IBM System./3 Model 15 Operator's Guide

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IBM System./3 Model 15

Operator's Guide

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Preface

T h i s m a n u a l p r o v i d e s t h e i n f o r m a t i o n y o u n e e d to o p e r a t e P r e r e q u i s i t e P u b l i c a t i o n t h e I B M S y s t e m / 3 M o d e l 1 5 . T h e m a n u a l is d i v i d e d in t o

t n r e e p a r t s : l n o r d e r t o u n d e r s t a n d a n d u s e t h i s p u b l i c a t i o n , y o u m u s t be familiar with IBM System/3 Model 15 lntroduction,

t Part l. L)evice Operation - which describes operating GC21-5094. For a list of manuals that contain additionar

p r o c e d u r e s f o r t h e M o d e l 1 5 d e v i c e s . i n f o r m a t i o n a b o u t t h e I B M S y s t e m / 3 M o d e l 1 5 , s e e th e Bibliography at the back of this book.

. Part 2. S'ystem Operation - which describes how to o p e r a t e th e M o d e l 1 5 a n d i t s d e v i c e s a s a s v s t e m . lt d e - s c r i b e s f u n c t i o n s o f t h e s y s t e m a n d h o w y o u c a n c o m - m u n i c a t e w i t h t h e s y s t e m to o b t a i n t h e d e s i r e d re s u l t s . . Part 3. Program Operation - which describes general

p r o c e d u r e s f o r c o m p i l i n g a n d e x e c u t i n g p r o g r a m s a n d s y s t e m s e r r v i c e f u n c t i o n s .

You must be familiar with Part l. Device Operation before u s i n g P a r t s 1 l a n d 3 o f t h i s m a n u a l .

y ' U o t e ; T h i s m a n u a l fo l l o w s t h e c o n v e n t i o n th a t " h e "

m e a n s " h e o r s h e . "

Fourth Edition (September 1978)

T h i s i s a m a j o r r e v i s i o n o f , a n d o b s o l e t e s , G C 2 1 - 5 0 7 5 - 2 a n d t e c h n i c a l n e w s l e t t e r s G N 2 1 - 5 5 5 3 a r r d G N 2 1 - 5 5 7 7 . C h a n g e s o r a d d i t i o n s t o t h e t e x t a n d i l l u s t r a t i o n s a r e i n d i c a l e d b y a v e i t i c a l l i n e t o t h e l e f t o f t h e c h a n g e o r addition.

T h i s e d i t i o n a p p l i e s t o t h e f o l l o w i n g I B M S y s t e m / 3 s y s t e m c o n t r o l p r o g r a m s a n d t o a l l s u b s e q u e n t v e r s i o n s a n d m o d i f i c a t i o n s u n t i l o t h e r w i s e i n d i c a t e d i n n e w e d i t i o n s o r t e c h n i c a l n e w s l e t t e r s .

Versiott Modification Program Number Model

6 0 5 7 0 4 - S C 1 1 5 A - B - C

3 0 5 7 0 4 - S C 2 1 5 D

C h a n g e s a r e p e r i o d i c a l l y m a d e t o t h e i n f o r m a t i o n h e r e i n ; b e f o r e u s i n g th i s p u b l i c a t i o n i n c o n n e c t i o n w i t h t h e o p e r a t i o n o f I B M s y s t e m s , re f e r t o the latest IBM System/3 B i b l i o g r a p h y , G C 2 0 - 8 0 8 0 , fo r t h e e d i t i o n s t h a t a r e a p p l i c a b l e and current.

U s e th i s p u b l i c a t i o n o n l y f o r t h e p u r p o s e s s t a t e d i n t h e P r e f a c e .

P u b l i c a t i o n s a r e n o t s t o c k e d a t t h e a d d r e s s b e l o w . R e q u e s t s f o r c o p i e s o f I B M p u b l i c a - t i o n s a n d f o r t e c h n i c a l in f o r m a t i o n a b o u t t h e s y s t e m s h o u l d be made to your IBM r e p r e s e n t a t i v e o r t o t h e b r a n c h o f f i c e s e r v i n g y o u r l o c a l i t y .

T h i s p u b l i c a t i o n c o u l d c o n t a i n te c h n i c a l i n a c c u r a c i e s o r t y p o g r a p h i c a l e r r o r s . A d d r e s s y o u r c o m m e n t s a b o u t t h i s p u b l i c a t i o n t o I B M C o r p o r a t i o n , P u b l i c a t i o n s . D e p a r t m e n t 2 4 5 , R o c h e s t e r ' , M i n n e s o t a 5 5 9 0 1 . I B M m a y u s e a n d d i s t r i b u t e a n v o f t h e i n f o r m a t i o n y o u s u p p l y i n a n y way it believes a p p r o p r i a t e w i t h o u t i n c u r r i n g a n y o b l i g a t i o n w h a t e v e r Y o u m a y , o f c o u r s e , c o n t i n u e to u s e th e i n f o r m a t i o n y o u s u p p l y .

