IBM 4331 Manual instruction

Systems
GA33-1525-1
File No.4300-01
Operator's Library:
IBM
4331 Processor
Operating Procedures
and Problem
Determination Guide
--...- -
----
- - ---
- ----
- -.. ---
------
___ _, _
-~-·
'

Second
Edition,
June
1979
Information
contained
in
this
manual
is
subject
to
change
from
time
to
time.
Any
such
change
will
be
reported
in
subsequent
revisions
or
through
the
System
Library
Subscription
Service.
This
edition
contains
minor
changes
throughout
the
whole
manual.
Important
changes
have
only
been made in
sections
'Program
Load' and 'Communication
Lines
SDLC
1•
Requests
for
copies
of
IBM
publications
should
be made
to
your
IBM
representative
or
to
the
IBM
branch
office
serving
your
locality.
A form
for
reader's
comments
is
provided
at
the
back
of
the
publication.
If
the
form
has
been removed, comments
may
be
addressed
to
IBM
Product
Publications,
Department
3179,
Schoenaicher
Strasse
220, 7030
Boeblingen/Wuertt.,
Federal
Republic
of
Germany.
IBM
may
use
or
distribute
any
of
the
information
you
supply
in
any
way
it
believes
appropriate
without
incurring
any
obligation
whatever.
You
may,
of
course,
continue
to
use
the
information
you
supply.
©
Copyright
International
Business
Machines
Corporation
1979
i i
4331
Processor
Operators
Guide

Preface
This manual describes how to operate the IBM 4331
Processor. You are assumed to have a knowledge of
Introduction to IBM Data Processing Systems, GC20-1684, and
some
experience in operating a similar computing system.
The information in this manual is organized in the
fo l l ow ing way :
•
Chapter contains emergency and first aid procedures.
• Chapter 2 describes the parts of the IBM 4331 Processor
that you need to know about in order to be able to
communicate with, and control the system. It describes
the operator console and related facilities.
• Chapter 3 explains how to operate the IBM 4331
Processor.
• Chapter 4 provides restart procedures for the IBM
5424 Multi-Function Card Unit.
• Chapter 6 of the manual contains a glossary.
iii

CONTENTS
Chapter 1. Emergency Procedures ..... .
Chapter 2. Communicating with the System ..
Operator's Console ..
Video Screen ... .
Control Panel ... .
Console Keyboard ..
Tabulator keys, Backspace key, Space bar ..
Machine Status Display .
System Diskette ....
Chapter 3. Procedures.
Loading the Diskette .
Switching Power On .....
Loading the Microcode (IML) ..
Initial Program Load .... .
Mode Selection ....... .
Errors Made During Mode Selection.
Fast Mode Selection. . . ...
Address Compare .. .
Check
Control ... .
Display/Alter.... . ....... .
Control Registers. . . . . . . ...
Current PSW. . . . . . . . .
Floating Point Registers ........... .
General Registers. . . ... .
Storage Key .... .
Main
Storage ... .
Main
Storage Size ..
Capacity Counts ...
Main Storage Real.
Main Storage Virtual
Page Description ....
Communication Lines.
Instruction Step ..
Interval Ti mer
Machine Save .
Program Load . .
Clear Reset ...... .
Reset I-Step
Program Reset.
Restart ...... .
Store Status .
TOD Enable ..
IV 4331 Processor Operators Guide
• 1 -1
. 2-1
. 2-2
. 2-3
. 2-4
. 2-6
. 2-9
. 2-14
2-20
. 3-1
. 3-2
. 3-3
. 3-4
. 3-5
. 3-6
3-8
. 3-9
. 3-11
. 3-14
. 3-16
. 3-18
. 3-19
. 3-21
. 3-22
. 3-23
. 3-24
. 3-26
. 3-27
. 3-28
. 3-30
. 3-32
. 3-34
. 3-46
3-47
. 3-48
. 3-49
. 3-53
. 3-54
. 3-55
. 3-56
3-57
3-58

