Archive_SC 499_Tape_Controller_Information_Guide Archive SC 499 Tape Controller Information Guide

Archive

FasTape

and

Scorpion

tape

drives).

Operation

with

4

or

9

track

drives

is

jumper-selectable.

The

tape

controller

consists

of

a

single

printed

circuit

which

plugs

directly

into

the

PC

expansion

board.

Two

interface

connectors

on

the

controller

board

provide

the

of

mounting

the

tape

drive

internally

or

externally

to

the

System

Unit.

board

drive

option

IBM

PC

The

following

paragraphs

provide

the

SC-499

unpacking

and

handling

instructions,

jumper-selectable

options,

installation

instructions,

and

interface

information.

1.2

HANDLING

Industry

standard

procedures

for

the

handling

of

electronic

equipment

are

sufficient

for

handling

the

SC-499.

The

user

should

ensure

that

the

board

and

its

components

are

not

subjected

to

physical

shock

or

damage,

and

to

excessive

handling

which

may

cause

component

damage

from

electrostatic

discharge

(ESD).

1

""

..

'

....

1 2

03;;:

..

~

I ' ( F I (

()JI]!

,

'F

I

~

...

c:::::»

... c::::;)

-[-J

I ,

~

I ( I I (

en

•

...

c:::::I

eM

..E3

! i

,..

[-lO

t:jp-

leD

I (

II]

.J

: I

r-

I!!::t

' ...

c:::::I

I It a

L-

..

,C)

9 • .uec:J 0 U •

~----'

I

=rr:

.

I I ( C I (

c::::J

- - - L f

.t::J..

~

:

I

.n

......a.

0r-

,-..,

...-..,

D

...

-.,

...

--

..

r-------.. I

I

..

c:J

P

...

~

l:::I."

,.

•

!..-.!

--

....

'

,,-----'.

t I : 8

.'

~

r--l='

IDE!

:

()!

tf.: '

l:j

p....It';

......

;

......

)

c:'

:::::::)::)

J:=:'

W . :

= L l

...

c:::::»."

~5·'--1

(-0,

( '-=-::3-"'---" I :

[-~

I

il = a

A,

,".

~

e,C!J

E3::t

I::3t'

11ft'

'...

~

!'

_ ............. .

•

cr

2 = 8 !

E3

::.'

t::t

~'ia

68

c!,"

e t:J

~:,.'

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

'

10

~,

1~.

I

.....

~~

"---:.---=-----~~----------=-:------.,

.

.--.

--

-

--

-

..,

..

-

...I==I~'"

"-"'

__

3'

...

--~{

....---.-.

::.

e

.I~

__

-.

__

"'!'"'!'-~I

,

J3

11 - ,

10

• •

• -

c:."

c:::I

..

Figure

1.1

SC-499 Tape

Controller

PCB

Assembly

1.3

UNPACKING

AND

INSPECTION

The

SC-499

has

been

packaged

for

maximum

protection

from

shipping

damage.

still,

an

inspection

of

the

board

and

components

should

be

performed

upon

receipt

to

assure

that

no

damage

has

occured.

If

damage

is

detected

notify

the

manufacturer

and

the

common

carrier

immediately.

If

practical,

save

all

containers

and

packing

materials

for

reshipment

or

storage.

1.4

JUMPER-SELECTABLE

OPTIONS

The

jumper-selectable

options

given

in

Table

1-1

are

available

on

the

SC-499.

TABLE

1-1.

DESCRIPTION

Tape

format

Tape

Speed

Number

of

Tracks

Power-On

Confidence

Test

I/O

Register

Base

Address··

DMA

Priority

Level

(Select

one

pair)

Interrupt

Priority

JUMPER-SELECTABLE

OPTIONS

JUMPER

LOCATION

CC

DD

y

KK

A3

thru

A9

DRQ1,

DACK1

DRQ2,

DACK2

DRQ3,

DACK3

IRQ2

IRQ3

IRQ4

IRQ5

IRQ6

IRQ7

OPTION

IN =

QIC-24·

OUT

= QIC-11

OUT

(90IPS)·

For

Archive

use

'only

IN = 9

Tracks

OUT

= 4

Tracks

IN =

Test

at

Power-ON

or

Reset

OUT

=

Test

Disabled

IN

=

Address

Bit

TRUE

OUT

=

Address

Bit

FALSE

NOTE:

Base

Address

is

selectable

from

0

to

3FB

HEX

on

B-byte

boundaries.

Both

IN

=

Priority

Level

Both

IN =

Priority

Level

Doth

IN

=

Priority

Level

IN =

Priority

Level

2.

IN =

Priority

Level

3

IN =

Priority

Level

4

IN

=

Priority

Level

5

IN =

Priority

Level

6

IN

=

Priority

Level

7

1·

2

3

Loop

on

Error

Maintenance

FF

OUT·

(For

Archive

use

only)

Test

Configuration

No

Description

C

HH

NN,

•

As-shipped

configuration

OUT·

(For

Archive

OUT·

(For

Archive

RR

OUT·

(For

Archive

••

As-shipped

configuration

=

A9

Jumper

IN

(200

HEX).

use

only)

use

only)

use

only)

15.

JUMPER

CONFIGURATION

The

tape

oontroller

jumpers

are

installed

at

the

faotory

and

the

110

board

oonneotors

are

shown

in

Figure

1-2.