O C o p y r i g h t l n t e r n a t i o n a l B u s i n e s s M a c h i n e s C o r p o r a t i o n 1 9 7 4 , 1 9 7 6 , 1 9 7 1 , 1 9 7 8

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Technlcal Newsletter

T h i s N e w s l e t t e r N o . G N 2 1 ' 5 6 6 1 D a t e 2 9 D e c e m b e r 1 9 7 8 Base Publication No. GC21-5075-3

Fite No. s3-40 previousNewsletters None

IBM System/3 Model 15

Operator's Guide

O I B M C o r p . 1 9 7 4 , 1 9 7 6 , 1 9 7 7 , 1 g 7 B

T h i s t e c h n i c a l n e w s l e t t e r a p p l i e s t o v e r s i o n 7 , m o d i f i c a t i o n 0 o f I B M S y s t e m / 3 M o d e l 1 5 S y s t e m C o n t r o l P r o g r a m (P r o g r a m N u m b e r 5 7 0 4 - S C i ) a n d p r o v i d e s re p l a c e m e n t p a g e s f o r t h e s u b j e c t p u b l i c a t i o n . 1 - h e s e r e p l a c e m e n t p a g e s r e m a i n in e f f e c t f o r s u b s e q u e n t v e r s i o n s a n d m o d i f i c a t i o n s u n l e s s s p e c i f i c a l l y a l t e r e d . P a g e s t o b e i n s e r t e d a n d / o r r e m o v e d a r e :

1 3 , 1 4 1 7 1 , 1 7 2

C h a n g e s t o t e ) : t a n d i l l u s t r a t i o n s a r e i n d i c a t e d b y a v e r t i c a l li n e a t t h e l e f t o f t h e c h a n g e .

Summary of Aimendments

M i s c e l l a n e o u s t e c h n i c a l c h a n g e s

/Vote.' Please lile this cover letter at the back of the manual to provide a record of changes.

IBM Corporation, Publications, Department 245, Rochester. Minnesota 55901

@ t e N I C o r o . 1 9 7 g p r i n t e d in U . S . A .

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a o l

Technical Newsletter

This Newsletter No. GN21-5671 Date 28 September 1979 Base Publication No. Gc21-5075-3

File No. s3-40 previous Newsletters GN21-5661

IBM Systerm/3 M o d e l 1 5

Operator':; Guide

O I BM Corp. 1974, 1976, 1977 , 1978

This technical newsletter, a part of version 4, modification 0 of IBM System/3 Model 15D System Control Program (Program 5704-SC2) and also applicable to version 7, modification 0 of IBM System/3 Model 15A-B-C System Control Program (Program 5704-SC1). provides replacement pages for the subject publication. These replacement pages remain in effect for subsequent versions and modifications unless specifically altered. Pages to be inserted and/or removed are:

i i i , iv 1 7 7 , 1 7 8

2 5 , 2 6 1 8 3 . 1 8 4

73, 74 184.1 , 184.2 (added to accommodate

89, 90 new and moved text)

1 3 7 , 1 3 8 2 0 5 , 2 0 6

147 through 158 206J , 206.2 (added to accommodate

1 5 8 . 1 , 1 5 8 . 2 (a d d e d t o a c c o m m o d a t e n e w a n d m o v e d t e x t ) n e w a n d m o v e d t e x t ) 2 1 5 , 2 1 6

1 59 thro'ugh 168 237 , 238

168.1, 1 68.2 (added to accommodate 238.1 , 238.2 (added to accommodate

new and moved text) new and moved text)

1 6 9 , 1 7 0 2 6 7 th r o u g h 2 7 0

170.1 , 170.2 (added to accommodate 270.1 , 270.2 (added to accommodate

new and moved text) new and moved text)

1 7 1 t h r c , u g h 1 7 4 2 1 1 , 2 7 2 174.1 , 174.2 ladded to accommodate 275 through 296

new and moved text)

Changes to text and illustrations are indicated by a vertical line at the left of the change.

Summary of Amendments

o A d d i t i o n o f t h e m u l t i p l e l o b / s t e p m a n i p u l a t i o n f u n c t i o n (c h a r a c t e r s * * o p e r a n d ) t o t h e C , A N C E L , C H A N G E , H O L D , K E E P . a n d R E L E A S E c o m m a n d s

o A d d i t i o n o f t h e t a s k h i s t o r y d i s p l a y f u n c t i o n (t a s k o p e r a n d ) t o t h e D I S P L A Y c o m m a n d o Addition of information in the system status and queue displays

o A d d i t i o n of the HIPTY command

o A d d i t i o n of the $HACCP i n v o c a t i o n f u n c t i o n ( C C P o p e r a n d ) a n d th e S H A w a r n i n g p o i n t fu n c t i o n ( t r a c k s o p e r a n d ) t o t h e H A L T c o m m a n d

lVote: Please file this cover letter at the back of the manual to provide a record of changes.

IBM Corporation, Publications, Department 245, Rochester, Minnesota 55901

@ t B M , 3 6 r p . 1 9 7 g P r i n t e d i n U ' S ' A '

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P a g e o f G C 2 1 - 5 0 7 5 - 3 l s s u e d 2 8 S e o t e m b e r 1 9 7 9 B y T N L : G N 2 1 - 5 6 7 1

o Communicating w i t h t h e s y s t e m v i a th e C R T / K e y b o a r d ' This bo,ok is divided into three parts' Part 1 describes devices you have on the system and how to operate them' Y o u s h o u l d b e fa m i l i a r w i t h P a r t 1 b e f o r e g o i n g o n t o P a r t s 2 and 3. Part 2 describes how to operate the system c o m p o s e d o f t h e d e v i c e s d e s c r i b e d i n P a r t 1 ' P a r t 3 g i v e s general procedures for operating programs on the Model 1 5' Althoul3h partition 3 (P3) and 3344 Direct Access Storage are discussed throughout this manual, they are supported only b1' the System Control Program Number 5704-SC2' The I BM Svstem/3 Modet | 5 lntroduction , GC2 1 -5094' gives you a good overview of what the system is' Certain sections of this operator's guide assume that you have read t h e I n t r o d u c t i o n .

