

reverse

di

rection.

P2 28

27

Ready (IRDY) Level T rue when load

sequence

is

complete

and

MTSU

is

on line and not rewinding.

(MTSU

is

ready

to

receive

a

remote

command.)

Table 1-3.

Interface

Output

Connections (Continued)

L

•

~

PLUG

LIVE

GRD

NO. PIN PIN SIGNAL TYPE FUNCTION

P2 30 29 Rewirding (lRWD) Level True vhen

MTSU

is

selected

and a reel

of

tape

without a

write-enable

ring

is

mounted on

the

M TSU.

--

P2

34 33

Read

Strobe

(lRSTR) Pulse Goes

true

for

each

data

character

read

from

the

tape.

P2 36

35

Write Strobe Pulse When

true

<trailing edge), indicates

that

(lWSTR)

the

character

on

the

data

lines has been

written

on

tape

and

the

is

needed.

P2 38

37

Data

Busy (lDBSY) Level T rue when

the

tape

on

the

se

lected

transport

has

reached

operating

speed.

P2 40 39 High Speed

Status

Level When

true,

indicates

that

the

MTSU

is

(I SPEED)

operating

in

the

high-speed mode. (It

is

also

true

during 3200 bpi

operation.)

-

P2 42

41

Corrected

Error Pulse When

true

indicates

that

a

single-track

(lCER) dropout has been

detected,

and

the

MTSU

is

performing

error

correction.

-

P2

44 43

On

Line (lONL) Level When

true,

indicates

that

the

selected

"MTSU

is

under

remote

control.

When

folse,

MTSU

is

under manual

control.

Table

1-3..

Interface

Output

Corrections

(Continued)

DIAGNOSTICS AND SERVICE AIDS

The Model F880

transport

incorporates

several

different

diagnostics

tests

and

service

aids. These

diagnostic

aids

are

designed

to

protect

(during

certain

fault

conditions)

the

tape

from

damage

and also provide

alignment

and

test

states

for

preventive

maintenance.

The

diagnostic

and

service

aids

are

designed

to

be

used

by

experienced

service

technicians

and,

therefore,

a

special

code

must

be

keyed

in through

the

front

panel

control

switches

to

allow

access

to

the

various

test

functions.

As shown in

Figure

22,

the

front

panel

switches

are

assigned

numeric

values

of

one

through

five

and

the

corresponding

indicators

are

assigned

binary numbers

to

di~play

results

of

the

various

tests.

The

code

to

access

the

various

tests

routines

is divided

into

the

following

parts:

An

10

Code,

a

Service

Aid Number, and

an

Execution

Command.

The

10-

code

(4,5) is

the

same

for

all

Service

Aids

and

entered

by depressing

switch

4

(WRTEN/TEST) followed by

switch

5 (HI DEN).

After

entering

the

ID

code,

the

Service

Aid

Number

must

be

keyed in.

Service

Aids

are

always

two

digit

erodes.

After

entering

the

two-digit

Service

Aid

Number,

the

Execution

Command,

switch

5

(HI

DEN)

must

be

depressed.

An

example:

To

call

for

Service

Aid

11

the

switch

sequence

would be:

ID

Code

•••

Depress

WRTEN/TEST

Depress

HI

DEN (4)

(5)

Service

Aid Number

...

Depress

LOAD/REWIND

Depress

LOAD/REWIND (1)

(1) (2nd time)

Execute

•••

Depress

HI

DEN

(5)

BINARY

COUNT

1 2

4-

8

16

/ f1,l,o

r·i

re'i

r·1

r

Cl

, r

.-t

OJ

L.OAD

UNLOAD

ON·LINE

WATEN

'"'I

REWIND

TEST

OEN

\....J

L..J

\......J

L..J

L....J

SWITCH

NUMBER

1 2 3

-4

5

7..

+

z..

I"

~

5

Figure

22.

Front

Panel

Switches

F'

N

f

\-,\ 1

hi-e~

l

Q(

~.

k

.~

l(,.