Native Displays and Printers .
User
Diskette Control .. .
Diskette Device Address .. .
. .... 3-59
3-63
. . . . 3-65
Chapter 4. Operators Problem Determination
Chapter 5. Reference Information ..... .
Restart Procedures for the IBM 5424 Multi-Function
Card Unit (MFCU) ....... .
Restart Information Field ...
Operators Restart Instructions ..... .
Conversion Binary to Hexadecimal to Decimal
(Integers Only) . . . ...
Chapter 6. Glossary ..
. 4-1
5-1
. 5-1
. 5-1
5-3
5-9
. 6-1
v

•

•
Chapter 1. Emergency Procedures
General
If people are endangered, or if equipment could be damaged,
disconnect power to the system by pressing the relevant
EMERGENCY POWER-OFF switch in the computer room .
Electric Shock
1. If the casualty is still in contact with the electrical
supply:
a. Disconnect the electrical supply, or
b. Remove the casualty from contact with the
electrical supply by pulling on his i!:_y clothing.
Do not move the casualty unless it is necessary.
2. If the casualty has stopped breathing, apply
mouth-to-mouth resuscitation immediately (see
artificial respiration below).
3. Call for help.
Artificial Respiration
1. Clear throat of water, food or foreign matter.
2. Tilt head back to open air passage.
3. Lift jaw up to keep tongue out of air passage.
4. Pinch nostrils to prevent air leakage when you blow.
5. Take a deep breath. Seal your mouth around casualty's
mouth, blow until you see chest rise.
6. Remove your lips and allow lungs to empty.
7. Listen for snoring and gurglings, signs of throat
obstruction.
8. Repeat mouth to mouth breathing 10 to 20 times a m:nute.
Continue rescue breathing until casualty breathes
unaided.
Emergency Procedures 1- 1

Fi re
Do not use water to fight~ fire in electrical equipment.
Use only a fire extinguisher approved for this purpose, for
example one that contains carbon dioxide (C02). Follow the
instructions on the extinguisher and call for help.
1 -2 4331 Processor Operators Guide

Chapter 2. Communicating with the System
This section describes the parts of the IBM 4331 Processor
that you, as an operator, will use in your work.
Communicating with the System 2- 1

Operator's Console
Red Lights
On/Off Switch
The operator's console is a device used to control the IBM
4331 Processor.
It consists of:
• Video Screen - to provide information from the system,
in the form of messages and displays. The information
that you enter into the system also appears on the
screen. A permanent display of the status of the IBM
4331 Processor is shown in the lower part of the screen.
•
•
Console Keyboard - for entering commands and data into
the system.
Control Panel - with lights and buttons for functions
that cannot conveniently be handled by the keyboard and
video screen.
The operator console does not provide printed output. An
optional matrix printer may be used to supply printouts of
messages.
--- The a/ A Switch
~1--- Normal/Test Switch
Contrast Control
Brightness Control
Audible Alarm
2- 2 4331 Processor Operators Guide
4

Video Screen
The video screen displays numeric characters, alphabetic
characters and special symbols. It is equipped with an
audible alarm that alerts you to messages requiring your
attention. The format of the screen is shown below.
IAI 20 lines
I BI 5 l i nes
I Al System Area
DISPLAY FORMAT
I I
i.-----80 CHARACTERS-----+!
I I
: t
I I
I
25
ILINES
I I
I I
I i
I I
I +
I
The system area of the screen displays messages from the
system. It is also used to display the various operating
modes that can be selected.
IBI Machine Status Area
This area displays information about the status of the IRM
4331 Processor.
Communicating with the System 2- 3

Control Panel
The control panel contains lights and switches that allow
you to check and control basic machine functions. These
functions are described below.
.BASIC
CHECK SYSTEM WAIT
000
POWER IN POWER
PROCESS COMPLETE
0 0 D
c:J
AMP [!:JOWER
TEST OFF
-- --
Control Panel Lights
Basic Check
The red BASIC CHECK light indicates a failure requ1r1ng
attention by service personnel. This light is also on when
the power-service mode switch is in 'service' position. The
power-service mode switch is located in the IBM 4331
processor and can be operated only by service personnel.
System
The green SYSTEM light is on when instructions are being
processed.
Wait
The amber WAIT light is on when the wait bit in the current
PSW is set. This means that the processor is idle, that is,
not processing instructions. The setting of the wait state
is controlled by the operating system. Usually the
processor awaits the completion of data transfer from an
1/0 device. The processor leaves the wait state upon an
interruption.
Power in Process
The POWER IN PROCESS 1 ight indicates that a power-on, or
power-off sequence is in progress.
Power Complete
fhe green POWER COMPLETE light comes on when the power-on
sequence is completed.
2-4 43 31 Processor Operators Guide

