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Document:	DN92 Remote Station Users Guide Apr78
Order Number:	AA-5711A-TB
Revision:	0
Pages:	36
Original Filename:	AA-5711A-TB_DN92_Remote_Station_Users_Guide_Apr78.pdf

OCR Text

decsystemio
DN92 REMOTE STATION
USER'S GUIDE
AA-5711A-TB
April 1978

OPERATING SYSTEM:

TOPS-10 Version 6.03

SOFTWARE:

DN92 Version 1
NETLDR Version 2A(110)

To order additional copies of this document, contact the Software Distribution
Center, Digital Equipment Corporation, Maynard, Massachusetts 01754

digital equipment corporation - maynard, massachusetts

First Printing,

April

1978

The information in this document is subject to change without notice
and should not be construed as a commitment by Digital Equipment
Corporation.
Digital Equipment Corporation assumes no responsibility
for any errors that may appear in this document.
The software described in this document is furnished under a license
and may only be used or copied in accordance with the terms of such
license.

No responsibility is assumed for the use or reliability of software on
equipment that is not supplied by DIGITAL or its affiliated companies.

The postage-prepaid READER'S COMMENTS form on the last page of this
document requests the user's critical evaluation to assist us in preparing

future documentation.

The following are trademarks of Digital Equipment Corporation:

DIGITAL

DECsystem~-10

MASSBUS

DEC

DECtape

OMNIBUS

PDP

DIBOL

0s/8

DECUS

EDUSYSTEM

PHA

UNIBUS
COMPUTER LABS

FLIP CHIP
FOCAL

RSTS
RSX

COMTEX
DDT
DECCOMM
ASSIST-11

INDAC
LAB-8
DECSYSTEM-20
RTS-8

TYPESET-8
TYPESET-11
TMS-11
ITPS-10

CONTENTS

PREFACE

CHAPTER

INTRODUCTION

CHAPTER

DN92 OPERATOR PROCEDURES

CHAPTER

2.1

STARTING

THE

DN92

2.2

CHECKING

THE

HARDWARE

2.3

PROVIDING

STATION

THE

REMOTE

STATION

WITH

STATION WITH

SYSCHK
OPERATOR

PROGRAMS

PERIPHERALS

PRINTERS

.1
2
.1
CHAPTER

The
The

LA180 Dot
LP05 Drum

CARD READER
Cleaning the
TROUBLE

Card

Reader

SHOOTING

RESTARTING DN92 SOFTWARE AT THE REMOTE
STATION ERROR MESSAGES
EXAMINING REMOTE STATION MEMORY
USING DDT92

APPENDIX

1
2
3
4

Matrix Printer
Printer

STATE

AND

APPENDIX

SYSCHK

STATUS

ERROR

STATION

REGISTERS

MESSAGES

INDEX

Matrix

The

LP05

Drum

Printer

Reader

Front

Panel

Keys

and

Back
of

Lamps

Panel

the
on

Card
the

Bit Settings of State
Bit

Settings

Printer

Status

iii

|
A

Card

Console

Dot

Operators's

LA180

Reader

DN92

Console

DN92

The

[

The

Network

et bt bt ~d OV W b

Multilink/Multinode
Configuration

DWW
W W NN

s
et
R
W N

DECsystem-10
Typical DN92

A
A

FIGURE

vzshcufiawcumzw+a
[
T
U
TR T
B
B

FIGURES

CONTENTS

(CONT.)

Page

TABLES

TABLE

3-1
3-2

LP05
Card

Alarm

Indicators

Reader

3-3

Front

4-1

Console

Panel
Keys

4-2

System

Error

Back

Panel

Switches

3-5
3-6

Switches

the

Card

Reader

3-7
4-2

Messages

4-5

PREFACE

This guide is intended for users and
station
operators
who
are
at
remote
sites,
distant
from
the DECsystem—-10.
Everyone at a remote
site should read Chapter 1,
"Introduction";
operators
should
read
Chapter
2,
"DN92
Operator
Procedures"
and
Chapter
3,
"Station
Peripherals";
systems programmers, software installers
and
software
maintenance
personnel can benefit from Chapter 4, "Trouble Shooting".
The appendixes contain specifics on certain
DN92
registers
and
the
hardware

error

Supporting
If not
remote

messages.

Documentation

all the
station

Getting

DECsystem-10
Software
Notebooks
user should have at least:

Started with

DECsystem-10

are

DECsystem-10

Operating

System

[DEC-10-XGSDA-A-D]
[AA-0916C-TB]

the

Programmer's

Guide

and
[DEC-10-ONPGA-A-D]

following

documents

are

referred

DECsystem-10 Galaxy Operétion and
System Programming
and

its

Functional

Procedures

Software

this

manual:

[DEC-10-OGBOA~A-D]

update

DECsystem-10

Information

the

Commands

Manual

DECsystem-10 Networks
Reference Manual

Additionally,

available,

[DEC-10-0OGBOA~-A-DN1]
Notebook

10,

Specifications

installation

network

software

can

found

in:

DECsystem-10 Networks Software
Installation

Information

for

its

operators

Operator's

update

DECsystem-10

(KL
and

[AA-5156B-TB]

DECsystem-10

and

Guide

Operator's

Series)
its update

Guide

can

found

in:

[DEC-10-ODOGA-B-D]

[DEC-10-ODOGA-B-DN1]

Guide

[AD-5104A-TB]
[AD-5104A-T2]

CHAPTER

INTRODUCTION

A DECsystem-10 network contains both
host
DECsystem-10
processor)
and
network, each
processor
1is
called

local

typically

remote

the

host

for

DECsystem-10's can be

Console

in
links.
Figure
configuration.

NODE A

NODE B

DECsystem 10

DN87S

(directly

attached

processors.

node.