...

r'~

_

t;~~,

t

efI3i;;:;'

OPERA

TOR

F AUL T INDICA TORS

The

front

panel

indicators

also provide.

fault

status

information

to

the

operator

•.

There

are

two groups

of

fault

indicationsc

a.

Those which

are

normally

caused

by

the

operator

and

can

be avoided

by

following

the

proper

operating

procedure.

b. Those which

generally

are

machine

malfunctions

and

require

correction

by

an

experienced

service

technician.

The following

fault

indications

require

operator

intervention:

INDICATION

All

indicators

flashing

All indica

tors

except

LOAD

flashing

All

indicators

except

UNLOAD

flashing

All

indicators

except

ON-LINE

flashing

All

indicators

except

TEST

flashing

ERROR

CONDITION

After

four

automatic

retrys

the

transport

did

not

successfully

comp"lete

the

load

sequence.

The

tape

leader

should

be

checked

for

excessi

ve

damage..

If

a second

attempt

at

loading

fails

the

unit

must

be

manually

loaded.

The

BOT

marker

was

not

detected

within

the

first

35

feet

of

tape.

Tape

reel

was

inserted

. upside-

down. Write ring

must

be

down.

A load

operation

was

attempted

with

the

front-panel

door or

top

cover

in

the

open

position

..

A load

operation

was

attempted

without

a

reel

of

tape

inserted

in

the

unit.

Table 6.

Operator

Fault

Codes

The following

error

conditions

require

intervention

by

an

experienced

service

technician:

INDICATION

LOAD

indicator

flashing

UNLOAD

indicator

flashing

LOAD

and

UNLOAD

indicators

flashing

ON-LINE

indicator

flashing

LOAD

and

ON-LINE

indicators

flashing

UNLOAD and ON-LINE

indica

tors

flashing

LOAD, UNLOAD, and ON-LINE

indica

tors

flashing

TEST

indica

tor

flashing

LOAD and TEST

indicators

flashing

UNLOAD and TEST

indicators

flashing

LOAD, UNLOAD, and TEST

indicators

flashing

ON-LINE and TEST

indicators

flashing

LOAD, ON-LINE, and TEST

indicators

flashing

CONDITIONS

Not

Used

Not

Used

The

Model F880

detected

more

than

3700

feet

of

tape

beyond

the

BOT

marker.

The

tension

arm

swing

exceeded

the"

range

of

normal

operation

during

the

load

sequence.

The

Model F880

received

an

interface

co"m

mand prior

to

completion

of

the

The

Model F880

received

a

write

command

with a

write-protected·

reel

of

tape

loaded on

the

transport.

An illegal

or

undefined

command

was

received

by

the

Ntodel F880.

A

failure

of

the

supply hub locking

mechanism

occurred.

Not

Used

The

auto-zero

function

of

the

digital-to-analog

converter

failed

during

the

power-up

sequence.

Not

Used

Supply

reel

was

not

seated

on hub,

or

a

failure

of

the

file

protect

circuit

occurred.

Supply

reel

did

not

remain

unlocked

during

tape

unload

operation.

Table

7..

System

Fault

Codes

INDICATION

UNLOAD, ON-LINE,

and

TEST

indicators

flashing

LOAD, UNLOAD, ON-LINE, and TEST

indicators

flashing

HI

DEN

indicator

flashing

LOAD and

HI

DEN

indicators

flashing

UNLOAD and

HI

DEN

indicators

flashing

CONDITIONS

Because

of a

controller

error,

tape

travel

. beyond

the

EOT

marker

exceeded

18

feet

..

Not

Used

Not

Used

The supply

servo

tension

arm

has

exceeded

its

free

travel

limits

during any

operation

except

those

functions

of

the

load and unload

sequence

where

tape

tension is

not

under

arm

control.

Tape

.speed

variations

in

excess

of

the

ANSI maximum of ± 1

096

deviation

from

the

normal

operating

speed

occurred.