Y o u r R o l e A s A n O p e r a t o r

J O B D O C U M E N T A T I O N

l n f o r m a t i o n c o n c e r n i n g t h e n a t u r e o f e a c h p r o g r a m a n d what is required of you as the operator to run that program m u s t b e s u p p l i e d b y t h e p r o g r a m m e r ' T h i s in f o r m a t i o n c a n b e p r o v i d e d t o y o u o n a p r o g r a m r u n s h e e t '

A sample program run sheet is shown on the next two pages' T h e s a m p l e r u n s h e e t s h o w s :

o T h e d i s k c a r t r i d g e o r t a p e re e l t o m o u n t ' o T h e fo r m s to u s e in t h e P r i n t e r '

o T h e in P u t d e v i c e t o u s e '

o The operation control language (OCL) statements used and any operator control commands (OCC) necessary' a Any special procedures that are not normally performed

but necessarY with this Program' o Programmed halts to be used.

U S I N G T H E M A C H I N E C O V E R S F O R S A F E T Y

B e s i d e s i m p r o v i n g a p p e a r a n c e , c o v e r s o f I B M m a c h i n e s h a v e been designed to protect you against possible injury during o p e r a t i o n . W h i l e s o m e h a z a r d s , s u c h a s m o v i n g m e c h a n i c a l parts, are obvious, others are not' Electrical potential and acoustical noise are in the latter category'

T h e fr a m e s o f a l l I B M e q u i p m e n t h a v e b e e n m a d e e l e c t r i c - ally safe by recommended grounding practices' Covers have been designed to reduce noise levels to a more com- fortable range.

I B M m a i n t a i n s v i g o r o u s a t t e n t i o n t o s a f e t y o n a l l it s m a c h i n e s ' However, the effectiveness of this effort is lessened when Vou fail to keep the covers closed while the system is run- ning. Operation with the covers ooen causes needless . * p o r u r . t o u n s e e n h a z a r d s . B e c a u s e o f t h i s ' I B M s t r o n g l y r e c o m m e n d s t h a t a l l p e o p l e w o r k i n g w i t h t h e e q u i p m e n t follow thesimplesafety-first procedures of keeping all covers closed while the system is operating'

v i i

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I B M S Y S T E M / 3 M O D E L 1 5 S A M P L E P R O G R A M R U N S H E E T P r o g r a m N a m e

Programnter

P r o g r a m N u m b e r - A p p l i c a t i o n

Job Description J o b n a m e : S t e p n a m e :

Job Preparation C a r d : A u x . C a r d : D i s k o r T a p e :

D e s c r i p t i o n a n d S o u r c e o f C a r d F i l e s H o p p e r 1

H o p p e r 2 H o p p e r 1

R 1 R 2 F 1 F 2 D 1 D 2 D3 or D31 D32 D33 D34 D4 or D41 D42 Drt3 D44 T 1 T2 T3 T4

N u m b e r N a m e N u m b e r

D e s c r i p t i o n o f D i s k o i f m

t i o n o f F o r m P r i n t e r :

A u x . P r i n t e r : Job Setup

D e v i c e s R e q u i r e d B y

Card Disk

Program Tape

l - , 1 f

I ' - t I

lrsl_l

mn

H a l t D e f a u l t S e v e r i t v M F C U 1

M F C U 2 M F C M 1 M F C M 2 1442

2 5 0 1

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2

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M a x P r o g r a m S i z e E s t i m a t e d R u n T i m e

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P r o g r a m m e d M e s s a g e s / H a l t s

H a l t C o d e M e s s a g e / H a l t M e a n i n g R e s p o n s e o r A c t i o n R e q u i r e d

Job Complletion C a r d :

D i s k o r T a p e :

P r i r r t e r : B u r s t ? - D e c o l l a t e ? -

O C C o r O C L C o n s i d e r a t i o n s / S p e c i a l I n s t r u c t i o n s

D e s t i n a t i o n o f C a r d F i l e s

D i s p o s i t i o n o f D i s k o r T a p e V o l u m e s S t a c k e r 1

Stacker 2 Stacker 3 Stacker 4 Stacker 5

R 1 R 2 F 1 F 2 D 1 D2 D3 or D31 D32 D33 D34 D4 or D41 D42 D43 D44 T 1

T2 T3 T4

D i s t r i b u t i o n o f F o r m s

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Part 1. Device Operation

D e v i c e O p e r a t i o n 1

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o System Controls and lndicators a System Control Panel

o Processing Unit Display Panel

o Emergency Power Off and Meter Panel . 5/,44 Disk Panel

a B i n a r y S y n c h r o n o u s C o m m u n i c a t i o n s A d a p t e r P a n e l o Local Communications Adapter Panel

a Customer Engineer Control Panel

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chapter 1. !BM 5415 Processing unit controls and Indicators

+-Processing Unit

i8gEEg:gei*i: i,

I B M 5 4 1 5 P r o c e s s i n g U n i t C o n t r o l s a n d I n d i c a t o r s 3

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S Y S T E M C O N T R O L S A N D I N D I C A T O R S