NOTE:

Jumper

location

Y

is

open

on

the

4-track

oontroller.

1.5.1

Contention

The

as-shipped

oonfiguration

(Base

Address

=

200

HEX,

DMA

Channel

=

1,

Interrupt

Priority

=

2)

of

the

SC-499

provides

contentionless

operation

for

the

majority

of

the

system

users,

though

a

oontention

problem

can

arise

between

the

tape

oontroller

and

certain

other

options

if

both

are

installed.

___________

~

NOTE:

Be

advised

that

most

IBM

PC

models

use

DMA

Channel

2 f r ?

the

floppy

disk

drive

and

DMA

Channel

3

for

the

hard

disk

drive.

However,

the

AT

does

not

use

DMA

Channel

3

for

the

hard

disk

drive.

It

is

handled

through

110.

4

e

~~~'

CONNECTOR

....

1

110

'OR

'''TI''NALLY-LOCATID

TAP.

D"'YI

DIAGNOITIC

INDIC

ATORe

1 2

OU

3~

4

~

:::=::::<

F «

lWJi

---.C,

I

;

...

«:::)

.1.

c::::)

-[-J

I (

~

I « I I «

.tt

•

••

t.

c:::J c

..

..9

!

"..

[-10

Cjf'''

I 1 D I

<a(]....:

c!:I

• ...

t::2

:

~

a

...

c:::::)

D ,

"..

0 U •

•

c::3

r.-_~(

I

c:::::=:;)

I .. , -.... c c. « r::::J

--

il

..

c::t

p

...."

a.c.Dr-,.c=='

~_.....a

tl

: 8

.'

tE

~

Q'

10

E:s

:1J5

c;;.'

:.

I (

...

-

••

, •

_'"

- -

.,.

c,

,-=1

A

I

:~

AI 2 «

~:::~!~UH3~

•

CO""ICTO"

.I,

.1

IY8'T'IM

110

..

UMP.R

LOCAT.O".

CONNICTOR

....

1

110

·'0"

IXTI"NALLY-LOCATID

TAP.

0'''.1

Figure

1.2

SC-499

Jumpers,

indicator,

and

connector

locations

1.6

ELECTRICAL SIGNAL DESCRIPTION

All

voltage

measurements

are

taken

at

the

controller

connector

(J2

or

J3)

with

terminators

installed.

Standard

TTL

levels

are

used

on

signal

lines

to

the

drive

as

follows:

FALSE -

Logic

0 (HIGH) =

2.4

to

5.25

VDC

TRUE

-

Logic

1

(LOW)

=

0.0

to

0.55

VDC

Standard

TTL

levels

are

required

on

signal

lines

to

the

controller

as

follows:

FALSE -

Logic

0 (HIGH) =

2.0

to

5.25

VDC

TRUE

-

Logic

1

(LOW)

=

0.0

to

0.80

VDC

6

1.7

INTERFACE

CONNECTIONS

The SC-499

assignments

and

signal

descriptions

for

the

IBM

PC

bus

interface

connector,

J1,

are

listed

in

Table

1-2.

Table

1-3

lists

assignments

and

signal

descriptions

for

both

drive-interface

connectors,

J2

and

J3.

At

the

external

interface

connector

J2,

pins

3,

4.

8.

15

and

19

are

signal

returns

connected

to

Signal

ground

at

the

controller.

The

cable

shield

connects

to

the

connector

housing

only.

At

the

internal

interface

connector

J3,

all

odd-numbered

pins

are

signal

returns

connected

to

Signal

ground

at

the

drive

TABLE

1-2

CONNECTOR

J1 PIN

ASSIGNMENTSISIGNAL

DESCRIPTION

A02

A03

A04

A05

A06

A07

A08

A09

A12

THRU

A31

B02

B18

B06

B16

B17

B26

B15

B13

B14

B25

B24

B23

B22

B21

B27

B30

NAME

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DBO

A19

THRU

AOO

RESET

DRV

DR~1

)R'2

IRI3

IIACK1

IIACK2

IJACK3

IIIW

IIIR

IRt3

IRt4

IRt5

IRt6

IRt7

TIC

eSC

DESCRIPTION

DATA

BUS

BIT 7

DATA

BUS

BIT 6

DATA

BUS

BIT 5

DATA

BUS

BIT 4

DATA

BUS

BIT 3

DATA

BUS

BIT 2

DATA

BUS

BIT 1

DATA

BUS

BIT 0

SYSTEM

ADDRESS

BUS

RESET

DRIVE

DMA

REQUEST

Priority

Level

1

DMA

REQUEST

Priority

Level

2

DMA

REQUEST

Priority

Level

3

DMA

ACKNOWLEDGE

Priority

Level

1

DMA

ACKNOWLEDGE

Priority

Level

2

DMA

ACKNOWLEDGE

Priority

Level

3

1/0

WRITE

1/0

READ

INTERRUPT

REQUEST

INTERRUPT

REQUEST

INTERRUPT

REQUEST

INTERRUPT

REQUEST

INTERRUPT

REQUEST

TERMINAL

COUNT

Priority

Level

3

Level

4

Level

5

Level

6

Level

7

OSCILLATOR

(14.31818

MHz

Clock)

7

TABLE

1-3

CONNECTOR

J2/J3

PIN ASSIGNMENTS/SIGNAL DESCRIPTIONS

J2

J3

13

02

25

04

12 06

24 08

11

10

23 12

10 14

22 22

09 24

21

26

20

28

07

30

06 34

18 36

05

38

17

40

16

42

02

46

14 48

01