This

test

is also

performed

as

part

of

the

power-up

diagnostic

routine

and

may

be

bypassed

to

allow

access

to

other

diagnostic

tests

by

depressing

the

TEST

switch

for

5

seconds

during

power

up.

Table 7.

System

Fault

Codes (continued)

,..,

'i't(q

j~q

'7

o

c

0

1

SNI~CB

sa

l-lg

I J

2-l5 I J

J-1~

I 2

~-lJ

I"

J

5-12

I 6

I

6-11

I 6

I

7-1~

I

8-09

I

=

CLOSED

IFAD

I

TAD

0 0

0 1

0 I

1 0

1 I

I I

Q~~H

XX

CIPHER

DATA

PRODUCTS

DIP

SWITCH

SETTINGS

FOR

USW

CLQS~D

fImCTIQH

XX

EQBHA~~R

ACDRf:SS

XX

~RANSPOR~

AIlDBESS

RES~RV~D

xx

TRANsmR~

ADDB~SS

(SEE

~A13Lf:l

(SEE

~A13LEl

(SEE

TA13L~l

C =

EXTERNAL

PARITY

SELECT

(Sg

Q~EHl

xx

C =

INTERNAL

PARITY

GENERATION

(S5

QfEHl

RESERVED

RESERVEP

ADDRESS

LINE

Pf:COPING

TA13LE

0 I

TAD

1

Sl

S2 S4

ADDRESS

0 1 1 1 0

1 1 1 0 1

0 1 0 I 2

I I 0 0 3

0 0 I I 4

I 0 I 0 5

0 0 0 I 6

I 0 0 0 7

=

FALSE

INTERFACE

LEVEL

o =

OPEN

=

TRUE

INTERFACE

LEVEL

I =

CLOSED

Ii

;eA~CB

LIS~

PATCH

IN

LOC

SHEET

PATCH

IN

LOC

SHEET

W I * 9 W 2

U6G

9/F

W 3

U7G

9/F

W 4 Ul4P

6/F

W 5 Ul4P

6/F

W 6 * UIIT 6

w 7 Ul0T 6 W 8 * UIIT 6

W 9

U10T

6

WI0

*

UllT

6

Wll

U10T

6

W12

* UIIT 6

W13

U10T

6

W14

USN

2

W1S

XX

U8N

2

W16

XX

U9T

2

Wl7

oaT

2

W18

uaT

2

Wl9

XX

U9T

2

W20

** 3

W21

* 3

*

NO

PATCH

/

CONTINUITY

**

NO

PATCH

/

NO

CONTINUITY

4-5"0

TP

S8

LOC

NAME

0.(4)06

V20P

3.(8)011C6

DCLK

1

6.(4)03Al2

T1DR

9.

(8) 011E6

CLR

12.(4)03A3

VIN

7

15.(5)017

V29P

18.

(4) 03E12

IS

21.(5)

GND

24.

(4)03D3

27

• (8) 013B7

39.

(8) 013E9

33.

(8) 013H9

36.

(5)

SlDR

CHDROP

9

CHDROP

P

CHDROP

5

GND

39.

(7)019A6

HEAD

4

42.(7)017B7

RDATA6

45.(7)019D6

HEAD

1

48.(7)017E7

RDATA2

51.

(7)019G6

HEAD

3

54.(7)017H7

RDATA7

57.(7)

RNOISE

69.

(3) 04R8

RD

63.

(5) 029

+5R

66.(5)

GND

69.(5)019T14_P2AS

72.(5)019T2

P1B1

(A0)

CIPHER

DATA

PRODUCTS

TEST

POINTS

TP

SH

LOC

NAME

1.(5)

GND

4.(8)U11C3

CLR

7.

(8) 011B11

CLR

I9.(8)012E3

DCLK

2

13.(4)03-04

SMDH

16.(4)03A4

TIDR

19.