E a c h S y s t e m / 3 p r o c e s s i n g u n i t h a s l i g h t s , k e y s , a n d s w i t c h e s t h a t a r e u s e d f o r c o m m u n i c a t i o n b e t w e e n y o u a n d the s y s t e m . L i g h t s i n d i c a t e c o n d i t i o n s e x i s t i n g i n a d e v i c e o r i n t h e s y s t e m . K e y s a n d s w i t c h e s a r e u s e d t o c o n t r o l o p e r a - t i o n o f t h e s y s t e m . F u n c t i o n s o f t h e l i g h t s , k e y s , a n o s w i t c h e s o n t h e p r o c e s s i n g u n i t a r e d i s c u s s e d i n t h i s c h a p t e r . C o n t r o l s a n d in d i c a t o r s f o r t h e p r o c e s s i n g u n i t a r e lo c a t e d o n a l a r g e p a n e l c a l l e d t h e c o n s o l e ( F i g u r e 1 ) . A l t h o u g h t h i s p a n e l i s d i v i d e d i n t o s e v e r a l s m a l l e r p a n e l s , y o u w i l l be c o n c e r n e d p r i m a r i l y w i t h t h e s y s t e m c o n t r o l p a n e l a n d th e d i s k p a n e l . T h e p r o c e s s i n g u n i t d i s p l a y p a n e l a n d c u s t o m e r e n g i n e e r c o n t r o l p a n e l a r e u s e d p r i m a r i l y b y t h e I B M C u s t o m e r E n g i n e e r w h e n h e s e r v i c e s t h e s v s t e m .

Customer E n g i n e e r Control Panel - ( b e h i n d cover)

Processi ng Unit Display -.>

Panel

D i s k P r n . l -

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Emergency Power Off a n o

Meter Panel

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System

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Panel B S C A ( o r

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F i g u r e 1 . S y s t e m C o n s o l e Controls

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S Y S T E M C O N T R O L P A N E L

The controls and indicators on the system control panel ( F i g u r e 2 ) a s w e l l a s th o s e o n t h e u n i t r e c o r d d e v i c e p a n e l s and the CRT/keyboard are the means by which you operate t h e s y s t e m .

Figure2, System Control Panel

Message Display llnit: This two'position display unit at the top of the system control panel displays messages when the CRT canrrot be used. lThe IBM System/3 Model 15 System

Messages, GC21-5076, lists all Model 15 program messages')

PROGRAM LOAD Kev: This key is used when you per- f o r m t h e I P L ( i n i t i a l p r o g r a m l o a d ) p r o c e s s . T h i s k e y i s pressed after you have selected the device from which you w i l l p e r f o r m l P L . W h e n y o u p r e s s t h i s k e y , th e I P L p r o g r a m begins and the programs necessary to run your iobs are loaded into storage.

PROCESSOR CHECK Light: fhis light comes on when c e r t a i n e r r o r s o c c u r in t h e p r o c e s s i n g u n i t . T h e e r r o r is d i s p l a y e d o n t h e p r o c e s s i n g u n i t d i s p l a y p a n e l ' A l l p r o c e s s o r c h e c k s a r e re s e t a n d P R O C E S S O R C H E C K t u r n s o f f w h e n y o u p e r f o r m t h e I P L P r o c e s s .

POWER ON/OFF Switch: This switch controls power to a l l u n i t s o n t h e s y s t e m . lt i s e f f e c t i v e w h e n ( 1 ) th e E M E R G E N C Y P U L L s w i t c h i s in i t s n o r m a l p o s i t i o n , ( 2 ) t h e T H C H K ( t h e r m a l c h e c k ) i n d i c a t o r i s n o t o n , a n d ( 3 ) t h e P W B C H K ( p o w e r c h e c k ) i n d i c a t o r i s n o t o n ' ( T h e t h e r m a l and power check indicators are located on the processing u n i t d i s p l a y p a n e l . )

W h e n t h i s s w i t c h i s t u r n e d o n , a s y s t e m r e s e t i s p e r f o r m e d s o th a t n o l / O o p e r a t i o n s a r e p e r f o r m e d u n t i l e x p l i c i t l y d i rected.

t/O ATTENTION Light: This light can come on when the program requests any input/output device to do something a n d th a t d e v i c e i s n o t r e a d y t o d o i t . U s u a l l y t h i s c o n d i t i o n w i l l c a u s e a n e r r o r m e s s a g e t o b e d i s p l a y e d '

A d d i t i o n a l i n d i c a t o r s o n t h e d e v i c e g u i d e y o u t o t h e e x a c t c a u s e o f a n o t - r e a d y c o n d i t i o n . l/ O A T T E N T I O N g o e s o f f w h e n th e c o n d i t i o n i s q o r r e c t e d ' I n s t r u c t i o n s f o r c o r r e c t i n g t h e v a r i o u s c a u s e s o f l / O A T T E N T I O N a r e in c l u d e d i n Part 2. SYstem OPeration.

START Key: When you press START. it allows the system t o c o n t i n u e n o r m a l o p e r a t i o n . U s e S T A R T o n l y ( 1 ) a f t e r a p r o g r a m m e d h a l t h a s b e e n d i s p l a y e d i n t h e m e s s a g e d i s p l a y unit or (2) after you have pressed console STOP' Do not press START at any other time.

