89637200 02_1742 30_1742 120_Line_Printer_Controller_Ref_Aug74 02 1742 30 120 Line Printer Controller Ref Aug74

User Manual: 89637200-02_1742-30_1742-120_Line_Printer_Controller_Ref_Aug74

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CONTROL

DATA

CORPORATION

CONTROL

DATA®

1784 COMPUTER

SYSTEM

1742-30

AND 1742-120

LINE PRINTER CONTROLLER

REFERENCE MANUAL

PRELIMINARY

REVISION

RECORD

REVISION

DESCRIPTION

01

Preliminary

Edition,

Released

Class

B,

ECO

CK

124

(8/18/73)

02

Publication

changes

and

corrections,

ECO

CK 937

(8/28/74)

PUBLICATION

NO.

89637200

ADDITIONAL

COPIES

OF

THIS

MANUAL

MAY

BE

OBTAINED

FROM

THE

NEAREST

CONTROL

DATA

CORPORATION

SALES

OFFICE.

COPYRIGHT€)

CONTROL

DATA

CORPORATION,

1973,

1974

PRINTED

IN

THE

UNITED

STATES

OF

AMERICA

ADDRESS

COMMENTS

CONCERNING

THIS

MANUAL

TO:

CONTROL

DATA

CORPORATION

SMALL

COMPUTER

DEVELOPMENT

DIVISION

44SS

EASTGATE

MALL

LA

JOLLA,

CALIFORNIA

OR

USE

COMMENT

SHEET

IN

THE

BACK

OF

THIS

MANUAL.

89637200

01

PREFACE

This

manual

gives

reference

information

for

the

CONTROL

DATA~

1742-30 and 1742-120 Line

Printers

which

may

be used in

conjunction

with

the

Interrupt

Data Channel

of

the

1784 Computer. For

reference

information

on

the

1784 computer and

peripheral

equipment (which

attach

directly

to

the

1784

Computer)

see

the

1784 Computer System

Reference

Manual,

Publication

No.

89633400.

iii

iv

Introduction

Functional

Des

c

rip

t i on

2

3

System

Relationships

Data

Word

Format

Alarm

Program

Protection

Reply/Reject

Interrupt

Contro

1

Character

Typical

Configuration

Equipment

Select

and

Protect

Bit

Jumper

Plugs

Q

Register

Format

Hexadecimal Code

for

Equipment

Selection

3

3

3

3

3

4

2

4

Code

2

CON

TEN

T S

FIG

U

RES

TAB

L E S

Programming

Codes

Converter

Equipment

Command

Operation

~

5

6

2

Contro

ller

Function

Code

Format

Status

Code Format

Data

Transfer

Format

Addressing

Codes

4

6

6

6

6

11

11

5

5

5

4

89637200

01

INTRODUCTION

FUNCTIONAL

DESCRIPTION

System

Relationships

. ®

The

CONTROL

DATA

1742-20 and 1742-120 Line

Printers

each

consist

of

a

controller

and a

printer.

The model 1742-30

prints

at

300

lines-per-minute

(LPM)

,

the

model 1742-120

at

1200

LPM.

The

controller

consists

of

a

single

50-PAK.

It

interfaces

with

the

AQ

data

channel

of

the

1784 computer.

The

controller

receives

and

interprets

function

codes

from

this

channel

to

initiate

the

print

cycle,

control

paper

motion,

and

enable

interrupts

when

specified

conditions

arise.

The

controller

includes

a

buffer

memory

that

is

capable

of

storing

one

character.

The

Line

Printer

includes

a

buffer

capable

of

storing

a

complete

line

of

pri

nt.

The

controller

interfaces

the

printer

with

the

lower

eight

bits

of

the

Computer A

register

(AOO

through

A07)

through

the

AQ

channel.

Typical

configuration

is

shown

in

Figure

1.

AQ

CHANNEL

LINE

CONTROLLER

INTER -

PRINTER

RUPTS

1784 COMPUTER

89637200

02

Figure

1.