(4)

03EI0

VS

22.

(4)03Al9

TIDR

25.

(4)03DI0

SIDR

28.

(8)013F9

CHDROP

2

31.(8)013B9

CHDROP

6

31.(8)013C7

CHDROP

4

37.(5)

GND

49~(7)017A7

RDATA4

43.(7)019C6

HEAD

9

46.(7)017D7

RDATAl

49.(7)019F6

HEAD

P

52.(7)017G7

RDATA3

55.(7)019I6

HEAD

5

58.

(5)03LI9

RES·

61.(4)05

V29M

64.

(5)029N10

VIN

2

67.

(5)018T6

LOAD/CLR

79~(5)U19T1

p1B9 (B9)

73.(5)018Rl0

ET/EP

TP

SH

LOC

NAME

2.(8)U11F6

CLR

5.

(8}012E11

CLR

8.

(8)

U11B3

CLR

II.(8)011E11

CLR

14.(4)01-Q2

TMDH

1 7 • (

4)

U3

E3

VT

29.(4)U5E12

VOUTI

23

• (4) 03

E4

IT

26.

(5)

GND

29.(8)UI3F7

CHDROP

3

32.(8)UI3E7

CHDROP

1

35.(8)013B7

CHDROP

7

38.(5)

GND

41.

(7)U19B6

HEAD

6

44.(7)U17C7

RDATAS

47.(7)019E6

HEAD

2

59.(7)017F7

53

• (7) 019H6

56

• (7) U17I7

59.

(5)

RDATAP

HEAD

7

RDATA5

GND

62.(2)U8R4

CLK8M

65.

(5)

U29N12

P4-29

.

68.(5)U29N3

P4-6

71.(5)019T13

P2A1

74.(5)039

HUB

LOCK

75.(5)040

DOOR

LOCK

76.(5)

GND

77.

(3)03V4

P9ARDY

'-\-5\

~Tna~~

n~m~

n~~n"~~

~~.U~~

~n~n .~v~uv~~

m"

~m

TV"\

T'Tm~

~J;!Q~

.rV~:L"~';;'

TP

SH

LOC

NAME

TP

SH

LOC

NAME

TP

SH

LOC

NAME

78.

(3)

07V5

ILDP

79.

(3)

06V2

W21

89.

(3)

06V12

ONLSEL

81.

(3)

02V6

IONL

82.

(3)

07V7

IRDY

83.

(3)

07Vl2

IFPT

84.

(3)

07VlS

IFBY

85.

(3)

07V2

IEOT

86.

(3)

07V15

IDBSY

87

•

(3)

OlSVa

IRWD

88.

(5)

GND

89.(5)07

+5V

9S.

(5)VRl

-12V

91 •

(5)

GND

92.

(5)

VR2

+12V

93.

(9)

09F8

PECLK

94.

(7)

Rl15

VOOTB

95.(

)CHASSIS

GND

'-\-5').....

PLUG

NUMBERING

CIPHER

PLUG

1

PLUG

2

PIN i

SIGNAL

NAME

t

SIGNAL

NAME

1

*NOTE

1

IRDP

2

I;FBY

2

IRD9

3 3 IRDl

4

lLWD

4 lLDP

6

lW4

6

lRD4

8

lGO

8

IRD7

19

IWS

19

IRD6

12

IWl

12

lHER

14

RESERVED

14

lFMK

16

RESERVED

16

lDENT

18

IREV

18

lPEN

2S

IREW

2S

IRD5

22

lWP

22

IEOT

24

lW7

24

IRW

26

lW3

26

28

lW6

28

IROY

39

lW2

39

IRWD

32

IW5

32 lPPT

34

lWRT

34

IRSTR

36 36

IWSTR

38 lEDlT 38

lDBSY

49

lERASE

49

lONL

42

lWFM

42

lCER

44

BLANK

44

46

lTADO

46

lTADI

48

IRD2

48

I

FAD

59

IRD3

59

lHlSP

'-\

-53:-

*NOTE

Odd

numbered

pins

are

ground

unless

specified

otherwise.