STOP Key/Lighf: When you press STOP, it causes the svstem to stop after completing the current operation' The STOP light comes on as soon as processing stops' You re- start the system by pressing START'

I B M 5 4 1 5 P r o c e s s i n g U n i t C o n t r o l s a n d I n d i c a t o r s 5

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P R O C E S S I N G U N t T D I S P L A Y P A N E L

T h e l i g h t s o n t h i s p a n e l ( F i g u r e 3 ) i n d i c a t e sVstem sratus a n d a r e m a i n l y f o r u s e b y t h e I B M Customer Englneer.

ADDRESS,/DATA Switches: These switches are used to specify an address or data. Switch settings can be tested b y t h e p r o g r a m in o p e r a t i o n , c a n b e e n t e r e d into storage, o r c a n c a u s e a s t o r a g e l o c a t i o n to b e d i s p l a y e d b y t h e r e g i s t e r d i s p l a y u n i t .

L A M P T E S T K e y : W h e n y o u p r e s s t h i s k e y , a l l i n d i c a t o r l i g h t s o n a l l u n i t s o n t h e s y s t e m c o m e on.

Register Display Unit: This display unit consists of a row o f 2 0 l i g h t s a n d a n 8 - p o s i t i o n ro t a r y s w i t c h . The lights d i s p l a y p r o r : e s s i n g u n i t s t a t u s a n d c o n t e n t s o f m a i n r e g i s t e r s ( i n t e r m e d i a t e s t o r a g e a r e a s ) . A n y o f e i g h t d i f f e r e n t a r e a s c a n b e s e l e c l e d f o r d i s p l a y . I n f o r m a t i o n o n h o w t o use the

r e g i s t e r d i s p l a y u n i t i s c o n t a i n e d in p a r t 2 o f t h i s m a n u a t . Cycle Contn>l Display: fhe 12 indicator lights labeled M A C H I N E C Y C L E a n d t h e 1 0 i n d i c a t o r li g h t s labeted C L O C K i d e n t i f y t h e p r o c e s s i n g c y c l e j u s t c o m p l e t e d .

I N T L E V L i g h t : T h i s l a m p t u r n s o n w h e n an interrupt level i s b e i n g s e r v i c e d .

TH CHK Light: Ihe TH CHK light turns on whenever the t e m p e r a t u r e o f t h e p r o c e s s i n g u n i t o r t h e p r i n t e r o r M F C M e l e c t r o n i c s e x c e e d th e l i m i t s e t f o r n o r m a l o p e r a t i o n . p o w e r i n t h e s y s t e m s h u t s o f f a n d t h e T H C H K and pWR CHK ( p o w e r c h e c k ) l i g h t s turn on. For recovery proceoures, s e e Restoring System Power in part 2.

PWR CHK Light: The PWR CHK light turns on bv:

1 . L o s s o f v o l t a g e o r o v e r v o l t a g e c o n d i t i o n i n t n e p r o c _ e s s i n g u n i t . ( T h e T H C H K l i g h t i s n o t o n . )

2 . T h e r m a l c o n d i t i o n s in t h e p r o c e s s i n g u n i t o r t h e p r i n t e r o r M F C M e l e c t r o n i c s . ( T h e TH CHK light i s o n . )

In both cases power in the system shuts off. For recovery procedures, see Restoring System power in part2.

t u & G

F i g u r e 3 . P r o c e s s i n g U n i t D i s p l a y p a n e l

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E M E R G E N C Y P O W E R O F F A N D M E T E R P A N E L

EMERGEIUCY PULL Switch: This switch (Figure 4), as its n a m e i m p l i e s , s h o u l c l b e u s e d o n l y u n d e r u n u s u a l c i r c u m - s t a n c e s . O n c e t h e E I V I E R G E N C Y P U L L s w i t c h i s p u l l e d , s v s t e m p o w e r c a n n o t b e tu r n e d o n u n t i l th e I B M c u s t o m e r E n g i n e e r f r a s r e s e t t h e s w i t c h . I n f o r m a t i o n i n s t o r a g e i s d e s t r o y e d w h e n th i s s w i t c h i s u s e d . D a t a o n d i s k s c a n a l s o b e d e s t r o y e d b y t h i s o P e r a t i o n .

Usage Meter: This meter (Figure 4) records the time used to process programs and data. The meter records all t h e t i m e th a t t h e p r o c e s s i n g u n i t is i n o p e r a t i o n .

Figure 4, Emergency Power Off and Meter Panel

f B M 5 4 1 5 P r o c e s s i n g U n i t C o n t r o l s a n d I n d i c a t o r s 7

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M O D E L 1 5 8 , 1 5 C , O R 1 5 D D I S K P A N E L

T h e M o d e l 1 5 8 , 1 5 C , or 15D disk panel (Figure 5 ) c o n s i s t s of a rotary switch (to indicate the initial program load d e v i c e ) . P o s i t i o n s D I S K 3 F 1 a n d DISK 3 Rl are avaitable on Model 15D having 3344 Direct Access Storage only.

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F i g u r e 5 ( P a r t 1 of 21. Disk panel

PROGRAM LOAD SELECTOR Switch Modet tSB, tSC. or /5D; This rotary switch is used to select the unit from w h i c h y o u in i r i a t e t P L . D I S K 1 F l . D I S K 1 R 1 , D I S K 3 F 1 , a n d D I S K 3 R 1 d e n o t e t h e s i m u l a t i o n a r e a s a s s o c i a t e d with each volume. The ALTERNATE position refers to t h e c a r d u n i t o n y o u r system t h a t c a n b e u s e d f o r l p L .