One

the

Within

the
is

DECsystem-10

but
processors,
several
a single network.
Connections
1-1 illustrates a DECsystem-10

CDR

[¢]

NODE C

host

interconnected

between nodes are called
network with a multilink

several

remote

modem

DNB2
remote station

NODE AB

DN87

LPT

TTY'S

modem

NODED

NODE E {with a DECnet compatible part)

host

o
TTY'S

]} Console FE
Figure

Within
using

to a DECnet node

DN87S

DECsystem 10

1-1

A DECsystem-10 Multilink/Multinode Network

a DECsystem-10 network,
the
DDCMP!
and
NCL?

all communication between nodes is done
protocols;
when a DECsystem-10 node

communicates with a DECnet node,
used

(the

DECnet

the DDCMP

compatible

port

and

software

NSP?3
takes

DDCMP:
Digital Data Commmunications Message Protocol
NCL:
Network Control Logic

NSP:

Network

Services

Protocol
1-1

protocols
care

are

the

INTRODUCTION

translation between NCL and NSP).
Thus DIGITAL processors of
various
types
can
be
connected
1in many ways to provide flexible networking
arrangements.

network

hosts,

containing

remote

stations

and

multiple

SET

HOST

command

can be

connects

used
and

specify

where

the

commands

and

host

that

programs

any

are

information on these aspects
of
networking,
see
Networks Programmer's Guide and Reference Manual").

If you
must

DECsystem-10

the

are

the

user

learn

how

remote

station

your

equipment

operate

user

executed

the

what

"DECsystem-10

a DECsystem-10

and

terminal
(for

network,
case

you

things

go wrong.
Some problems may originate at your station and can perhaps
be corrected there.
Other problems may occur at the node to which you
are connected.
These
problems
may
cause
your
station
to
cease
operations.
If
your
host processor goes down, you may have to wait
for it to come back up again (in a multihost network you may
be
able
to "SET HOST" to another processor).
For a remote station to communicate with its
DECsystem-10
host,
the
required
network software must be installed at the DECsystem-10 host.
Once this task has been completed, the remote station can
be
loaded.
When
the station is turned on, it sends (from a bootstrap ROM or when
its operator presses some keys) a "request-to-load" message
over
the
line
to
the
DECsystem-10.
This
message
asks the DECsystem-10 to
downline load the installed software into remote station memory.
When
the
1load
process has been completed, a message of the following form
is displayed or printed at the remote station operator's console:
[INITIALIZING

NETWORK

...

V...

NODE...]

Once loading has been successful, the standard identification
message
(with
a
system
number and period prompt) from the DECsystem-10 host
appears.
(If
1loading
1is
not
successful,
the
INITIALIZING
and
identification

messages

not

appear.)

After

this

message

appears,

users canh log in and start running their programs or
processes.
For
example,
at a
DN92 remote station, the following sequence occurs at
startup time:
@

The
operator/user
turns
on
the
station
power
and
the
operator's
console
terminal;
a % (percent) sign appears and
the cursor blinks on the screen.
The ROM bootstrap at
the
station
starts
automatically
and
sends a load request to the remote host.
The octal display registers on the operator's
console
change

e¢

The

occurs.

message:

[INITIALIZING NETWORK DN92 V(0.7

appears on the operator's console
e

NODE

when

"DN92"]

1loading

complete

(the
node name that appears may be different from that in the
example).
A successful software load is followed by execution of SYSCHK,
a
hardware
diagnostic
program.
Hardware
problems
are
indicated by appropriate error messages (see Appendix B).
For

INTRODUCTION

example,

if certain devices are not
attached
at
the
remote
station,
the bell/buzzer of the terminal sounds and a message
of the following type is displayed:
$3TTY10

NO XMT

These NO XMT
not

Hardware

FLAG

messages

can

problems

must

resolved

field

service

host has
comes on
example:

been
line

the
1loading
of
software from the
has been successfully run, the node
sends the usual signon message, for
RS300

The

user

ignored

KL10

can

devices

are

SYS#1026

then

log

personnel.

(ren)
;

number)

with

.LOGIN
61

the
a

14:37:36

and

get

system

sharp

Once

completed and SYSCHK
and the DECsystem-10

started

his

own

tasks.

Log in to the host processor in exactly the same way
a local terminal connected to the DECsystem-10.
For
above prompt indicates that your terminal is
ready

JOB

the

needed.

prompts

for your

ppn

as if you were at
example, when the
for
login
enter

(project,

programmer

(#):

RL340A KL10

SYS#1026

TTY211

#
Enter

your

ppn

The

system

asks

for

your

password:

time-date-day

#27,5117
Password:
Enter

your

unechoed

password

displayed:

Password:
1016

07-NOV-77

important

valuable

Mon

feature

the

wuser

TOPS-10
a

remote

operating
station,

system,
the

provides brief descriptions of many TOPS-10 commands
the user's terminal.
To use this command, type:
HELP

list

are

For

The

all

commands
To

have

terminal,

HELP

programs

and
the

programs
HELP

file

for

which

for

HELP

files

particular

are

available

command

displayed

enter

command

example,

HELP

QUEUE

syntax

and

obtain

switches

the

for

HELP

the

file

for

command

the

are

QUEUE

Commands

Manual.

command,

enter:

output.

For more information on all DECsystem-10 commands,
System

command.

and

output.

your

particularly

HELP

see

the

Operating

CHAPTER

DN92

OPERATOR PROCEDURES

The DN92 is a PDP-8A based remote station for
the
DECsystem-10.
It
can
exist
1in
a number of different configurations and can contain a
card reader, a line printer and several user
terminals
(TTY's).
An
operator's
console is always part of the configuration.
For example,
Figure 2-1 illustrates a typical DN92 configuration.

CARD READER

LINE PRINTER

OPERATOR'S
CONSO
8175-3

Figure

2-1

A Typical

If
neither
a
card
reader
nor
a
configuration,
up to 16 asynchronous
the DN92.
1If either a card reader or
both, up to 12 asynchronous lines can
and a card reader are included, up to
used.
Each
asynchronous
1line
can
terminal.
The
it

DN92

Configuration

1line
printer
is
used
in
the
lines for TTY's can be used with
a line printer is used, but
not
be used.
If both a line printer
8
asynchronous
lines
<can
be
be
attached
to
a single user

DN92 can have only one synchronous link to its adjacent node,
and
cannot
be
used
by
other
remote stations for routing messages.