PLUG

3

PLUG

4

PIN i

·SIGNAL

NAME

i

SIGNAL

NAME

1

GNDRTN

1

FPT

RING

SENSOR

2

-20VDC

2

FPT

RING

SENSOR

(+5)

3

GNDRTN

3

OPTICAL

TACH

4 +29vnC 4

OPTICAL

TACH

(+5)

5

GND

RTN

5

GND

6

+9VDC

6

SERVO

POSITION

(1)

7

GND

RTN

7

FPT

RING

SENSOR

8

VDC

(V3OM)

8

OPTICAL

TACH

9

GND

RTN

9

TAPE

IN

PATH

SENSOR

10

VDC

(V39P) IS

OPTICAL

TACH

11 11

TAPE

IN

PATH

SENSOR

12

7VAC

12

TAPE

IN

PATH

SENSOR

(+5)

13

LOCK

20

13

DOOR

SENSE

14

DOORLOCK

14 .

DOOR

SENSE

15

HUB

LOCK

15

BOT

EaT

SENSOR

( +5)

16

BOT

EOR

SENSOR

17

BOT

EaT

SENSOR

(VINe)

18

BOT

EaT

SENSOR

(VIN1)

19

GND

2e

SERVO

POSITION

(1)

21

GND

22

GND

PLUG

5

PLUG

6

PIN i

SIGNAL

NAME

i

SIGNAL

NAME

1

TO

SSR

BLOWER

CONTROL

1

WHEADCT

2 " " 2

CHAN

4

3

TOMB

3

CHAN

4

SUML

4

CHAN

6

5

TOML

5

CHAN

6

50MB

6

CHAN

9

7

GND

7

CHAN

9

8

TACTILE

SWITCHES

8

CHAN

1

9 • • 9

CHAN

1

19 • •

18

CHAN

2

11 • • 11

CHAN

2

12

• • 12

CHAN

P

13 • " 13

CHAN

P

14 • • 14

CHAN

3

15 • • 15

CHAN

3

16 " • 16

CHAN

7

17 • " 17

CHAN

7

18

+5V

18

CHAN

5

19 19

CHAN

5

29

WHEADCT

21

ERASE

RTN

(GND)

22

ERASE

DRV

23

24

25

L\-SS

PLUG

7

#

SIGNAL

NAME

1 RP

HEAD

4

2

GND

3

RP

HEAD

6

4

RM

HEAD

4

5

RP

BEAD

9

6

RM

HEAD

6

7

RP

HEAP 1

8

RM

HEAD

9

RP

BEAD 2

19

RM

HEAD

1

11

RP

HEAD

P

12

RM

HEAD

2

13

RP

HEAD

3

14

RM

BEAD P

15

RP

BEAD 7

16

RM

HEAD

3

17

RP

HEAD

5

18

RM

HEAD

7

19

GND

4

-sf2=,

~rfti~R_QAIA_£EQQU~IS

E5.§.aQ_MISll_~Aa

A.

Refer

to

section

3

in

Cipher

Technical

Manual

for

exercising

the

following

Diagnostic

routines

with

Tape

Unloaded.

i.NQI~i._!l_gi.22Ql~§_S~rYi.Q~_A1Jil

1.

Defeat

Interlocks

with

Service

Aid 33

(4-5-1=}-5)

2.

Exercise

Service

Aid

11

(4-5-1=1-5)

while

refering

to

Statement

Numbers

beginning

with

S£1000 -

p.

3-20.

Exercise

Service

Aid 12

(4-5-1:2-5)

and

Service

Aid

13

(4-5-1=.3.=-5)

while

refering

to

Statement

I":umber

beginning

with

WR1000

-

p.

3-28.

Exercise

Servic.e

Aid 14

(4-5-1:!l-5)

while

referinb

to

Statement

Numbers

beginning

with

TA1000 -

p.