Control Panel Buttons
IML
Pressing this button while power is on starts the IML
sequence.
Power Off
The POWER OFF button starts the power-off sequence. If
during power-off sequence a power failure is detected, a
reference code is displayed and the power-off sequence is
halted, however, power is not turned off. Note the
reference code for the service representative's use and
press POWER OFF a second time to complete the power-off
sequence.
The power-off sequence can also be initiated by operating
the POWER-ON/OFF toggle switch located at the right side of
the IBM 4331 Processor. Note: The power-off sequence
clears the contents of all storages. Power off is complete
after 5 - 7 seconds.
Lamp Test
The LAMP TEST button tests the control panel lights and (if
installed) the lights of the IBM 5424 (MFCU). When this
button is pressed, the check lights on the panel go on.
The 1 ights go out when the button is released.
Communicating with the System 2- 5

Console Keyboard
The console keyboard enables you to enter commands and data
into the system. It has the following layout:
Mil Function is only active when ALT key is pressed at the same time
!==i Typomatic key
The keyboard consists of three types of keys:
• Alphameric key~
• Cursor and tabulator keys, backspace key, and space bar
• Function keys
The
positions of these keys, and their functions, are
described on the following pages.
Alphameric Keys
Cursor
The a 1phamer ic keys are used to enter messages---and__datc:l,
and
to call up displays. These keys are typamatic, that
is, they repeat their function as long as they are held
down. The second character on some alphameric keys can
only be used in conjunction with the SHIFT or the ALTER
(ALTER=Keyface) key (see "Function Keys"). The position of
the alphameric keys on the keyboard is shown above.
The cursor is a light-marker on the screen that indicates
where the next character to be entered will appear.
• When a character is entered, it appears just above the
cursor.
• The cursor is automatically positioned ready for the
next entry.
• You can position the cursor manually by means of the
five cursor keys. To prevent interference to internal
2-6 4331 Processor Operators Guide

•
operations, these keys can be locked. For example,
during I ML, or when the cross indicator (see
11
Mach ine
Status Display", line 25) is on the screen; you cannot
free these keys. The system returns them to your control
when the internal operation is completed.
The five cursor keys are typamatic, which
II II •
run the cursor by holding the key down.
cursor reaches the edge of the screen, it
wraps around) to the opposite edge of the
continues moving in the same direction as
key is held down.
means you can
When the
returns (or
screen and
long
as the
• To alter data displayed on the screen, position the
cursor under the data to be changed, type in the new
data and press ENTER.
• The cursor can be moved by the space bar and the
backspace key.
Communicating with the System 2- 7

Cursor Keys
EJ
The cursor can be moved in the following ways:
CURSOR TO NEW LINE
The cursor moves to the first unprotected character
position in the next lower line, traversing all
protected lines before finally returning to the first line
with an unprotected character position.
CURSOR UP
The cursor moves upward in the same character column.
Finally it returns to the bottom of the screen and repeats
the same path upwards.
CURSOR DOWN
The cursor moves downward in the same character column.
Finally it returns to the top of the screen and repeats the
same path downwards.
CURSOR TO LEFT
The cursor moves right to left and line by line upwards.
Finally it returns to the bottom right-hand corner of the
screen and repeats the same path. The backspace key
performs the same function as the cursor-to left key.
CURSOR TO RIGHT
The cursor moves left to right and line by line downward.
Finally it returns to the top left hand corner of the
screen and repeats the same path.
2-8 43 31 Processor Operators Guide