M O D E L 1 5 A D I S K P A N E L

T h e M o d e l 1 5 A d i s k p a n e l (F i g u r e S ) c o n s i s t s o f a r o t a r y s w i t c h (t o i n d i c a t e t h e i n i t i a l p r o g r a m l o a d d e v i c e ) a n d c o n t r o l s a n d in d i c a t o r s t h a t c o n t r o l t h e d i s k a n d in d i c a t e the status of the disk.

F i g u r e 5 ( P a r t 2 ot 2). Disk panel

PROGRAM LOAD SELECTOR Switch, Model tSA: This rotary switch is used to select the unit from which you i n i t i a t e l P L . T h e F T X E D D t S K a n d R E M O V A B L E D t S K p o s i t i o n s r e f e r t o d r i v e 1 o n l y ( t o p d r a w e r ) . The ALTER_

NATE position refers to the card unit on your system that c a n b e u s e d f o r l P L .

START/STOP Switches, Model l5A: These switches (one for each drive) turn the disk drive power on or off when system power is on. With the switch at OFF and the

OPEN light on, the drawer can be opened and the removable disk can be replaced.

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BEADY' Lights, Model l5A: These lights (one for each disk drive) are on when the drive is ready for use. lf you try to u s e t h e d r i v e b e f o r e t h i s li g h t is o n . t h e l / O A T T E N T I O N l i g h t o n t h e c o n s o l e t u r n s o n .

OPEN Lights, Model /54: These lights (one for each disk d n i v e ) i n d i c a t e t h a t th e a s s o c i a t e d d i s k d r i v e d r a w e r c a n b e o p e n e d { o r c h a n g i n g t h e r e m o v a b l e d i s k . T h i s li g h t is o n when the START,/STOP switch is placed at STOP and the d i s k h a s c o m e to a s t o p .

B S C A (B I N A R Y S Y N C H R O N O U S C O M M U N I C A T I O N S A D A P T E R ) P A N E L

T h e B S C A (b i n a r y s y n c h r o n o u s c o m m u n i c a t i o n s a d a p t e r ) p a n e l ( F i g u r e 6 ) c o n t a i n s l i g h t s t h a t i n d i c a t e t h e s t a t u s o f tr:lecommunication processing and a switch to control the rate of data transmission.

F i g u r e 6 . B S C A P a n e l

Lights

T h e fo l l o w i n g t e x t d e s c r i b e s t h e l i g h t s y o u a r e c o n c e r n e d w i t h w h e n ru n n i n g B S C A p r o g r a m s :

B S C A A T T N . ' T h i s li g h t tu r n s o n w h e n B S C A i s a d d r e s s e d a n d o n e o f t h e f o l l o w i n g c o n d i t i o n s i s p r e s e n t :

o A d a t a s e t is n o t r e a d y w h e n a m o d e m c o n n e c t i o n i s used, or the attached device is not ready when a modem i s n o t u s e d ( E l A l o c a l a t t a c h m e n t ) .

o A u t o c a l l u n i t p o w e r is o f f . o D a t a li n e is b e i n g u s e d . o B S C A is d i s a b l e d .

o E x t e r n a l t e s t s w i t c h i s i n t h e T E S T p o s i t i o n a n d B S C A i s n o t i n t h e t e s t m o d e .

T h e l / O A T T E N T I O N li g h t o n t h e c o n s o l e i s a l s o o n w h e n ' e v e r t h e B S C A A T T N l i g h t is o n .

D T T E R M R E A D Y : T h i s li g h t tu r n s o n w h e n B S C A i s e n - a b l e d a n d th e d a t a te r m i n a l r e a d y l i n e to t h e m o d e m i s o n .

D T S E T R E A D Y : T h i s li g h t tu r n s o n w h e n th e d a t a s e t ready line from the data set is on and the data set is ready f o r u s e .

TEST MODE.' This light turns on when a program places B S C A i n t h e t e s t m o d e o f o p e r a t i o n . T h e li g h t is u s e d o n l y w h e n d i a g n o s t i c P r o g r a m s a r e ru n .

E X T T E S T S W : F o r m e d i u m s p e e d d a t a s e t s , t h i s li g h t t u r n s o n w h e n th e s w i t c h o n t h e c a b l e i s i n t h e T E S T p o s i - tion. For high-speed data sets or for 1 200 BPS integrated m o d e m f e a t u r e , t h i s li g h t is o n w h e n th e B S C A L O C A L T E S T s w i t c h o n t h e C E p a n e l i s in t h e O N p o s i t i o n . T h i s l i g h t is u s e d o n l y w h e n d i a g n o s t i c p r o g r a m s a r e ru n .

TSM MODE: This light turns on whenever data is being transmitted.

I B M 5 4 1 5 P r o c e s s i n g U n i t C o n t r o l s a n d I n d i c a t o r s I

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C L E A R T O SEND: This light turns on to indicate t h a t th e BSCA hardware may now transmit.

TSM TRIGGEB.. This light indicates the instanraneous v a l u e o f t h e d a t a b e i n g t r a n s m i t t e d . T h e li g h t is o n when a space (a binary zero) is being transmitted on the communica_

t i o n l i n e .

RECEIVE IWODE: This light turns on when a receive opera_

t i o n i s ta k i n g p l a c e .