Therefore,

the DN92

only

boundary

2-1

node

the

DECsystem-10

DN92 OPERATOR PROCEDURES
network;
1-1

2.1

it is always "at the end of the line".

For example,

illustrates a network containing a DN92 Remote Station.

STARTING THE DN92

REMOTE

Figure

STATION

To start the DN92 Remote Station, turn on the power at the
operator's
console
(see
Figure
2-2).
Both
power switches must be on and the
power lamp (on the back of the
operator's
console)
should
be
1lit.
Additionally, turn on the power for your terminal.

TERMINAL

ON/OFF
SWITCH

POWER

SWITCHES

8175-3

Figure

2-2

The DN92 Operator's Console

Once the power is on,
the
cursor
appears
on
the
screen
and
the
bootstrap
ROM
starts
up
automatically, sending its request-to-load
message to the host DECsystem-10.
Once the ROM is running, a
%
sign
appears
on the operator's console.
(This is the default action after
one minute, if you enter no NETLDR commands at the operator's console,
and
the
appropriate
entry
appears
in
the
NETLDR.INI
at
the
DECsystem-10 host.) As the host loads remote station memory,
and DISP lamps on the operator's console are altered.

Once
1loading
has
successfully
completed,
automatically executed at the remote station.

message of

the

following

form

is displayed:

[INITIALIZING NETWORK DN92 V0.7 NODE

the
SYSCHK
program
is
During its execution, a

"name"]

(The displayed node name is assigned at network installation
the

DECsystem-10

the ADDRS

time

host.)

Execution of SYSCHK takes about one minute.
Successful completion
of
SYSCHK
is
indicated
by the display of the DECsystem-10 host message
for

for

example:

RS300

KL10

SYS#1242

14:37:26

DN92

2.2

CHECKING

THE

OPERATOR PROCEDURES

HARDWARE WITH

SYSCHK

SYSCHK checks the components of the DN92
hardware

remote station to

isolate any

problems.

NOTE

SYSCHK is executed only when the
remote
station
1is
downline loaded;
SYSCHK is
not executed if the station is
manually
restarted (see Section 4.1).

SYSCHK issues messages to indicate station and line status.
Messages
which
can be displayed during SYSCHK execution are listed in Appendix
B.
These messages indicate important hardware
problems
particularly
with
the
DP8E
modem
controller;
if they occur, contact your field
service representative.
(The DP8E is a
synchronous
modem
interface
that provides

2.3

PROVIDING

a high-speed

THE

facility

for

modem control.)

STATION WITH OPERATOR PROGRAMS

To support a line printer and/or card reader at
the

remote

station operator

can

run

the

appropriate

remote

station,

spoolers manually

or, more typically, use the OPSER program.
(For more
information
on
OPSER,
see
the "DECsystem-10 Galaxy Operatlon and System Programming
Procedures" and the "DECsystem-10 Operator's Manual".)
To

set

up OPSER to

manually
operator,
node

run a line printer

and

c¢ard

reader,

run

OPSER

suppressing

1login

with
the
following
parameters
(as
the
remote
you normally log in under ppn [100+nn,2], where nn

station
is
your

number)
.

.LOGIN
Job

RS...

#172,2

operator

ppn

node

number

Password:
OPSER

run

OPSER

* : SLOGIN

log

in job for

*:DEFINE L=
*L-R LPTSPL
*L-START
*:SLOGIN
*:DEFINE C=

*C-R SPRINT
*C-START
* :MONITOR

1line

printer,

chatter (:LOGIN can also be used)
define L as the name for the current subjob
run LPTSPL
under
subjob
L
to
activate
station line printer
start the LPTSPL job for LPT720:
log in job for card reader
define C as the name for the current subjob

remote

run SPRINT to activate remote station card reader
start the SPRINT job for CDR720:
EXIT

to monitor

NOTE

L- and
each

C- do not
command

defined.

need
once

be repeated for
they
have
been

DN92

OPERATOR PROCEDURES

To have these commands executed
automatically,
the
remote
login can be done when INITIA is run at the DECsystem-10 and
commands can be placed in the .ATO file.
To do this, create

operator
the OPSER
a file in

your
operator's file area with the name OPR.ATO.
Place in it all the
commands to use OPSER and the necessary LPTSPL and SPRINT subjobs
(as
in the above example).
(For a description of INITIA, see the "INITIA"
specifications in Notebook 10.)

CHAPTER
STATION

PERIPHERALS

The typical DN92 station can contain a
1line
printer
and/or
a
card
reader.
These
units
are
briefly
described in this chapter and in
supporting hardware documents that are provided with your equipment.

3.1

PRINTERS

The printer available at your DN92 remote station
can
be
either
an
LA180 (a dot matrix printer that operates at a speed of 180 characters
per second) or an LP05 (a drum printer that operates at a speed of 300
lines
per
minute).
Both of these printers can print a 132-character
line.
To operate these units, you must know how to change and
adjust
paper
and
ribbons,
turn the equipment on and off and put it on- and
off-line.
Vertical paper motion such as line feed, vertical
tab
and
form feed on DN92 station printers is controlled by the DN92 software.

3.1.1

The LA180 Dot Matrix Printer

The LA180 can print both upper- and lowercase characters on full width
pin-feed
paper.
It
uses
a
7 x 7
dot
matrix
to form individual
characters and can handle multipart paper.
PINFEED GATES

VERTICAL

INNER COVER

MOTION KNOB

POWER SWITCH

/ON/OFF-LINE
SWITCH

TOP OF FORM
SWITCH

7595-5

Figure 3-1

The LA180 Dot Matrix Printer
3-1

STATION

paper

change

sure power

Lift

small

forms

is off

inner

Open pin-feed

PERIPHERALS

the

LA180:

(POWER rocker

cover

tractor

switch

in OFF position).

printer.

gates.