50

NAME

GO-

REV-

TR3-

TR2-

TR1-

TRO-

RST-

DSO-

HC-

RDP-

UTH-

LTH-

CIN-

USF-

TCH-

WDA-

WDA+

HSD-

WEN-

EEN-

.C

=

Controller

D =

Drive

TO*

D

c

C

D

DESCRIPTION

GO.

Motion

Control

for

capstan

servo.

REVERSE.

Direction

control

for

capstan

servo.

TRACK

SELECT

Bit

3 (MSB).

TRACK

SELECT

Bit

2.

TRACK

SELECT

Bit

1.

TRACK

SELECT

Bit

0

(LSB).

RESET.

Cause

drive

to

perform

initialization

and

head

recalibration.

DRIVE

SELECT

HIGH

CURRENT.

Enables

operation

with

alternate

tape

type

(DC600A).

READ

DATA

PULSE.

Read

data

is

present

at

the

drive

interface.

UPPER

TAPE

HOLE.

LOWER

TAPE

HOLE.

CARTRIDGE

IN.

Tape

cartridge

in

place.

UNSAFE.

Safe

plug

on

cartridge

is

in

the

unsafe

position,

i.e.

writing

is

enabled.

TACHOMETER.

Capstan

tachometer

pulses.

WRITE

DATA.

Inverse

of

WRITE

DATA

signal.

HIGH

SPEED

DRIVE.

Tape

speed

= 90

ips.

WRITE

ENABLE.

ERASE

ENABLE.

8

1.8

INSTALLATION

1

("-

/

The SC-499

fits

and

functions

in

at

y

expansion

slot

in

the

IBM

PC

System

Unit

except

slots

7

and

8.

Power

requirements

from

the

System

Unit

are

given

in

Table

1-4.

TABLE

1-4.

SC-499

POWER

REQUIREMENTS

~OLTAGE

CURRENT

MAXIMUM

RIPPLE

~5V+/-5'

including

1.0A

(typ)

100

mv

ripple

1.25A

(max)

~12+/-5'

including

65ma

(typ)

500

mv

to

10KHz;

~ipple

125ma (max)

200

mv

beyond

10KHz

To

install

controller:

1.

Set

all

external

power

switches

to

OFF,

and

unplug

the

external

power

cord(s)

from

their

power

source.

NOTE

Steps

2

thru

7

are

for

mounting

the

SC-499

in

a

System

Unit

expansion

slot.

2.

Disconnect

any

interface

cabling

which

may

obstruct

cover

removal.

Remove

the

System

Unit

cover

(Figure

1-3)

to

gain

access

to

the

interior

(see

Figure

1-4).

3.

Connect

the

tape

drive

interface

cable

to

controller

connector

J3

(see

Figure

1-2),

which

is

a

50-pin

(male)

header

connector.

Figure

1.3

PC

Cover Removal

9

FIGURE

1-4.

PC

Expansion

Slots

4.

Choose

any

available

expansion

slot

(except

1

and

8)

and

remove

the

cover

plate

from

the

rear

panel

access

to

that

slot.

Save

the

retaining

screw

and

cover.

CAUTION

The

tape

controller

PCB

may

be

shorted

to

the

IBM

PC

system

speaker

if

the

controller

is

used

in

expansion

slot

1.

5.

Carefully,

but

firmly,

press

the

controller

board

into

the

slot.

6.

Align

the

hole

in

the

board's

retaining

bracket

with

the

hole

in

the

System

Unit

rear

panel,

and

replace

the

retaining

screw.

1.

Replace

the

System

Unit

cover

and

reconnect

all

cables.

8.

If

the

tape

drive

is

mounted

outside

of

the

System

Unit,

connect

the

tape

drive

interface

cable

to

controller

connector

J2

(see

Figure

1-2),

which

is

a

25-pin

(female)

D-type,

subminiature

connector.

J2

is

accessible

from

the

System

Unit

rear

panel.

NOTE:

Interface

cable

length

should

not

exceed

12

inches

(1.8

meters).

9.

Installation

is

now

complete

and

power

may

be

restored.

10

1.8.1

Power-On

Confidence

(POC)

Test

A

POC

test

occurs

automatically

when

power

is

applied

or

when a

reset

command

is

issued.

This

test

includes

sub-tests

of

the

following:

-Microprocessor

internal

RAM

and

basic

instructions

-LSI

controller

operation

-16K

RAM

IC

-Data

separator

logic

(discrete)

~Successful

completion

of

the

above

tests

are

reported

to

the

by

the

assertion

of

EXC-within

five

seconds.

If

EXC-

is

asserted

within

this

time

a

failure

is

indicated.

host

_._!

0'(\

\

not

hJ.

~;..

j~

• '

- \ \,,(,'\fC{

Each

logic

group

except

the

microprocessor

has

an

associated

diagnostic

indicator

as

follows:

-DS1-LS1

controller

chip

-DS2-16K

RAM

buffer

logic

-DS4,DS5 -

not

used

LED

~~

Successful

completion

of

all

tests

is

indicated

by a

single

blink

of

all

five

LED's

following

the

off

period

during

which

the

tests

are

performed.

Each

time

a

test

fails

the

associated

LED

blinks

and

the

test

is

repeated;

hence,

a

blinking

indicator

is

a

visual

indication

of

the

area

of

failure.

If

the

microprooessor

fails

the

results

are

unpredictable.

1 1

1

\

1.9

I/O

STRUCTIRE

The

SC-499

is

fully

oompatible

with

the

IBM

PC

I/O

structure.

The

I/O

registers

ocouPY

eight

adjaoent

locations

in

the

IBM

PC

I/O

address

map.

Only

four

of

the

address

locations

are

used

by

the

SC-499.

NOTE:

Jumper-seleotable

BASE

ADDRESS

is

factory-set

at

200

HEX.

1.

,BASE

.'DDRESS

+0

(200

HEX):

\ N

Ql<"f~\C--~W~.-

...

--_

....

_

....

-,,-.-

.~-

Data/Command

Register~

(Read

or

Write).

..,

~~

BAS,

ADDRESS

+1

(201 HEX):

Control

Register

(Write

Only).

Status

~egister

(Read

Only).

CONTROL

REGISTER

DESCRIPTION

(Wri

te)

on

~

VJf<t,

{''I

(\

0\\"'1

BIT 7

BIT 6

BIT 5

BIT 4

(BITS

0-3

Not

Used)

f"'"

Reset

controller

microprocessor~

Request

to

LSI

chip

Enables

interrupts

lEN =

0,

masks

interrupts

, /

Enables

DONE

interrupt

DNIEN

=

0,

masks

DONE

interrupt.

STATUS

REGISTER

DESCRIPTION

(Read)

-

C)\"'}~

a"

,

Interrupt

Request

Flag.

OR~ng

of

RDY

AND

EXC,

and

DONE

if

DNIEN

is

set.

Ready,

from

LSI

ohip.

-

Exception,

from

LSI

chip.

Done,

from

DMA

10giQ.

Direction,

indicates

direction

of

bus

is

from

controller

to

IBM.

PC.

3.

BASE

ADDRESS

+2

(202

HEX):

Start

DMA

(DMAGO).

Any

write

to

this

register

will

cause

DMAGO

to

be

active.

4.

BASE

ADDRESS

+3

(203

HEX):

Reset

DMA

(BSTDMA).

Any

write

to

this

register

will

cause

RSTDMA

to

be

active.

1.10

INTERRUPTS

The

SC-499

interrupt

priority

level

is

jumper-selectable

(see

Table

1-1).

Each

interrupt

source

bit,

RDY,

EXC,

and

DONE

(see

Status

Register

Description),

can

be

read

through

the

Status

Register

regardless

of

the

state

of

the

interrupt

masks:

lEN =

0,

DNIEN

=

0,

(see

Control

Register

Description).

The

IRQ

line,

is

tri-stated

when lEN

is

cleared.

This-~llows

other

IBM

PC

options

the

use

of

that

interrupt

line

when

the

tape

controller

is

not

using

it.

Therefore,

the

IBM

PC

8259

interrupt

controller

should

be

programmed

to

respond

to

the

tape

oontro11er's

IRQF

only

after

IRQ

has

been

enabled

by

setting

lEN.

12

1.11

DMA

The

tape

oontroller

uses

the

IBM

PC

8237

DMA

oontroller

transfer

data

to

and

from

the

IBM

PC

main

memory. The

ohannel

is

also

jumper-seleotable

(see

Table

1-1).

The

tape-oontroller

DMA

logic

can

be

initialized

by

writing

address

location

BASE+3

(RSTDMA).

RSTDMA

initializes

the

sequencer,

clears

all

Control

Register

bits

to

0,

and

sets

to

1

(power-on

reset

from

the

IBM

PC

performs

the

funotions).

The

following

sequence

may

be

used

to

start

transfer:

'

1 •

2.

3.

r

Issue

a

transfer

command

to

the

tape

controller.

Set

up

the

8237

DMA

controller's

register

(but

~

leave

the

mast

bit

set).

"~

Write

(any

value)

to

the

tape

oontroller

register

at

BASE

ADDRESS+2

(DMAGO).

to

DMA

to

DMA

DONE

same

DMA

\

(j.

~\

A

~4.

b\O

.'Q5V

\.V

5.

I

Clear

the

mask

bit

in

the

8237

DMA

oontroller.

11

,~~,

Repeat

above

from

step

2

for

each

subsequent

block.

ry("

l\

/'

"",;

\

r:J:7

1 • 12

RESETS

Four

reset

Signals

(two

DMA

resets,

and two

mioroprocessor/tape

drive

resets)

are

available

on

the

SC-499.

1.

DMA

Resets:

•

RSTDMA.