Typical

Configuration

The

controller

may

be accommodated in

the

1784 Computer main

enclosure

or

in

the

1783-1 Expansion

Enclosure.

The

address

of

the

printer

and

controller

is

selected

by

inserting

jumper

plugs

in

positions

Ql

through

Q4

(location

56)

on

the

controller

circuit

card

(Figure

2).

The

jumper

plugs

are

stored

on

the

circuit

card

in

location

15.

Any

of

16

different

equipment

codes

may

be

set

up

by

these

plugs.

2

/

SI

7 PTcr

/

S5

/

Q07

/

S4

/

Q08

/

S3

/

Q09

/

S2

7

QIO

Figure

2.

Equipment

Select

and

Protect

Bit

Jumper

Plugs

TABLE

I.

HEXADECIMAL

CODE

FOR

EQUIPMENT

SELECTION

CODE

Li

nks

Q10 Q09

Hexadecimal

Code

0 0 0

I 0 0

2 0 0

3 0 0

4 0 1

5 0 1

6 0 1

7 0 1

8 1 0

9 1 0

A 1 0

B 1 0

C I 1

D 1 1

E 1 1

F I 1

Qo8

0

0

J

1

0

0

1

1

0

0

1

1

0

0

1

1

Q07

0

1

0

1

0

1

0

1

0

1

0

I

0

1

0

1

Note:

A

'0'

in

the

binary

code

indicates

the

presence

of

a jumper

plug

for

the

setting

of

the

equipment

code;

a'

I'

its

absence.

89637200

02

Data

Word

Format

Alarm

Program

Protection

Reply/Reject

Interrupt

89637200

01

A

single

data

word which

occupies

the

A

register

lower

eight

bits

(ADO

through

A07)

consists

of

a

single

8-bit

character

code.

An

alarm

indicates

the

presence

of

an abnormal

condition.

The

abnormal

conditions

are

divided

into

two

types.

1. Those which

cause

the

Printer

to

go

Not Ready,

requiring

operator

intervention.

These

conditions

are

paper

out,

paper

tear,

fuse

alarm,

and an open

interlock.

The

alarm

is

cleared

upon

correction

of

the

cause

for

the

Not

Ready.

2.

A

condition

allowing

Ready

status

to

remain. This

condition

occurs

when

ERROR

occurred.

For

definition

of

ERROR

director

status

see

Director

Functions.

When

the

Protect

jumper

plug

is

not

set,

input-output

instructions

not

having

the

protect

bit

set

are

rejected.

Director

Status

requests

are

not

rejected.

To

set

the

Protect

jumper

plug,

see

Operation.

Within

800

nanoseconds,

the

Line

Printer

always responds

to

an

Input-to-A

or

an Output-from-A

instruction

with

either

a Reply

or

a

Reject

signal.

A

Reject

signal

is

sent

by

the

printer

if

it

cannot

perform

the

function

of

transfer

instruction.

Four

conditions

that

will

cause

this

Reject

signal

to

be

returned

are:

1.

The

printer

is

Busy.

2.

A

program-protection

fault

occurs.

3.

The

printer

is

Not

Ready.

4.

Data

Status

is

false.

Four

interrupt

lines

are

available

between

the

Controller

and

the

Computer.

They

are

designated:

Data,

EOP,

Alarm,

Common

and

are

defined

under

the

Director

Status.

3

4

Control

Character

PROGRAMMING

Each

print

1

ine

is

prefaced

by a

Control

Character.

It

controls

the

paper

vertical

motion and

will

not

be

printed.

The

printer

operates

in

'pre-print'

mode,

that

is

paper

motion

is

performed

before

printing.

The

printer

executes

the

Control

Character

immediately

upon

reception

and does

not

set

Busy

Status.

The Busy

Status

will

be

set

after

reception

of

a

Print

Directive.

NOTE:

If

a

Control

Character

is

issued,

which

performs

a

vertical

paper

motion and

CLRP

Directive

is

issued

immediately

thereafter,

the

Busy

Status

will

be

set

until

paper

motion

stops.