Feed paper from below through slot and up over
tractors
(be
sure
paper
1is
level;
adjust distance between tractors if
necessary by loosening right tractor
hold-knob
and
pushing
tractor along the guide rod).
Close

tractor

Close cover,

gates.

feeding paper

through

the

slot

behind

cover

window.

adjust paper

vertically to Top-of-Form,

knobs

change

the

Lift

Examine ribbon installed in the printer, making careful
note
of
the feed route.
Note that the ribbon route is shown on a

sure power
small

label

inside

Remove

the

LA180:

is off

inner

the

o0ld

appropriately.

the

left)

ribbon

to advance paper

rotate

(at right or

(POWER rocker

cover

switch

in OFF position).

of printer.

cover.

ribbon

saving

one

spool

the

post.

Insert the new ribbon, being careful to
thread
it
properly
and to wind the metal grommet near the end of the ribbon onto
the reel.
This grommet must not pass the ribbon guide.
6.

operate

the

printer

cover.

LA180:

1‘

Press POWER switch

To eject paper

Press ON/OFF LINE

to ON position.

to TOP OF FORM,

press TOP OF FORM switch.

switch to ON-LINE position.

STATION

3.1.2

The

LP05

PERIPHERALS

Drum Printer

The LP05 is either an
uppercase-only
or
an
upper/lower
case
printer
(see
Figure
3-2).
It uses full-width pin-feed paper,
rotating character drum, and controls for adjusting ink density,
width, horizontal and vertical alignment and forms thickness.
Each
which

printer

is
describes

provided
in

detail

with

small

how

load

booklet,
paper

and

line
has a
paper

"OPERATORS
GUIDE",
change ribbons.

HAMMER
FORMAT

RIBBON
GATE

PAPER

TAPE

POWER ON
ALARM CLEAR

READY

ON/OFF LINE

TOP
OF FORM

ON/OFF
CIRCUIT

BREAKER

Figure

3-2

The

LP05

3-3

Drum

Printer

STATION PERIPHERALS

This booklet can be found in the pocket provided for it inside the
the pocket is on the right side of the drum
(lift the «cover;
cover
gate). Once paper and ribbon have been installed, you are ready to
operate your line printer.
To operate

the LP05:

printer

Push power circuit breaker (beneath main

The power lamp on the operator's control panel

pPress ON LINE switch.

mechanism)

to ON position.

up after

1light

should

a few seconds.

It should light up.

This

places

printer on-line so that it can receive data for printing.

the

Make fine adjustments for paper or ink density, if necessary
(refer to your OPERATORS GUIDE booklet for these procedures).

If the ALARM lamp is lit, a malfunction has occurred, and the

printer

halts and generally goes off-line. To restart operations, you must
(the
determine the cause, correct the problem, press the CLEAR switch
ALARM lamp must go out) and press the ON LINE switch. The ON LINE
switch must be 1lit for the printer to operate.

When the ALARM lamp is lit, lift the printer

cover

and

examine

the

lamps above the control panel. The lamps and corrective action to
(lamps are
"LP05 Alarm Indicators"
take are listed in Table 3-1,
listed

in order of appearance).

STATION

PERIPHERALS

Table
LP0O5

Lamp

Alarm

3-1
Indicators

Indicates

Corrective

after

HAMMER

A print hammer has
malfunctioned (the print
buffer is cleared).

mechanical

malfunction

has caused too many line
feeds.
Printer goes
off-line.
RIBBON

ribbon

jam

occurred.

snag

Printer

has

goes

off-line.
GATE

Drum

gate

latched;

not

buffer

reappears,

Paper

jam,

paper

runaway

Printer
TAPE

(optional)

command

paper,

press FORMS RESET
switch (under
control

panel).

Correct

ribbon

feeding.

gate

Fix

paper

condition.

off-line.
Reload
and

VFU

correct

tape
it,

necessary.

has occurred.

goes

off-line.

CARD READER

The
at

goes

out

condition.

Either a parity error
in VFU memory or an
invalid tape channel

Printer

3.2

paper

Position

properly.

empty.
PAPER

contact

Service.

Latch

CLEAR

the lamp fails
go out or

Field
FORMAT

Action

pressing

card
a

right),
control

Toggle
card

reader

DN92

remote

station

reads 80-column punched cards
It contains an input hopper (upper
an optical card reading stat ion, an output hopper, switches
to
its operation and indicator lamps.

rate

285

switches

reader

(see

cards

its

Figure

per

minute.

back

panel

3-3).

are

used

turn

and

set

the

STATION PERIPHERALS

SHUTDOWN

LAMP TEST

C
‘REMOTE

Figure 3-3

AUTO

Card Reader Back Panel

These switches have the following uses:
Table

3-2

Card Reader Back Panel Switches

Use

Switch

POWER

Raise to turn on card reader.

LAMP TEST

Press to light indicators on front panel

SHUTDOWN

Set to specify operation of input hopper blower:

for

faulty

at MANual to operate blower continuously;
not
when
off
at AUTOmatic to shut blower
reading

MODE

(checks

lamps).

cards.

Selects on-line or off-line reader operation:
REMOTE
LOCAL

to place reader on-line under

program

control when RESET is pressed.
to use RESET, STOP switches to operate
the reader off-line for testing.

The front panel of the card reader contains switches and lamps that
reader to control
the card
used during normal operation of
are
activity and report error conditions

(see Figure 3-4).

STATION

I
POWER

PERIPHERALS

| STAcK |HOPPER|

| CHECK ICHECK

I
Figure

3-4

’CHECK 'CHECKI

Front panel

Table
Switches

Front panel

Switch

When

1lit,

POWER

Power

1is

Card

just

READ

| READ || PICK

CHECK

may

the

3-3
on the

STOP

RESET

Card Reader

Card

indicates

Reader

Corrective

on.