(RSTDMA

is

discussed

in

the

DMA

paragraph

above).

•

RESET

DRV.

This

is

the

power-on

reset

from

the

IBM

PC

power

supply,

and

performs

the

same

funotions

as

RSTDMA~

2.

Microprocessor

and

Tape

Drive

Resets:

•

Mioroprocessor

RESET.

Reset

the

controller

microprocessor

when

any

of

the

following

conditions

oocur:

a.

The

+5V

supply

drops

below

4.6v.

b.

The +12V

supply

drops

below

9V.

c.

RSTSAC

is

set.

NOTE

Mioroprocessor

RESET

will

also

cause

a

tape

drive

reset

•

RSTSAC.

Activated

by

writing

a 1

to

Control

Register

B~

7.

RSTSAC

must

be

set

held

for

more

25

usee

then

cleared

by

either

writing

a

to

Control

Register

Bit

7

or

by a

RSTDMA.

13

lf

l.

'/

,I.

'

I

1.13

PROGRAMM'ING

SECTION

•

(Technically

The

SC-499

controller

is

designed

to

accept

The

S~-J99

shall

utilize

the

QIC-02

standard

the

QIC-02

command

set.

command

set

as

follows:

~-

'XV

\"'"

~-

SELECT,

SOFT

LOCK

OFF

r/)().

~

'\.

~

SELECT,

SOFT

LOCK

ON

~

,0

.t~~

BOT

~e.

'_fi}~

vERASE

~

.>,.~

/RETENSION

b'-

~

SELECT

Q11

FORMAT

--

SELECT

Q24

FORMAT

"WRITE

·WRITE

FILE

MARK

(WFM)

READ

FILE

MARK

(RFM)

READ

STATUS

H'2.7"

H'40~

H'60'

H'SO'

H'AO'

H t

CO'

:r,

f'J.

,-::;r'OJ

ill)

D

v,,_V

The

SC-499

shall

discriminate

between

DC300XL

and

by

measurement

of

BOT

to

LOAD

POINT

distance

appropriate

basic

drive

write

current.

1.13.1

STANDARD

COMMAND

DESCRIPTIONS

4t'P<01)

SELECT,

SOFT

LOCK

OFF

(0000

0001)

coco

O't.·

DC600A

cartridges

and

shall

select

The

SELECT

command

selects

the

tape

drive.

The

drive

shall

remain

selected

until

changed

by

another

SELECT

command

or

RESET.

u{t

2}

SELECT,

SOFT

LOCK

ON

(0001

0001)

~

\6

o,(:::y\ro

()::t9.

(],/('r\{:)

This

command

is

identical

in

function

to

the

SELECT,

SOFT

LOCK

OFF

command

and

additionally

provides

a

SOFT

LOCK

on

the

cartridge.

Execution

of

the

SELECT

command

or

RESET

unlocks

the

cartridge.

S~

3)

BOT

COMMAND

(0010

0001)

The

BOT

command

positions

the

tape

in

the

cartridge

in

the

selected

device

to

BOT

(beginning

of

tape).

S--r.P

4)

RETENSION

COMMAND

(0010

0100)

\-==

vy\tt-~

l

ZA1'lCJY\,

GVY'\

\J

The

RETENSION

command

shall

be

used

in

accordance

with

cartridge

tape

manufacturer's

instructions.

The

RETENSION

command moves

the

tape

in

the

device

to

BOT,

then

to

EOT

and

then

back

to

BOT.

~rf

5)

ERASE

COMMAND

(0010

0010)

The

ERASE

command

completely

erases

the

tape

in

the

selected

drive.

The

ERASE

command moves

the

tape

in

the

device

to

BOT,

activates

the

erase

head

and

moves

to

EOT,

deactivates

the

erase

head

.Users

should

familiarize

themselves

with

the

QIC-02

REVD

intelligent

interface

STANDARD

manual.

14

and

moves

the

tape

back

to

BOT.

The

ERASE

command

also

fulfills

the

requirements

of

initialization.

6)

WRITE

COMMAND

(0100

0000)

When

the

WRITE

command

is

issued

the

device

requests

and

transfers

data.

The

READY

line

is

activated

when

the

device

is

ready

for

a

data

block

transfer.

When

the

READY

line

is

active,

the

host

terminates

transfer

of

write

data

by

issuing

a WRITE-FILE-MARK

command.

NOTE:

A

write

command

following

cartride

insertion

or

RESET

shall

commence

recording

at

BOT

end

of

tape,

otherwise,

recording

shall

commence

at

the

curre~t

tape

position.

NOTE:

If

the

host

starts

transfer

between

blocks

before

READY

is

asserted,

READY

may

not

be

asserted

when

the

early

warning

hole

of

the

last

traok

is

detected

by

the

devioe,

thus

the

device

ceases

to

transfer

additional

data

blocks

from

the

host.

The

device

terminates