Table

2 and

Figures

2

through

6

provide

programming

information.

A

description

of

the

codes

follows

the

figures.

TABLE

2.

ADDRESSING

CODES

COMMAND

CODE

QOO

= 0

QOO

= 1

Figure 3.

Input-to-A

Output-from-A

111

ega

1 Data

transfer

Director

Status

Director

Function

15

II

10

W E

Command

Code

Equipment

Code

Converter

Code

(all

'0'-5)

Q Register

Format

89637200

01

Figure

4.

Figure

5.

Figure

6.

89637200

01

A REGISTER

Clear

Controller

Clear

Interrupt

Data

Interrupt

Request

EOP

Interrupt

Request

Alarm

Interrupt

Request

Print

Function

Code

Format

A REGISTER

Ready

Busy

Interrupt

Data

End

of

Operation

Alarm

Error

Protected

Load

Image

(1742-120

only)

Status

Code

Format

00

CHARACTER

A REGISTER

Data

Transfer

Format.

5

CODES

Converter

Equipment

Command

6

Equipment Codes and

Command

Codes

are

described

in

the

following.

The W

portion

of

the

Q

register

(Qll

through

Ql5) must be

all

zeros

for

all

Line

Printer

operations.

The E

portion

of

the

Q

register

(Q07

through

Ql0)

defines

the

Line

Printer

equipment

code.

This

code

should

match

the

set-

up

of

the

four

Equipment

Select

jumper

plugs

shown

in

Figure

2.

The

Command

Code

(bit

00

of

the

Q

register)

defines

the

operation

to

be

performed

by

the

Line

Printer.

It

must be accompanied

by an Equipment

Code

and

either

a

Read

or

a

Write

signal.

Table

2

gives

the

Command

Code

functions.

DATA

TRANSFER

(QOO

= 0)

Write

Data

When

bit

QOO

is

zero

and an

Output-from-A

instruction

is

executed

the

Controller

is

directed

to

perform

a

data

transfer.

Data

will

be

accepted

unless

one

or

more

of

the

following

reject

conditions

is

present:

The Line

Printer

is

Not Ready,

the

Line

Printer

is

Busy

with

a

Print

operation,

Data

status

is

false

or

a

Protect

Violation

exists.

Bits

00

through

07

of

the

A

register

contain

the

character

bits

to

be

transmitted

with

leading

zeros

(A08

through

Al5

are

zero).

The

first

character

of

a

line

is

identified

as

the

Control

Character

and

is

not

printed.

When

6-bit

characters

are

transmitted

bits

06,

07

of

A

should

be

zeros.

The Data

Transfer

command

clears

EOP

and

ERROR

status.

89637200

01

89637200

01

DIRECTOR

FUNCTIONS

(QOO

=

1)

When

QOO

is

a one and

it

is

accompanied

by

both

an Equipment

Code

and

Output-from-A

instruction,

the

Controller

is

directed

to

perform

a

Director

Function.

Director

Functions

are

accepted

if

no

Protect

Violation

occurs;

with

the

following

constraints:

Print

Directive

is

accepted

if

Controller

is

Ready, Not Busy and

Data

Status

is

true

(bit

A03

=

I).

Director

Functions,

except

Print

directive

may

be

stacked,

that

is

two

or

more

functions

may

be

issued

at

the

same

time.

Clear

Printer

(AOO

=

I)

This

function

clears

the

Controller

logic,

clears

EOP

status

and

generates

the

Buffer

Cle~r

signal

to

the

Line

Printer.

It

generates

Clear

Interrupt

functions.

It

is

subordinate

to

all

other

bits

in

this

group

except

Print

(ADS).

Clear

Interrupt

(AOI

=

1)

This

function

clears

all

interrupt

requests

and

interrupt

responses.

It

is

subordinate

to

all

interrupt

requests.

Data

Interrupt

Request

(A02

=

I)

This

function

sets

the

Data

Interrupt

Request

flag.

This

in

turn

enables

the

generation

of

an

interrupt

when

Data

status

flag

is

true

indicating

that

data

transfer

to

the

Line

Printer

is

permitted.