CHAR PHASE: This light turns on when BSCA has estab- l i s h e d c h a r a c t e r s y n c h r o n i s m w i t h t h e t r a n s m i t t i n g s t a t i o n and is receiving data. The right is turned off when character synchronism is lost or when receive operations have ended.

RECEIVE TBIGGER: This light indicates the instantaneous v a l u e o f t h e d a t a b e i n g r e c e i v e d . T h e li g h t is o n wnen a space ( a binary zero) is being received on the communica- t i o n l i n e .

R E C E I V E l N l T l A L : T h i s li g h t turns on at the initiation o f a r e c e i v e o p e r a t i o n a n d tu r n s o f f a t the end of the initia- t i o n o p e r a t i o n .

E U S Y : T h i s li g h t turns on when BSCA is executrng a r e c e i v e i n i t i a l . t r a n s m i t a n d r e c e i v e , a u t o c a l l , r e c e i v e o n l y , o r l o o o test (diagnostic mode) operation.

UNIT CHECK; This light turns on when the BSCA program should enter an error recovery procedure. When this indicator i s o n , th e l / O CHECK light on the CE control panel is also o n .

CONTROL MODE: This light is only on systems that have t h e m u l t i p o i n t t r i b u t a r y n o n s w i t c h e d n e t w o r k f e a t u r e i n _ s t a l l e d . T h e li g h t tu r n s o n when an EOT sequence i s d e t e c t - e d in a t r a n s m i t , r e c e i v e , o r r e c e i v e i n i t i a l m o n i t o r operatron.

I t t u r n s o f f w h e n an SOH or STX is decoded.

D A T A M O D E . ' This light turns on during a transmit or receive operation when data is being checked for errors. lt t u r n e d o f f a t t h e e n d o f t h e transmit o r r e c e i v e o p e r a t i o n .

DIGIT PRESEl/t This light is only on systems that have t h e a u t o c a l l f e a t u r e i n s t a l l e d . T h i s li g h t tu r n s on when a d i g i t is b e i n g p r e s e n t e d b y B S C A t o t h e a u t o c a l l u n i t .

ACU PWR OFF: This light turns on when the power for t h e a u t o c a l l u n i t i s o f f .

C A L L R E O U F S L This light turns on when an autocall o p e r a t i o n i s b e i n g p e r f o r m e d .

DT LINE lN USE: This light turns on when autocall is be_

ing performed, or TALK has been pressed on the Data- P h o n e r w h i l e th e p h o n e is off the receiver.

Switches

RATE SELECT: This switch is only on systems that have the rate select feature installed. The switch controls the rate at which data is transmitted and received. The switch m u s t b e s e t s o th e transmission r a t e o f b o t h t e r m i n a l s i s i d e n t i c a l .

D I S P L A Y S E L E C T : This switch is present o n l y o n s y s t e m s t h a t h a v e t w o c o m m u n i c a t i o n a d a p t e r s ( B S C A _ l a n d

B S C A - 2 ) . T h i s s w i t c h l e t s y o u d i s p l a y t h e i n d i c a t o r s o f e i t h e r c o m m u n i c a t i o n a d a p t e r b u t n o t b o t h a t t h e same t i m e . T h i s s w i t c h d o e s n o t c o n t r o l th e B S C A ATTN liqhts.

I T r a d e m a r k of the American Telephone & Telegraph Co.

i s

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L C A ( L O C A L C O M M U N I C A T I O N S A D A P T E R ) P A N E L T h e L C r \ ( l o c a l c o m m u n i c a t i o n s a d a p t e r ) p a n e l ( F i g u r e 7 ) cclntainsi the lights and a switch to indicate the status of l o c a t i o n c o m m u n i c a t i o n p r o c e s s i n g .

F i g u r e 7 . L C A P a n e l

Lights

T h e f o l l o w i n g d i s c u s s i o n d e s c r i b e s t h e l i g h t s y o u a r e c o n - c e r n e d w i t h w h e n r u n n i n g L C A p r o g r a m s .

L.CA Alilf; This light turns on when LCA is addressed

a n d o n e o f t h e f o l l o w i n g c o n d i t i o n s is p r e s e n t : o T h e a t t a c h e d d e v i c e is n o t r e a d y .

o L C A i s d i s a b l e d "

o E x t e r n a l te s t s w i t c h i s i n t h e T E S T p o s i t i o n a n d L C A i s n o t i n t h e t e s t m o d e .

T h e l / O A T T E N T I O N li g h t o n t h e c o n s o l e i s a l s o o n w h e n - e v e r t h e L C A A T T N l i g h t is o n .

D T T E R M R E A D Y : T h i s li g h t tu r n s o n w h e n L C A i s e n - a b l e d a n d th e d a t a te r m i n a l r e a d v l i n e fr o m L C A i s o n .

D T S E T R E A D Y : T h i s li g h t tu r n s o n w h e n th e d a t a s e t ready line from the attached device is on and the attached d e v i c e i s r e a d y .

TEST MODE.' This light turns on when a program places L C A i n t h e t e s t m o d e o f o p e r a t i o n . T h e li g h t is u s e d o n l y w h e n d i a g n o s t i c p r o g r a m s a r e ru n .

EXT TEST SW: fhis light turns on when the switch on the c a b l e i s i n t h e T E S T p o s i t i o n . T h i s li g h t is u s e d o n l y w h e n d i a g n o s t i c p r o g r a m s a r e ru n .

T S M M O D E : T h i s li g h t tu r n s o n w h e n e v e r d a t a is b e i n g transm itted.