the

WRITE

command

and

reports

END

OF

MEDIA

by

means

of

an

EXCEPTION

and.READ STATUS.

7)

READ

COMMAND

(1000

0000)

When

the

READ

command

is

issued

the

device

transfers

data.

The

READY

line

is

activated

when

the

devlce

is

ready

for

a

data

block

transfer.

The

READ

command

shall

be

terminated

by

the

device

if

a

file

mark

is

detected.

The

host

is

informed

by

means

of

an

EXCEPTION

and

a

READ

STATUS

sequence.

When

READY

is

true,

the

host

may

alternatively

terminate

the

READ

command by

issuing

a READ-FILE-MARK

command.

If

a

READ

command

is

issued,

the

command

is

accepted

and

the

drive

continues

reading.

NOTE:

A

READ

command

following

cartridge

insertion

or

RESET

shall

commence

at

BOT,

otherwise

the

read

command commences

from

the

current

tape

position.

NOTE;

If

the

host

starts

transfer

between

blocks

before

READY

is

asserted,

READY

MAY

NOT

BE

ASSERTED.

8)

WRITE-FILE-MARK

COMMAND

(0110

0000)

The WRITE-FILE-MARK

(WFM)

command

causes

a

file

mark

to

be

written

on

the

tape

in

the

selected

drive.

NOTE:

a

WFM

command

following

cartridge

insertion

or

RESET

shall

commence

recording

at

BOT

end

of

tape,

otherwise,

recording

shall

commence

at

the

current

tape

position.

~~

9)

READ-FILE-MARK

COMMAND

(1010

0000)

The READ-FILE-MARK

(RFM)

command

causes

the

tape

in

the

selected

drive

to

be

moved

to

the

MARK.

NOTE:

A

RFM

command

following

cartridge

insertion

or

RESET

shall

commence

reading

at

the

BOT,

otherwise,

reading

shall

commence

at

the

current

tape

position.

~10)

READ

STATUS

COMMAND

(1100

0000)

The

READ

status

command

provides

the

host

with

information

about

the

selected

device.

The

host

issues

the

READ

STATUS

oommand. The

device

transfers

the

standard

six

bytes

to

the

host.

15

J

11)

SELECT

Q11

FORMAT

COMMAND

(0010

0110)

The

SELECT

Q11

format

command

selects

the

Q 11

format

as

the

rrent

format.

12)

SELECT Q24

FORMAT

COMMAND

(0010

0111)

The

SELECT Q24

format

command

selects

the

Q24

format

as

the

current

format.

1.13.2

INTERFACE TIMING

Timing

specif

-

defined

at

the

driven

end.

Requirements

involving

deskew

hall

be

the

responsibility

of

the

receiving

end.

Interface

s

timing

shall

be

outlined

in

the

following

diagrams.

FIGURE

DATA

TRANSFER

Write

Operation.......................................

1-5

Read

Operation........................................

1-6

COMMAND

TRANSFER

Ready

Asserted........................................

1-7

Exception

Asserted....................................

1-8

Direction

Deasserted..................................

1-9

STATUS

BYTE

TRANSFER

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

1-10

16

REOUEST

I I

---

..

~

,.

I

READY

/

I I

EXCEPTION

......

DATA

BUS

lTd<

~

1ST DATA

OCTO

TRANSrER

"

ACKNO£.JL(OGE

I

,~

A;-/

I

DIRECT

JON

......

I

-

RESET

......

,1ptly1ty

T1-Device Asserta

READY

(Device

READY

tor

Firat

Data Slock)

T2-Controller Asserta

TRANSFER

!3-Data Sus

'alid

T4-Device Deasserts

READY

!S-Device Asaerts

ACKNOWLEDGE

T6-Controller Deaaaerta

TRANSFER

!7-Bus Data

Iavalid

fa-Device Deaaserta

ACKNOWLEDGE

T9-Controller Aaserta

TRANSFER

TlO-Data Sus

'alid

T1'-Device Asserts

ACKNOWLEDGE

T12-Controller DeesBerta

TRANSFER

!13-Bus Data

Invalid

T1_-Device Deaaserts

ACKNOWLEDGE

T1S-Device Asserts

READI

(Device

READY

For

.ext

Data Slock)

I

I I

'IS~

I I

/n':J

""ST

'~}77nf

¥LA.

DATA

OCTn

NLLL4

'""

'.2/

I

I I

tim

ln

s

o us. < ,T1----)12

T2---->13 <

_0

as.

o

us.

(T2----)T_

< 1 us.

0.5

us.

< T2---->T5

<100

us.

o us. < 1'5--->'1'6

o us

~

< 1'5---->1'7

o us. < T6---->T8 < 3 us.