The

Interrupt

Request

is

cleared

by

Clear

Printer

or

Clear

Interrupt.

The

interrupt

response

may

be

cleared

by

clearing

the

interrupt

request

as

stated

above,

or

by Data

Transfer

or

Print

functions.

Before

Data

Transfer

to

the

printer,

Data

Interrupt

may

be

requested

and

the

response

will

signal

the

computer

that

the

printer

is

ready

to

receive

another

data

transfer.

Without

reselecting

or

clearing

this

interrupt

response,

the

data

transfer

can

take

place.

During

this

data

transfer,

interrupt

response

will

be removed

until

the

printer

is

ready

to

receive

another

data

transfer.

7

8

End-of-Operation

Interrupt

Request

(EOP)

(A03

=

1)

This

function

enables

the

generation

of

an

interrupt

on

completion

of

an

operation,

when

EOP

occurs.

The

interrupt

may

be

selected

before

or

during

the

operation.

An

interrupt

response

will

not

occur

for

an

operation

which was ended

before

the

selection

was

made. The

interrupt

request

may

be

cleared

by

Clear

Controller

or

Clear

Interrupt.

The

interrupt

response

may

be

cleared

by

clearing

the

Request

or

by Data

Transfer

or

Print

functions.

Alarm

Interrupt

Request

(A04

= 1)

This

function

enables

the

generation

of

an

interrupt

when

an Alarm

condition

exists.

An

Alarm

condition

that

exists

at

the

time

this

interrupt

request

is

made

will

immediately

provide

a

response.

If

the

Alarm

condition

does

not

exist

at

the

time

of

the

interrupt

request,

the

interrupt

response

will

be

provided

as

soon

as

an

Alarm

condition

is

detected.

These

conditions

are

listed

in

the

Alarm

section.

The

interrupt

request

may

be

cleared

by

Master

Clear

or

by

either

ADO

= ]

or

AO]

= ]

with

A04

=

O.

The

interrupt

response

may

be

cleared

by

clearing

the

Request

or

by

Data

Transfer

or

Print

Function.

Print

Function

(AOS

= 1)

This

function

directs

the

Line

Printer

to

initiate

a

Print

operation.

A

print

operation

lasts

between

the

acceptance

of

a

Print

Function

and

completion

of

a

line

of

print.

The A

register

bits

06

through

IS

in

this

group

are

not

used.

DIRECTOR

STATUS

The Line

Printer

always

replies

to

therefore

replies

when

QOO

= 1 and

equipment

code and a

Read

signal.

described

below.

Ready

(AOO

= 1)

a

status

request.

It

it

is

accompanied by an

The

status

responses

are

Indicates

that

a Ready

condition

exists.

The

Ready

condition

must be

existing

before

the

printer

can

operate,

and

the

absence

of

anyone

of

several

requirements

can

prevent

this.

89637200

01

89637200

01

Busy

(AOl

=

1)

Indicates

that

the

Line

Printer

is

Busy.

The

Line

Printer

becomes

Busy

-

1. After the

initiation

of a

print

cycle

and

until

the

characters

have

been

printed.

2.

If

Clear

Printer

(AOO

=

1)

directive

was

issued

directly

after

the Control Character

has

been

issued.

Interrupt

(A02

=

1)

This

signal

indicates

that

an

interrupt

occurred.

The

other

status

bits

must be monitored

to

determine

the

cause

of

the

interrupt:

bits

A03

-

AOS

define

which

interrupt

occurred.

This

status

is

cleared

by

either

the

Clear

Printer

(AOO

= 1)

or

Clear

Interrupt

(AOl

=

1).

Data

(A03

=

1)

This

signal

indicates

that

the

Line

Printer

is

ready

to

receive

a

character.

If

Interrupt

on

Data has been

selected,

this

status

will

also

indicate

that

this

interrupt

has

occurred.

The

status

is

cleared

by

Clear

Printer

(AOO

= 1) and

by

either

Data

Transfer

or

Print

directive.