Tabulator keys, Backspace key, Space
bar
B
These
keys
cause
the
cursor
to
move
in
the
following
ways:
TABULATOR
The
cursor
moves
right
to
the
first
unprotected
character
position.
If
held
down
it
traverses
all
first
character
positions
of
unprotected
fields
in a
left-to-right,
top-to-bottom
direction.
Finally
it
returns
to
the
leftmost
character
position
of
the
topmost
unprotected
field.
BACK TABULATOR
The
current
position
of
the
cursor
affects
the
operation
of
the
back
tabulator
key.
When
the
cursor
is
in an
input
field
at
a
location
other
than
the
first
character
location,
the
back
tabulator
key
repositions
it
to
the
first
character
position
in
the
field.
When
the
cursor
is
in
a
protected
field,
or
at
the
first
character
position
of
the
input
field,
the
back
tabulator
key
repositions
it
to
the
first
character
position
of
the
first
input
to
the
left
of
the
present
field.
Using
this
key
together
with
the
ALT
key
repositions
the
cursor
to
the
home
position,
that
is
to
the
first
unprotected
position
on
the
total
display.
BACKSPACE
rhe
cursor
moves
right
to
left
and
line
by
line
upwards.
Finally
it
returns
to
the
bottom
right-hand
corner
of
the
screen
and
repeats
the
same
path.
The
cursor-to-left
key
performs
the
same
function
as
the
backspace
key.
SPACE BAR
The
cursor
moves
to
the
right
and
inserts
a
blank
character.
Communicaimg
with
the
System
2
-9

Function Keys
fCHGl
~
MODE SEL/DIAG
Pressing MODE SEL causes the mode selection display to
appear on the screen. This display lists the available
operating modes. These modes, and how to use them, are
described in the section "Procedures".
Mode selection can be requested at any time; it does not
affect the state of the machine other than breaking into a
chain of messages that is about to be written onto the
screen (if any). The display on the screen when MODE SEL
is pressed is automatically stored by the system and can be
recalled later. Do not, however, keep this display, nor
any
other manual operations display, on the screen any
longer than necessary as, during this time, the system can
neither use the screen nor record errors.
The DIAG (diagnostic) function of this key is for service
personnel only.
CNCL
CNCL (cancel) is used to stop operations that have been
started but not completed (the ENTER key has not been
pressed). The operation is terminated according to the mode
that the screen was in when data entry started:
• If the screen was under control of the system, and if
the command set is 3270, the message or reply is
de letec.!. If the command set is 1052, the message or
reply is marked with an asterisk.
• If the screen was in manual operations mode, the display
is deleted, control returns to the system and the last
full picture that was displayed before manual operations
began is restored to the screen.
CHGDPLY
The CHG DPLY (change display) key causes the screen display
to change from the system message buffer to the manual
operations buffer, and vice versa. During manual operation,
the screen and keyboard are made available to the operating
system. During system operation the screen and keyboard
(except START, STOP and INTR) are made available for manual
operation.
INTR/LINE DISC
The INTR (interrupt) key is used to request an external
interruption.
The LINE DISC (line disconnect) function of this key is for
service personnel only.
2- 10 43 31 Processor Operators Guide

E
T .
ERASE INPUT
Pressing the ERASE INPUT key erases all input fields on the
screen. The cursor moves to the first character location
available for entering data.
ERASE EOF I SPM/O
Pressing the ERASE EOF (Erase End of Field) key erases
character positions in the input field in which the cursor
is located. All character positions from the cursor
location to the end of the field are erased. The cursor
does not move. The SPM/0 function of this key is for
service personnel only.
REQ I COMM REQ
The function of the REQ (request) key depends upon the
command set being used:
• When the 1052 command set is being used, the keyboard is
normally locked. It is freed when the system executes a
read inquiry command which is invoked by hitting the REQ
key.
• When the 3270 command set is being used, the REQ key
requests an Attention Interrupt.
The COMM REQ (communication request) function of this key
is for service personnel only.
COPY
Pressing the COPY key copies the contents of the screen
(all lines except line 25) when in MAN op mode onto the
3287 console printer (if attached).
Note: Programmed operations on the 3287 terminal printer
have priority over the COPY key function. This means that
the COPY key has no effect when the print buffer contains
data that has not yet been printed. The COPY key becomes
effective as soon as data in the print buffer has been
printed. If there is a dead-1ock (such as, the print
program hangs, or a similar error), the power switch on the
printer should be turned off and on again. This action
resets the entire print buffer and enables the COPY key
function.
SHIFT
There is a SHIFT key on each side of the keyboard. Both
SHIFT keys serve the same purpose. Pressing a SHIFT key
causes:
• The upper character of a key with two characters to be
entered.
• The upper case of an alphabetic character to be entered.
The shift symbol is displayed in line 25 when this key is
Communicating with the System 2- 11