None.

encountered

damaged.

Remove

(and

repunch)

faulty

card

press

and

RESET.
the

PICK

CHECK

Card

just

may

encountered

damaged,

warped

reader

may

Action

deck

Reread

card.

Correct

card or
condition and press
RESET.

need

the

Reread

card.

cleaning.
STACK

CHECK

Card

just

damaged,

read
or

card

may

there

be
may

Clear jam or
repunch damaged
card.

jam.

Press

RESET

‘and reread the last
card.

HOPPER CHECK

Either:
input
and
been

hopper

card

empty
has

encountered,

output
full

EOF

hopper

Reread the last
card followed by
an

EOF

Empty

card.
the

hopper

RESET

Reread

STOP
and

switch
red

lamp

switch
lamp

the

read.

Press

1last

stop

reading cards.
Red lamp is 1lit,
RESET

RESET

press

continue

card

goes

green

output

and

green

lamp

out.

Press

green

lamp,

blower

and

reading

light
start

start

cards.

STATION

To operate

the

reader,

perform

Turn on card

Load input hopper with
up to 550 cards can be

Place

Press RESET.

You can load
operation.

3.2.1

card

the

reader

card

and unload

Cleaning

PERIPHERALS

the

following

steps:

power.

weight

cards (face
accomodated

top

down, column
at one time.

the

cards

the

left);

hopper.

|
cards

continuously

while

the

reader

1is

1in

the Card Reader

If your card reader is used almost continuously, it should be
cleaned
once
a
week.
Wipe
the exterior with a soft cloth and use a vacuum
cleaner to clear card dust out of the card path (turn off
the
power,
blow
out
the
path
from the input hopper to the stacker, and vacuum
it).

CHAPTER

TROUBLE

4.1

RESTARTING DN92

SHOOTING

SOFTWARE AT THE

REMOTE

STATION

Once the DN92 has been downline loaded from the host DECsystem-10,
it
can be restarted manually by the remote station operator if necessary.
This may be needed after the station has been powered down or if there
have
been problems at intermediate nodes.
The procedure
restarting the station uses the DN92 operator's console.

for

manually

Core memory in the DN92
(each
field
contains

(a PDP-8/A) is divided into four memory fields
4096 words).
Fields are numbered from 0 to 3,
and within each field, the 4096 locations are numbered
from
0000
to
7777 (octal).
Thus complete specification of location 0 in field 0 is

00000,

of location 20

field 3

is 30020.

The ROM

field

Each
word
in DN92 memory contains 12 bits.
(For more information on
the PDP-8A, see the
"PDP8/A
Miniprocessor
User's
Manual"
and
the
"PDP8/A Minicomputer Handbook" that come with your equipment.)

The DN92 operator's console contains a number of keys and
lamps
(see
Figure
4-1).
The ADDRS lamps contain the address of the location to
be accessed next.
The lamps display the contents of the three-bit EMA
(extended
memory
address)
and
the
12-bit
MA
(memory
address)
registers.
The DISP lamps display the contents of the
register
that
has

been

selected

for

display.

8970-2A

Figure

These

keys

are

presented
1in
bottom right.

4-1

Keys

and

briefly explained

order

Lamps

appearance

Table

the

DN92

4-1.

the

1In

Console

the

console,

table,

from

top

keys

left

are

TROUBLE

SHOOTING

Table
Console

Label

THIS

4-1
Keys

Function

Deposit

this:

loads

contents

entry

Boot:
begin

pressed twice,
execution.

DISP

Display:
contents

LSR

Load

causes

the

BOOT

pressed
after
another
of specified registers.

Switch

loads

into

by CPMA

program

key,

Switch

(central

displays

with

entry.

Load

Address:

enables

NEXT D

STATE*

Deposit

loads

address

loads

and
into
increments

pressed

STATE

Databus:

pressed

Memory

Load

Extended

before

lamp

BUS

Examine

this:

into

Bus:

Data

pressed

Bus

(data

and

entry

into

.DISP

key,

displays

key,

displays

CPMA

lit.

before

DISP

Databus.
Address:

loads

rightmost

Data
Field
(DF)
register;
Instruction Field (IF) register.
THIS

state.

Condition;

CPMA

FETCH

contents

State

data

into

processor-cycle

State
Memory

LXA

1loads

digit

1into

digit

into

address

CPMA

before

contents

DISP

11)

key,

Time

displays

State

contents

Bus

lamp

STATUS*

Status register: pressed before DISP
Kkey,
displays
contents
of STATUS register;
Status lamp lit.

Switch register:
pressed before DISP
key,
contents of switch register;
SR lamp lit.

INIT

Initialize:
generates INIT pulse, clears
AC,
LINK,
I/0
device
flags and
registers, and all interrupt
system flip-flops.

Examine next:
register into

*For

information on

the

1loads
contents
of
address
MB register;
increments CPMA

contents

this

displays

1in
and

CPMA
PC.

see Appendix A.

TROUBLE

Table

SHOOTING

4-1

(Con't.)

Console

Label

Keys

Function

Accumulator:

Multiplier
Quotient:
pressed
before
DISP
key,
displays contents of MQ register;
MQ lamp is 1lit.

HLT/SS

Halt/single step:
halts a running
one cycle in a stopped system.

RUN

Run:

contents of AC

pfessed

generates

flip-flop,

before

at Time

Mem

program

CPMA register;

RUN

State

Start

starts

lamp

DISP
AC

key,

indicator

system;

signal,

executing

lit.

displays
is

1lit.

executes

sets

RUN

the

numeric

at address in

NOTE

Entries within

angle brackets

are

key

names.

To load data into a register, enter an octal number with
keys, then use the appropriate key for the
example, to load the octal value 7000 into
display it, press:
7000

<LSR>

into

loads

7000

<SR>

press

<DISP>

and DISP to display the contents of
7000 appears in the DISP display.