End-of-Operation

(EOP)

(A04

=

1)

Indicates

that

the

Line

Printer

has completed an

operation.

If

Interrupt

on

End-of-Operation

has been

selected,

this

status

bit

will

also

indicate

that

this

interrupt

has

occurred.

This

status

is

true

whenever

the

Line Ready

signal

goes

high.

The

status

is

cleared

by

Clear

Printer,

Data

Transfer,

Print.

Alarm

(AOS

= 1)

Indicates

that

an Alarm

condition

is

present,

that

is,

an

Error

or

Printer

Malfunction

occurred.

The

status

is

cleared

by

Clear

Printer

(AOO

=

1),

Data

Transfer

or

Print

directive

provided

that

the

cause

of

the

alarm

has been

corrected.

9

10

Error

(A06

=

1)

a.

For

the

1742-30 Line

Printer

this

signal

indicates

that

data

transfer

parity

error

occurred.

The

Parity

Error

occurs

when

an

incorrect

character

code

is

received

by

the

Line

Printer.

The

incorrect

character

code

is

printed

as

blank

if

it

is

a

data

character

and ignored

if

a

control

character,

i.e.,

it

is

performed

as

if

"Suppress

Space"

was

isstled.

The

Line

Printer

stays

Ready

when

this

condition

occurs.

The

status

is

cleared

by

Clear

Printer

(AOO

=

1)

or

either

Data

Transfer

or

Print

directive.

b.

For

the

1742-120 Line

Printer

this

signal

indicates

that

any

one

or

any combination

of

Parity

Error,

Synchronization

Error

or

Compare

Error

(indicated

on

the

PrJnter

console)

occurred.

In

case

of

Parity

Error

the

Line

Printer

stays

Ready.

The

condition

is

cleared

by

Clear

Printer

(AOO

=

1)

or

either

Data

Transfer

or

Print

directive.

In

case

of

Synchronization

Error

or

Compare

Error

the

Line

Printer

becomes Busy.

The

condition

is

cleared

by

Clear

Printer

(AOO

=

1)

only.

Protected

(A07

=

1)

This

bit

indicates

that

the

Controller

is

in

the

protect

state,

that

is,

the

protect

jumper

plug

is

in

the

Protect

position

(see

Operation).

In

this

position

the

Controller

accepts

only

instructions

having a 1

on

the

Program

Protect

line.

All

other

instructions

except

Director

Status

will

be

rejected.

The

Program

Protect

bit

is

ignored

when

the

Controller

is

not

in

the

Protect

state.

Load

Image

(A08

=

1)

In

the

1742-120 Line

Printer

this

bit

indicates

that

the

next

288

characters

will

be

transferred

to

the

Line

Printer

Image

Memory.

If

Parity

Error

occurs

no

further

transmission

takes

place

until

Clear

Printer

(AOO

= 1)

is

issued.

Load

Image

status

is

not

applicable

to

the

1742-30.

Bits

A09

through

A15

are

not

used.

89637200

01

OPERATION

Controller

89637200

01

Prepare

the

Controller

for

operation

as

follows:

a.

Set

the

Equipment

Code

as

required

according

to

Table

by

inserting

the

appropriate

jumper

plugs

in

position

(Figure

2).

b.

Set

the

Protect

Bit

as

required

by

inserting

the

protect

bit

jumper

plug

(PTCT)

in

position

(Figure

2).

c.

Connect

the

Device Cable

to

the

proper

connector

on

the

back panel

of

the

1784 Computer.

d.

Insert

the

Controller

card

in

its

place

according

to

the

system

configuration.

1 1

COMMENT SHEET

MANUAL

TITLE

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1_7_4_2_-_3_0_an_d_l_7_4_2_-_1_2_0_Lin_o_e_Pr_in_te_r_C_o_n_tr_o_l_le_r_R_e_~_er_e_n_c_e_M_an_u_al

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PUBLICATION NO.

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89_6_3_7_2_0_0

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REVISION

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evaluation

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Data

Corporation.

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