o

us.

<

T8--->19

1'9----)T10 <

_0

DS.

0.5

us.

< 1'9---->T11 (100 us.

o us. < T11---)T12

o

us:

< T11---)T13

D us. < 1'12---)T1_ < 3 us.

TOO

us. < T1---->115

'Hote:

It

the

Controller

asserts

TRANSFER

before

the

device

.Bse~t8

READY,

then

the

behavior

or

READY

is

device

dependent.

READY

ahall

Dot

be

asserted

tor

an

EXCEPTION

condition.-

P!pre

1-5

Data

Trauter,

WrIte Operat1oD

17

REOUEST

READY

I

~--------~I

I~------------~I

.-~.-

~

--

~

I-------------------~~I

.

~

,.

. 'I~

[XCEPTJON

DATA

BUS

TRANSfER

I I I I

-----

,.

Y.w4'

b7J

IIST

DII'"

~

b7n:J

IST

OCTET

JCL~,

OCTET

W'$!'%

~,

I..

114

I

,IS

R I

'I~

/~lS

ACKNO'-JLEOGE

OlRECTJON

~

I

RESET.

----.-

.

fl-Device Chanses

DIRECTION

f2-Device Asserta

READY

f3-Device Asserts

AC[NOWLEDGE

T~-Bus

Data Valid

fS-Controller Asserts

TRANSFER

T6-Device Deasserts

READY

fT-Device Deasserta

ACKNOWLEDGE

fS-Bus Data

Invalid

T9-Controller Deaaserta

TRANSFER

flO-Device Asserta

ACENOWLEDGE

T1'-Bus Data

Invalid

f12-Controller Asserta

TRANSFER

!13-Device Deaaaerts

AC[NOWLEDGE

T1~-Bus

Data

Invalid

!15-Controller

Deaaaerts

TRANSFER

T16-Dev1ce

Asserta

READY

T17-Device Assert a

ACKNOWLEDGE

!lS-Bua Data

'alid

I f

!'13

f,7

I

f3---->T~

<'0

us.

o us. <

!t----)T~

o us. <

T~--->rs

o

us.

< TS----)T6 < ,

us.

0.5

us.

< TS---->!7 < 3 us.

o us. < TS----)TS

o us. < T7----)Tg

fl0---)Tl1

<

'0

DS.

o

us.

< T1,---)T12

0.5

us.

< T12---)T13 < 3

us.

o uS.,<

Tt2---)Tt'

o us. < T13---)T1S

T17---)T18 <

'0

DB.

-Note:

It

the

Controller

asserta

TRANSFER

betore

the

device

asaerts

READY,

then

the

behavior

or

READY

is

device dependent.

READY

aball

Dot

be

asserted

tor

an

EXCEPTION

conditioD.

"!pre

1-6

Data

fraut.,.,

...

d

Operat10D

18

.

REOUEST

I

~J

'v

READY

I

4.

~

I

EXCEPTJON

.. _ ..

DRTA

BUS

f$<

~

I

TRANsr£R

..

_

..

ACKNOI.JL£DG£

I

. f .

DJRECT

JON.I

••

_

••

RESET

I

.----

Agt1y1ty

t1-Bus Data

'altd

!3-Controller

'aaerts

REQUEST

t~-Dev1ce

Deasaert.

IEADY

!5-Device

'aaerts

READY

!6-Controller

Dealsert.

REQUEST

!7-Sus

Data

Invaltd

!8-Device Deaaaerta

IEADY

I

,r

I

n I

~$~

DCVlce

I STMTS

CICCUTION

I

tWins

o

ua.

<Ti-

---)T3

o ua. <

t3-)Tj&

< , ua.

'.---)T5

<500

~.

~

us.

<

!5--)!6

o ua. <

1'6--)T7

20 ua. <

1'6-)T8

(100

us.

PJ.&ure

1-'

C: M

rrauter,

R&D!

Aaaerted

D

~~

.........

t

____

nor

hJ~

+---I\d'}

( -

~t·--.uP_

506~;"~~~

,..-,'

~

.I

~ID.\~

19

REOUEST

I

~~

READY

I

"t4

rXCEPTJON

I

"/

DATA

BUS

~X

• I

TRANSF"(R

,

ACKNOWLEDGE

.-

...

-

I

DIRECTJON

..

~-.

I

•

RESET

......

',-Bus

Data Valid

T2-Controller Asserts

REQUEST

'3-Devlce Deaaaerts

EICEPTIOH

'.-Device

Asserte

READY

'5-Controller

Deaaeerta

REQUEST

T6-Bus

Data

Invalid

'7-Devlce Deasserts

READY

~

tv

I

"/

I

" I

X000//7/7/ff//~

o

us.

<

"--)1'2

o

us.

< '2--->13

~

10

\'\s. <

1'3--)1"

o

us.

< 1'''---)1'5<

o

us.

< 1'5--->16

20

us.

< 1'5---)17 ( 100

us.

I

P1pre1-8

'C:

nd

rruate

.. ,

DClPnOI

haerted

20

REOUEST

READY

I

".,

~

____________

-Jn~

I

EXCEPTION

DATA

BUS

TRANSrER

,

I

fl

/fJ

DIRECTION,

....

___

--'/14

i

RESET

•

___

_

Apt1y1ty

T1-READY

Asserted

T2-Controller

'sserta

REQUEST

!3-Device Deaaaerted

READY

!4-Device Deasaerta

DIRECTION

T5-Bus

Data

'alid

!6-Dev1ce , Asserts

READY

!7-Controller

Deaaserts

REQUEST

!8-Bus Data

Invalid

'9-Device Deaaserts

ACKNOWLEDGE

!10-Device Deaaaerts

READY

f"~

__

--,/'I'

I

tim

ins

' -

o

us.

< T1---)'1'2

o us

•.

T2--)'1'3

- 0 us. < T3---)'1'_ < 150 us.

'_---)T5

< 1 us.

'.---)T6

<

500

ua.

o

us.

<

'6--)'1'1

o us. <

TT--)T8

o us. < T9---)T10

20 us. <

TT--)T10

< 100 us.

PJ.sure

1-9

Cc

ncS

1'rauter,

IIIICTIOI

Deaaeerted