3-31.

Exercise

Service

Aid

21

(4-5-2:1-5)

while

refering

to

Statement

Numbers

beginning

with

TI1000

-

p.

3-34.

6.

Exercise

Service

Aid 22

(4-5-2:2-5)

and

Service

Aid

23

(4-5-2=.3.-5)

while

refering

to

Statement

Numbers

beginning

with

BE1000 -

p.

3-37.

1.

Exercise

Service

Aid 24

(4-5-2:!l-5)

while

refering

to

Statement

Numbers

beginning

with

CA1000

-

p.

3-38.

8.

Exercise

Service

Aid

31

(4-5-3.:1-5)

while

refering

to

Statement

Numbers

beginning

with

HS1000 -

p.

3-40.

9.

Exercise

Service

Aid 32

(4-5-3.:2-5)

while

refering

to

Statement

Numbers

beginning

with

HD1000

-

p.

3-43.

X

Exercise

Service

Aid.33

(4-5-3.:3.-5)

while

refering

to

Statement

Numbers

beginning

with

LD1000

...

p •

3-18"

11.

Exercise

Service

Aid 34

(4-5-3.:~-5)

while

refering

to

Statement

Numbers

beginnin&

with

BL1000 -

p.

3-44.

B. The

following

Diagnostics

are

run

with

Tape

Loaded.

1.

Exercise

Service

Aid

11

(4-5-1:1-5)

Probably

used

with

contoller

generated

commands.

2.

Exercise

Service

Aid 12

(4-5-1:2-5)

to

disable

Service

Aid

ii.

3.

Exercise

Service

Aid

13

(4-5-1:l-5)

Probably

used

~ith

contoller

generated

commands.

G-

\

~lftl£R_QAIA_LA~

~QNllttUEQ

4.

Exercise

Service

Aid 14

(4-5-1~~-5)

to

disable

Service

Aid

13.

5.

Exercise

Service

Aid 22

(4-5-2=2-5)

(Does

this

enable

100 IPS mode?)

3.

Exercise

Service

Aid 23

(4-5-2=.3-5)

while

refering

to

Statement

Numbers

beginniflg

with

RF1000 -

p.

3-48.

This

also

enables

25

IPS

mode.

c.

Adjustments

1.

Exercise

Service

Aid

21

(4-5-2=1-5)

while

refering

to

paragraph

4-12

on

p.

4.PJ

Read

Threshola

Adjustment

..

2.

Supply

Hub

-

p.

4-ff·

t9

3.

Takeup

Hub

-

p.

4-'lj/.~1

4.

Compliance

Arm

-

p.

4-28.

5.

Takeup Motor -Note

what

is

required

to

replace

-

p.

4-3ge

6.

Head

Azimuth

-

p.

4-'f1'.

5~l-

ATP

OPEaATING-INSTRUCTIONS

STAPE

8307ii

STAPE

tests

the

IOU-49

STREAMING

TAPE

DRIVE

CONTROLLER.

SUBJECT

DEVICE

: IOU-49

RON-version:

-

CONTROLLER

Board-ver.

ROM-version:

-

SYSTEN

REQUIRED

CPU-type

Q29Q64

Min. memory:

32K

bytes

This

program

tests

the

IOU-49

streaming

tape

drive

controller.

One

or

more

Cipher

tape

drives

may

be

configured

for

this

test,

each

with

its

own

IOU-49.

Load

the

program

using

the

standard

ATP

loading

procedure,

with

the

name STAPE.

The

program

will

ask

for

the

devices

to

be

tested.

Each

device

will

be

checked

to

verify

that

it

is

an IOU-49

and

is

operational.

The IOU-49 rom

date

and

version

will

be

displayed

for

each

device

entered.

question

"SINGLE

TEST

1"

~ill

be

asked.

Answer

using

Flag

2

(yes)

or

Flag

3

(no).