For
and

DN92 software can be restarted with the ROM by

using

SR.

the

following

keys:

Halts

<INIT>

Performs

70 <LXA>

Loads extended address 70

<LA>

processor.

initialization

Field

0).

Loads

address

steps.

(Instruction Field 7,

Data

into CPMA register.

<INIT>

Reinitializes.

<RUN>

Starts program execution.
Run lamp is
registers
display
changing
digits;
console screen.

lit;
console
$ appears on

TROUBLE

This

sequence

located

copies
field

the
7,

SHOOTING

contents
starting

of
at

executes from there.
Restarting
INITIALIZING message to the screen
"Restarting" message:

$%$Restarting
("name"

DN92 NODE

defined

the

DECsystem-10
host).
When
registers contain changing

When

difficulties

messages

station

can

and

system

trouble-shooter

4.2

obtain

STATION

occur

appear;
can

ROM
0)

(1024

12-bit

to memory

field

in
this
manner
sends
the
after a few seconds followed

words
3

and

usual
by the

"name"

C.PAL
file
at
installation
time
on
the
the restart is complete, the ADDRS and DISP
digits;
the RUN and MQ lamps are lit.

they

status.

remote
give

remote

examine

station,

important

If more

examine

core dump to

the

location

information
station

the

number

information

memory

needed,
directly,

error

concerning

the
use

remote
DDT92,

situation.

ERROR MESSAGES

At station
startup
time
documented
in
Appendix
messages in Table 4-2 may
alphabetical order).

SYSCHK
is
run
(its
B of this manual).
At
occur (messages in the

error
messages
are
other times the error
table are
listed
in

TROUBLE SHOOTING

Table
System

4-2

Error

Messages

Meaning

Message

BAD

MESSAGE

TYPE

Unrequested data was
or

intermediate

received

from the host

node.

Carrier between synchronous modems had been
lost,
but has returned.
Operations can be

CARRIER BACK

resumed.
CARRIER

Carrier

LOST

between synchronous modems has been

lost.

DN92

CRASH PC=n

the

DN92

INT ERROR

fatal

software

operator

ERROR

occurred;

An
unknown
device
is
holding
down
the
DN92
the
Either
bus.
interrupt
configuration
file
used
at
installation
time
did
not
fit
the configuration or a
the
If
occurred.
has
hardware failure
Field

BUS

has

can dump core.

configuration

DP8E

error

After such
counter (PC) is given.
program
an
occurrence,
the
DN92
automatically
starts
up
the ROM after a few seconds and
sends the default load request to the host.
By
restarting the station at location 201,

file

Service.

1is

A malfunction occurred
or

transmit

correct,

contact

in the modem receive

clock.

LPT NOT...

Line printer is not properly
connected
station;
either malfunctioning or off.

LPTTRBL

The

and

line printer

may

has

timed-out unexpectedly

malfunctioning

(contact Field

Service).

NOTE

This

LPTTRBL

message

can

appear

only if the configuration file used
at installation time contained
the
FTTRBL
parameter
(see
the
Software
Networks
DECsystem-10
Installation Guide).

RDCHK-REFEED

CARD

by
read
being
card
A punched
READ-CHECK.
a
produced
reader

must be reread;
be

TTY NOT

CONNECTED

if it is damaged,

card
the
The card

must

replaced.

Either the DECsystem-10 or an
intermediate
node
is
down.
If the terminal is running
sounds
buzzer
a
when the node goes down,
and
the message is displayed.
If the node
is down when the terminal is turned on, the
message

is displayed.
4-5

TROUBLE

4.3

EXAMINING

You

can

REMOTE

examine

STATION

individual

SHOOTING

MEMORY

locations

memory

manually

long

the

station
is
running
and
on-line
to
the
DECsystem-10
host.
This
examination is done by using the keys on
the
operator's
console
to
place
the
contents
of
a given location in the MQ register and then
displaying this register.
You use the SR (switch register) to specify

the
address
of
the location you wish to examine.
The DN92 software
reads the specified
1location
and
places
1its
contents
in
the
MQ
register.
In
specifying
an
address, you must give both the memory
field and the location within that field.
For example, to specify and
display
the
contents of location 10020 (field 1, location 20), press
the following keys:
7771

<LSR>

Load

the

with

7770+n,

desired
0020

<LSR>

field.
the SR with

Load

<MQ>

Press

these

two

the

where

location within

1is

the

field

keys.

<DISP>

ADDRS

7722

specify

after

the

DISP

6041

and

display

0150

The

address
location are

the

example,

<LSR>

and
value
displayed.

contents

press

following

the

location

the

10150

location

the

field

which
is
the same as

does

not

the

reentered).
<MQ>

<DISP>

Press

ADDRS...

DISP...

The

these

two

address

location

need

1in

in
be

keys.

and

are

immediately

keys:

Load the
field
1

SR with the
(since
the
previous example,

specified

value

specified

displayed.

NOTE
You

cannot
locations in

4.4

USING

The

version

called

DDT92

recognize
must

examine

each

the
last
memory field.

eight

DDT92

DDT which

and

symbols,

so
available.

provided

has

version

for

useful

With

that

for

use

number

DN92

file
This

DDT92.MAC which must be compiled and linked on
process creates the DDT92.EXE file which can be

remote

station

command

with

memory.

the

/COMP

The

For

distribution

example,

switch:

stations

does

not

a CREF listing of the DN92 code
restriction, DDT92 operates with the

commands

DDT11l.