21

REQUEST

,

~4

,y-/ICIO

~

KN'IHJHG J 112

'T"TUS

READY

"Byte.

EXCEPTION

I I I I

~n

~

TI

I'''TUS

TI2

I

DATA

BUS

><

ST"TUS

~~t

il

~><ByteXWY~

TRANsrER

I

ACKNOl.JL(OGE

I

DIRECTION

~I

.

. I

RESET

-----

Agt1y1tx

'1'1-Device

Changes

Bus

DIRECTION

'1'2-Bus

Data Valid

T3-Dev1ce

Aaserta

READY

'1'.-Controller Aaserts

REQUEST

!S-Device Deaaserts

READY

!6-Bua Data

Invalid

!7-Controller

Deaaserta

IEQOEST

!8-Bua Data

'al1d

tg-Device Aaaerta

READY

'1'10-Controller Aaaerta

REQUEST

'1'1'-Device Deaaaerts

READY

'1'12-Bus

Data

Invalid

'1'13-Controller »eaaaerts

REQUEST

I

I I

I.

I

I I

"imiag

o

us.

< '1'1----)T2

o ua. <

,2----)13

o ua. <

'1'3---->'1'_

o ua. <

'1'.-)T5

<,

us.

o ua. < T5----)'1'6

20

us.

<

,.----)'1"1

o ua. < !1----)T8

20

us.

(

T7---)T9

o

us.

<

'9----)T10

o ua. ('1'10----)T11 < ,

us.

o

us.

(110----)T12

20

us.

<T10----)T13

P.taure

1-10

Statu

l'yte.

tnDater

22

1.13.3

PROGRAMMING

FLOW

CHART

The

following

diagrams

depict

the

flow

of

the

command

structures.

These

flow

charts

are

helpful

for

any

software

engineer

who

is

designing

a

software

driver.

The

flow

charts

shall

be

specified

in

the

following

diagrams.

DESCRIPTION

FIGURE

READ

NTH

FILE

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••

1-11

READ

FILE

WITH

SPECIFIC

1st

BLOCK

ID

FLOW

DIAGRAM

••••••••••

V"

APPEND

FILE

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••••

/

READ

FILE

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••••••

/wRITE

FILE

FLOW

DIAGRAM

••••••••••••••••••••••••.••••••••••••

t/

READ

FILE

MARK

FLOW

DIAGRAM

••••••••••••••••••••••••••••••••

~WRITE

FILE

MARK

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••

1-12

1-13

1-14

1-15

1-16

1-17

~ERASE

COMMAND

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••

1-18

~ITIALIZE

CARTRIDGE

COMMAND

FLOW

DIAGRAM

••••••••••••••••••

~BOT

COMMAND

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••••

~

SELECT,

SOFT

LOCK

COMMAND

FLOW

DIAGRAM

•••••••••••••••••••••

~

SELECT

FORMAT

COMMAND

FLOW

DIAGRAM

•••••••••••••••••••••••••

/

RESET

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••••••••••

DONE

/'

READ

SEND

FLOW

DIAGRAM

••••••••••••••••••••••••••••••••••••••••••

STATUS

FLOW

DIAGRAM

•••••••••••••••••••••••••••••••••••

COMMAND

FLOW

DIAGRAM

••••••••••••••••••••••••••••••••••

23

1-19

1-20

1-21

1-22

1-23

1-24

1-25

1-26

READ

NTH

FILE

FLOW

DIAGRAM

NO

Figure

1-11

24

::

SET

ERROR

1tAC·

,

READ

FILE

WITH

SPECIFIC

1ST

BLOCI

ID

FLOW

DIAGRAM

Figure

1-12

?J;

APPEND

FILE

FLOW

DIAGRAM

Figure

1-13

26

~£AD

FILE

FLOW

DIAGRAM

Figure

1-14

WRITE

FILE

FLOW

DIAGRAM

•

Figure

1-15

28

READ

FILE

MARK

FLOW

DIAGRAH

Figure

1-16

29

WRITE

rILE

MARX

FLOW

nIAGRAM

Figure

1-17

30

ERASE

COMMAND

FLOW

DIAGRAM

Figure

1-18

31

INITIALI2E

CARTRIDGE

COMMAND

FLOW

DIAGRAM

BUILD

RETENSION

COMMAND

Figure

1-19

32

BOT

C()M)'.ANI)

FLOW

DIAGRAM

Figure

1-20

33

SELECT,

SOFT

LOCI

COMMAND

FLOW

DIAGRAM

BUILD

SELE

SOFT

LOCK

COMMAND

Figure

1-21

'1/.

SELECT

FORMAT

COMMAND

FLOW

DIAGRAM

BUILD

SELECT

FOP.MAT

COMMAND

Figure

1-22

35

RESET

FLOW

DIAGRAM

ESE

I

Figure

1-23

DONE

FLOW

DIAGRAM

(

Figure

1-24

37

aEAD

STATOS

PLOW

»IAGRAK

BEAD

STATUS

CDt9.ND

Figure

1-25

38

MAD

I>ATA

BUS

ASSER'!'

DQ

SEND

COMMAND

FLOW

DIAGRAM

Figure

1-26

39

-.

{-

0)D6

-

~a.}L

otllcNf'

.

.ex(--~

~lAbt

tl/IU-DtAT

~e\\l

J

1ef):J

f,

•

\ /

(

Archive_SC 499_Tape_Controller_Information_Guide Archive SC 499 Tape Controller Information Guide

Archive_SC-499_Tape_Controller_Information_Guide Archive_SC-499_Tape_Controller_Information_Guide

Navigation menu

Versions of this User Manual:

Views

Navigation