If

the

selection

is

yes,

the

following

list

will

be

displayed:

UNL

END

PRE

PH1

.

PH2

PH3

TEST

BLOCK

NAMES

ARE:

WRITE

PROTECT

AND

UNLOAD

TEST

END

OF

TAPE

TEST

PRELIMINARY

FUNCTIONAL

TEST

WRITE

ENTIRE

TAPE

TEST

READ

ENTIRE

TAPE

TEST

STREAMING

TEST

(NANUAL)

(r~ANUAL

)

(AUTO)

Enter

the

desired

test

name

and

the

program

will

continue.

If

the

single

test

option

is

not

selected

the

program

will

execute

all

the

automatic

tests

in

order.

tee

iteration

count.

This

is

the

number

of

ti~es

the

test

will

be

executed

for

each

controller.

Specify

whether

to

halt

after

an

error

by

answering

"yes"

or

"no"

(f2

or

f3)

to

the

question

"HALT

AFTER

ERROR".

The

program

will

now

ask

"OUTPUT

DEVICE:".

Enter

a

valid

printer

address

to

record

test

names,

iteration

counts

and

.o

....

"""'n

....

n,oc.o~~r-:a~

-.~

i-Ir-\~."

",..""'1',,..

'T'l.-,r\.

.....

~

...

..,.

•

..;

""",-1

..

.,.;"

.......

1

~'"

,..;;;

c.-.

.......

1

""''11

...

, • ..."

...

,,;,wwQC";;W

Qw

",uO;;;J

v'"''''''''',.

.LLlo;;;

"'0;;;'

lU~1JQ..L.

VII.J...L..J.

Q,LwV

"".J.W}J.J.QJ

this

information.

-STAPE 830720

7-

1

S

TAP

E .83071 1

ATP

OPERATING-INSTRUCTIONS

Finally

a

"TEST

MESSAGE"

may

be

recorded

on

tte

printer

at

the

beginning

of

the

test

(as

well

as

the

control

line

of

a

VT3). Answer

"yes",

as

before,

to

allow

entry

of

this

message.

A

description

of

all

the

tests

follows,

first

the

MANUAL

tests

(executed

only

by

specifing

"SINGLE

TEST"),

and

then

the

AUTOMATIC

section

will

be

described.

A.

MANUAL

SECTION

1.

WRITE

PROTECT

AND

UNLOAD

TEST

a.

A

write

is

attempted

with

the

tape

write

protected,

this

causes

an

automatic

unload.

b.

The

tape

is

manually

reloaded

with

a

write

ring.

c.

An

Unload

command

is

executed.

d.

The

tape

is

manually

reloaded.

2.

END

OF

TAPE

TEST

a.

Maximum

length

blocks

are

written

to

the

end

of

tape

mark.

The

total

block

count

is

displayed.

This

also

serves

as

a

test

of

overall

tape

quality.

B.

AUTOMATIC

SECTION

1.

PRELIMINARY

TEST

a.

Write

10

maximun

length

blocks

of

channel-test

data

in

IPL mode.

Channel

test

data

consists

of

the

following

26

byte

pattern:

$0102040810204080COEOFOF8FC

FEFDFBF7EFDFBF7F3F1FOF0703

b.

Rewind,

read

and

verify

each

block

in

IPL mode.

c.

Rewind and do a Read Check

of

each

block.

d.

Backspace

and

Erase

the

10th

block.

e.

Backspace

and

rewrite

the

10th

block

and 2 end

of

file

marks.

f.

Rewind and

search

for

2

file

marks.

g.

Rewind,

read

and

verify

each

block

in

IPL wode.

h.

Rewind

and

write

10

maximum

length

blocks

of

worst-case

data

in

Buffer

mode

(with

interrupts

enabled).

Worst-case

data

is

the

pattern

$B6DB6D.

i.

Rewind,

read

and

verify

each

block

in

Buffer

mode

(~ith

interrupts

enabled).

j.