DDT92

work,

same

remote

3B(7)-1.

tape

compile

contains

the

source

the DECsystem-10.
used
to
examine

DDT92,

use

the

EXECUTE

TROUBLE

SHOOTING

.EXECUTE DDT92.MAC/COMP

This creates DDT92.REL and then runs the linker LINK:
use the EXECUTE command

.EXECUTE DDT92.MAC/COMP
MACRO:

DDT1l1

INPUT:

Loading
LINK:
[LNKXCT DDT11 Execution]
DDT11 3(7)-1
EXIT

create the DDT92.EXE file

.SSAVE DDT92

DDT92

to exit

saved

This creates and saves the executable DDT92 file.
To run this version of DDT,

run DDT92

.RUN DDT92
DDT11

use the RUN command:

3(7)-1=DDT92

Input: /N:24/8

specify node number and PDP-8.
NOTE

the
The node number you specify when at
to examine another node,
1is SELF;
DN92
to
node
specify the node number of the
look

at.

If you press some illegal combination of characters in response to the
"INPUT" prompt, the following error message is displayed:
Respond with file spec and/or switches.

Legal switches are: /11/8/BINARY/CORE/DTELDR/DUMP/GO/LA36

/LINE/MERGE/NODE/PATCH/PDP8/PDPll/PORT/SYMBOL/VT52

This program is further described in the DDT92.HLP file.

APPENDIX

STATE AND STATUS REGISTERS

Individual bits in these two 12-bit registers indicate the state and
The
status conditions of the communications link and the Omnibus.
the
settings of the 12 bits are reflected in the octal DISP register;
settings
the
determine
to
interpreted
be
therefore
must
values
octal
individual bits.

-—

(6]

The indicated bit = 1 means:

Octal display digit number:

pury

the

——

Fetch state
Defer state

Execute state

Contents of Instruction Register
MD DIR tine asserted

Break Data Cont line asserted (DMA operation)
SW line asserted (BOOT used)

Pause line asserted (10T instruction used)
Break in PROG line asserted (DMA operation begins at next cycle)
Break cycle asserted (DMA operation taking place)

Figure A-1 Bit Settings of State Register
1

Octal display digit number:
,

Link is set

0
T

(Not used)
Omnibus interrupt request line asserted

4
R

7
v

4
_

Interrupt inhibited
interrupt enabled
User mode line asserted

Contents of Instruction Field Register
Contents of Data Field Register

Figure A-2 Bit Settings of Status Register

|10

~—

fil

APPENDIX

SYSCHK

ERROR MESSAGES

Indicates

Message

DKC8

CLOCK

ERROR

DN92

WON'T

RUN

Either the DKC8
<clock
is
not
present,
Iis
malfunctioning,
or
the
processor
speed is
incorrect.
This is a fatal
hardware
error.
(SYSCHK
measured
line frequency-clock speed
against the time
taken
for
an
instruction
loop and found them incompatible.)
A PDPS8
A
test
for
the
existence
instruction indicates a PDPS8I.

DP8E

CHAR DETECT

SKIP

controller
FIELD

SELECT

hardware
(SYNC

FLAG WON'T

DP8E

9600

did

not

the

DP8E

come

up).

FAILED

CLEAR

flag

was

Connecting

BAUD

not

link

installed
(a
Load

properly

the
DN92
cannot
baud.
If the DN92
performance may be
DPS8E

BSW

problem

flag

Either no DP8E is
hardware
failure
did not execute).
DP8E

the

FAILED

There

DPSE

LOOPBACK

or
there
is
a
Field instruction

cleared.

faster

than

9600

transmit
faster
is used on
such
impaired.

baud;

than 9600
a
1link,

MODE

Probably a modem is in loopback mode
(SYSCHK
sent
a
pattern
and
received
it
Dback).
Correct the condition and either
reload
the

DP8E

MODEM NOT

READY

station
200 (see

or
restart
the program at
restart procedures, Section

Use

Read Status

a modem not ready.
be connected to the
DPS8E

CARRIER

instruction

location
2.5).
indicates

Check the modem;
it
line and turned on.

must

Use of a Read Status 2 instruction
indicates
carrier/AGC
not
present.
Check modems and
links to isolate the problem.

B-1

SYSCHK

ERROR MESSAGES

Indicates

Message

DPS8E NOT

CLEAR TO

SEND

Read

Status

instruction

clear-to-send not present or
power and Ready status.
DP8E NOT

SYSCHK
waited
a
received
no
SYNC

RECEIVING

and modem
RCVD

DP8E

DPS8E READ

are

suitable
characters

up.

indicates

Check

modem

interval,
but
(line interface

ready).

SYSCHK received non-SYNC characters (xx) from
the synchronous line.
SYSCHK will loop until
it receives SYNC characters.

CHAR DETECTED y RIGHT

This indicates
a
hardware
problem.
After
receiving a SYNC character, SYSCHK performs a
Read Character Detected Instruction.
1In this
case
the instruction returned y instead of 3
(3

the

correct value).

DPSE TERM NOT READY

Hardware failures are indicated.
SYSCHK used
a
DP8E
Load
Control instruction to put the
terminal in Ready status, but
when
checking
status with a DP8E Read Status 2 instruction,
status was indicated as Not Ready.

DPS8E

This indicates
a
hardware
problem
in
the’
DP8E.
SYSCHK
sent
and
received
data but
found unexpected
values
in
the
data-break
(WC,CA) registers.

DP8E

XMT

LPT

FLAG

OR CA WRONG

NOT

A modem

READY

WON'T CLEAR

LOOPBACK

not

clocking

correctly.

Probable hardware
failure
in
1line
printer
interface
(SYSCHK
unable
to
clear
1line
printer

TTYnn

flag).

MODE

The specified TTY is in
loopback
mode
(for
testing).
The condition must be corrected by
Field Service.
TTYnn

RUNNING

OPEN

The specified TTY is receiving
a
continuous
stream of null characters.
This condition is

undesirable and should be corrected by

Service.
TTYnn

NO XMT

FLAG

Field

Indicates either that no
terminal
has
been
installed
on the specified line, or that the
specified terminal has a hardware failure.

SYSCHK

ERROR MESSAGES

Message

Indicates

TTYnn RCV FLAG WON'T CLEAR

This is a fatal hardware error.
but could not clear the keyboard

(SYSCHK
flag).

read

TTYnn XMT FLAG WON'T CLEAR
This

indicates

could not clear

hardware

problem

(SYSCHK

the Transmit Done flag).