Rewind,

Stream

write

10

maximum

length

blocks

of

worst-case

data.

k.

Do

a

reverse

backup

check.

1.

Do

a

forward

backup

check.

m.

Repeat

the

above

sequence

at

50ips

and

then

at

100ips,

(the

first

sequence

is

at

25ips).

-STAPE 830720

7-2

ATP

OPERATING-INSTRUCTIONS

SlAPE

830711

2.

PHASE

1 - IPL

MODE

WRITE

a.

Write

incremental

block

lengths.

Each

block

1

byte

greater

than

the

preceding.

The

data

pattern

is

increased

by 1

each

block,

from

all

$OO's

to

all

FF's.

b.

Write

26

blocks

of

increasing

length,

each

block

more

than

the

last

by

the

amount

of

the

in

the

26

byte

channel

test

pattern

(previous

page).

The

last

block

written

is

the

maximum

length

of

16k

($4000).

The

data

pattern

is

the

channel

test

pattern

repeated.

c.

Write

decremental

block

lengths

to

the

end

of

tape

mark.

Data

written

is

the

worst-case

pattern,

$B6DB6D,

repeated.

3.

PHASE

2 - IPL

MODE

READ

a.

Data

written

in

Phase

1

are

read

back

and

verified.

3.

PHASE

3 -

STREAM

MODE

WRITE

ao

Write

512

maximum

length

blocks

of

worst-case

data.

b.

Do

a

reverse

backup

check.

At

the

end

of

the

test

sequence

the

iteration

count

is

incremented

and

displayed

along

with

the

number

of

the

device

just

tested.

When

the

count

entered

at

the

start

of

the

test

is

reached,

and

the

last

device

has

been

tested,

the

test

is

complete.

Errors

are

reported

either

by a

simple

message,

in

the

case

of

a

data

miscompare

or

timeout

of

some

kind,

or

by

the

display

of

the

controller's

Read

Id

bytes,

with

their

interpretation,

in

the

case

of

a

status

error.

Examples

are

shown

on

the

-STAPE

830720

7-3

STAPE

830711

ATP

OPERATING-INSTRUCTIOnS

Examples:

ERROR

/101

INCORRECT

READ

DATA

ERROR

#02 TST:PRE

NODE:IPL STO:84

TAPE

INOPERABLE

ITR:Ol

BLK:OOOl

CTL:20 SPD:025

EXT

15:80

16':00

17:00

18:00

19:00

In

the

first

example,

above,

no

status

error

has

occurred,

but

the

data

read

back

from

the

tape

did

not

agree

with

what

was

written.

The

second

example

is

an

error

reportea

by

the

controller.

The

fields

displayed

are

as

follows:

1.

Error

number.

2.

Test

Block

in

progress.

3.

Test

iteration

number.

4.

Last

block

written

or

read.

5.

Last

control

command

sent

to

controller.

6.

The

current

speed

in

inches

per

second.

7.

The mode

of

operation

(Ipl,

Buffer

or

Streaming).

8.

Status

o.

9.

External

status

bytes.

10.

A

message

(or

messages)

derived

from

the

external

status

bytes.

All

errors

are

numbered and a

device

is

aborted

should

the

limit

of

9

errors

be

reached

in

anyone

test

sequence.

After

an

error,

the

test

in

which

it

occured

is

restarted

from

the

beginning.

The

first

line

of

the

terminal's

screen

indicates

program

information

as

follows:

1.

The

block

number

of

the

current

read

or

write.

2.

The

address

of

the

device

being

tested.

3.

The name

of

the

test

block

being

run.

4.

The number

of

the

test

iteration

with

the

count

entered

at

the

beginning

of

the

test

-

seperated

by a

slash.

5.

An

"h"

in

the

right

corner,

if

the

halt

on

error

option

was

selected.

Example:

BLK=1234

ADR=4

TST=PRE

ITR=02/04h

-STAPE 830720

7-

Y

Cipher_Tape Cipher Tape

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