INDEX

% (percent)

sign,

1-2,

AC, 4-3
Alarm indicators,
LP05, 3-5
Asynchronous lines,

2-2

2-1

DN92
DN92
DN92

console keys, 4-2
CRASH PC=, 4-5
INT ERROR, 4-5
DN92 keys, 4-1
DN92 lamps, 4-1
DN92 memory fields, 4-1
DN92 ROM, 4-1
manually restarting, 4-3
DN92 word, 4-1

Downline load, 1-2
DPS8E BUS ERROR, 4-5
DPS8E modem controller,

BAD MESSAGE TYPE, 4-5
BOOT, 4-2
Bootstrap ROM, 1-2, 2-2
Boundary node, 2-1
BUS, 4-2

EMA,

Card hopper check,
Card jam, 3-7

Card pick check,
Card read check,

message,

DDT92, 4-7
SYSCHK, B-1
system, 4-5

3-7
3-7

Card reader, 3-5
cleaning, 3-8
Card reader front

4-1

Error

3-7

Examining

remote

memory,

station

4-6

panel,

3-7

Card

reader

panel

switches,

3-7

Card

reader
3-6
Card reader
CARRIER

power

switch,
,
switch, 3-6

BACK,

4-5

CARRIER LOST,

4-5

Cleaning
Command,

reader,

card

File,
OPR.ATO,
Front

card

HELP

Console keys,
DN92, 4-2
Controller,
DPS8E modem,

reader,

3-7

command,

1-3

HLT/SS,

4-3

Hopper

check,

card,
Host,

1-2,

2-4

panel,

3-8

HELP, 1-3
Configuration,
DN92, 2-1
Console,
operator's,

2-2,

4-1

3-7

1-1

HOST,

SET,

1-2

2-3

Indicators,
DDCMP,

LP05 alarm, 3-5
INIT, 4-2, 4-3
INITIA, 2-4

1-1

DDT92 error message, 4-7
DECnet compatible port, 1-1
DECsystem-10 network, 1-1

DISP,
DN92,

4-2,

4-3

2-3

INITIALIZING,

1-2

'
,

restarting the, 4-1
DN92 configuration, 2-1

Keys,

DN92,
DN92

Index-1

4-1
console,

4-2

INDEX

LA,

4-2,

LA180
LA180
LA180

4-3

(CONT.)

Operator's

paper feeding, 3-2
printer, 3-1
ribbon changing, 3-2

2-2,

console,

OPR.ATO file,
OPSER,

1-2,

4-1

2-4

2-3

Lamps,

DN92,

4-1

Line,
synchronous,

asynchronous,

Link,

synchronous,

LP05
LPT

2-1

1-2
station memory,

indicators, 3-5
switches, 3-3,

printer,
NOT...,

LPTSPL,

3-3

DECnet compatible,
Power switch, 2-2
card reader, 3-6
Power switches, 3-2
LP05, 3-3, 3-4

Printer,

4-5

LA180,

LSR,

4-2,

4-3

LXA,

4-2,

4-3

3-1

matrix,
Printers,

3-1
3-1

Protocols,

MA, 4-1
Matrix printer,

MD,

Memory,

remote

station,

4-6

remote station,
Memory fields,
DN92,

1-2

error,

4-5

Modem controller,
DP8E, 2-3
MQ, 4-3

1-1

NETLDR.INI,

2-2

Network,
DECsystem-10,

Network

1-1
software, 1-2

4-2

NEXT E, 4-2
Node, 1-1
boundary,

NSP,

1-1

2-1

CARD,

card, 3-7
Reader,
cleaning card,
Register,
status,

DDT92 error, 4-7
request-to-load, 2-2
SYSCHK error, B-1

NCL,

RDCHK-REFEED
Read check,

state,

4-1

Message,

system

1-1

3-1

4-2

examining

1-1

Ppn, 1-3, 2-3

4-5

2-3

LPTTRBL,

Pick check,
card, 3-7
Port,

1-3

alarm
power
3-4

station,

2-1

remote
2-2

LP05
LP05

2-1

1-1

Load,
downline,
Load

Paper feeding,
LA180, 3-2
Paper motion,
vertical, 3-1
PDP-8A based remote

2-1

Lines,

Remote

4-5

3-8

A-1
A-1

station,

PDP-8A based,

2-1

Remote station memory, 1-2
examining, 4-6
load, 2-2
Request-to-load message,
2-2
Restarting, 4-4
Restarting DN92 ROM,
manually, 4-3
Restarting the DN92,
Ribbon changing,
LA180, 3-2

4-1

ROM,

bootstrap, 1-2, 2-2
DN92, 4-1
manually restarting
4-3

Routing,
RUN, 4-3

Index~2

2-1

DN92,

INDEX

SET HOST, 1-2
Sign,
% (percent), 1-2,

Synchronous line, 2-1
Synchronous 1link, 2-1
SYSCHK, 1-2, 2-2, 2-3, 4-4
SYSCHK error message, B-1

2-2

Software,
network, 1-2
SPRINT, 2-3

STATE, 4-2
State register,

Station,

PDP-8A

based

Station memory,
load remote,

STATUS,

4-2

A-1
remote,

power,

2-1

System

error

THIS D,

4-2

THIS E,

4-2

TOPS-10,

4-5

1-3

TTY NOT CONNECTED,
TTY's,

3-6

2-1

Vertical

paper

2-2

Switches,
card reader
LP05 power,
power, 3-2

message,

TTY NO XMT FLAG, 1-3

2-2

Status register, A-1l
Switch,
card reader, 3-6
card reader power,

(CONT.)

panel, 3-7
3-3, 3-4

word,
DN92,

Index-3

4-1

4-5

motion,

3-1

DN92

User's
-

Guide

AA-5711A-TB

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