C L E A R T O S E N D : L C A h a r d w a r e m a y

T h i s l i g h t t u r n s o n t o i n d i c a t e th a t t h e n o w t r a n s m i t .

T S M T R I G G E F . ' T h i s l i g h t i n d i c a t e s t h e i n s t a n t a n e o u s v a l u e o f t h e d a t a b e i n g tr a n s m i t t e d . T h e l i g h t i s o n w h e n a s p a c e (a b i n a r y z e r o ) i s b e i n g tr a n s m i t t e d o n t h e c o m m u n i - c a t i o n l i n e .

RECE IVE MODE: This light turns on when a receive opera- t i o n i s t a k i n g p l a c e .

CHAR PHASE: This light turns on when LCA has estab- l i s h e d c h a r a c t e r s V n c h r o n i s m w i t h t h e t r a n s m i t t i n g s t a t i o n a n d i s r e c e i v i n g d a t a . T h e l i g h t i s t u r n e d o f f w h e n c h a r a c t e r s y n c h r o n i s m is l o s t o r W h e n r e c e i v e o p e r a t i o n s h a v e e n d e d .

R E C E I V E T R I G G E R : T h i s l i g h t i n d i c a t e s t h e i n s t a n t a n e o u s v a l u e o f t h e d a t a b e i n g r e c e i v e d . T h e l i g h t i s o n w h e n a space (a binary zero) is being received on the communication l i n e .

I B M 5 4 1 5 P r o c e s s i n g U n i t C o n t r o l s a n d I n d i c a t o r s 1 1

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R E C E ' I V E ll \ i l T l A L : T h i s l i g h t turns on at the Initiation o f a r e c e i v e o p e r a t i o n a n d t u r n s o f f at the end of the i n i t i a t i o n o p e r a t i o n .

E U S Y : T h i s l i g h t t u r n s o n when LCA is executrng a receive i n i t i a l , t r a n s r r r i t a n d r e c e i v e , a u t o c a l l , re c e i v e o n t y , o r l o o p t e s t ( d i a g n o s l i c m o d e ) o p e r a t i o n .

U N I T C H E C K . ' T h i s l i g h t turns on when the LCA program s h o u l d e n t e r a n e r r o r r e c o v e r y p n o c e d u r e . When this indi- c a t o r is o n , t h e l / O C H E C K l i g h t o n t h e C E p a n e t is a l s o on.

D A T A M O D , t : T h i s l i g h t turns on during a transmit or r e c e i v e o p e r a l i o n w h e n d a t a i s b e i n g checked for errors. lt i s t u r n e d o f f a t t h e e n d o f t h e transmit or receive operatton.

Switches

D I S P L A Y S E L E C T : T h i s s w i t c h is present only on svstems t h a t h a v e tw o c o m m u n i c a t i o n adapters (LCA and BSCA-2).

T h i s s w i t c h l e r t s y o u d i s p l a y th e i n d i c a t o r s of either com_

m u n i c a t i o n a r l a p t e r b u t n o t both at the same time. This s w i t c h d o e s n o t c o n t r o l t h e B S C A / L C A ATTN lights.

C U S T O M E R H N G I N E E R C O N T R O L P A N E L

T h e s w i t c h e s , l i g h t s a n d d i a l s o n t h i s p a n e l ( F i g u r e g ) are u s e d p r i m a r i l y b y t h e I B M C u s t o m e r Engineer to service t h e s y s l e ' n .

CE Switches

> 64K ADDR BIT: This switch is set at 1 when atter, d i s p l a y , o r a d d r e s s c o m p a r e o p e r a t i o n s a r e r e q u i r e d o n a d d r e s s e s a b o v e 6 4 K .

> l28K ADDR BIT: This switch is set at 1 when atter.

d i s p l a y , o r a d d r e s s c o m p a r e o p e r a t i o n s a r e r e q u i r e d o n a d d r e s s e s a b o v e 1 2 8 K .

S A R D I S P L A Y . . T h i s s w i t c h controls the disptay in roller p o s i t i o n 1 . W h e n the switch is in the SAR position. the d i s p l a y s h o w s th e t r a n s l a t e d , o r l o g i c a l , a d d r e s s . W h e n t h e s w i t c h i s i n t h e M S A R p o s i t i o n , the display shows the actual a d d r e s s u s e d in m a i n s t o r a q e . _

l/O OVERLAP.. This switch enables rhe IBM Customer E n g i n e e r t o c o n t r o l s y s t e m in p u t / o u t p u t operat,ons. When t h e s w i t c h i s a t t h e n o r m a l ON position, l/O operations are p e r f o r m e d w h i l e the processing u n i t i s d o i n g o t h e r o p e r a _ t i o n s . W h e n t h i s s w i t c h i s at OFF, each l/O operation must b e c o m p l e t e d b e f o r e a n y other processing c a n b e d o n e .

F I L E W R I T E . ' W h i l e t h i s switch is at ON. write operatrons can [e psrfepmed on the 5444 Disk Storage Drives.

D I S P L A Y C H K 8 / I S . - W h e n in the ON position. this s w i t c h c a u s e s t h e s i x m e m o r y c h e c k b i t s f o r the currenflv a d d r e s s e d h a l f - w o r d to b e d i s p l a y e d in the O register. This s w i t c h i s f o r t h e I B M c u s t o m e r e n g i n e e r . s u s e w h e n u s r n q t h e d i s p l a y s t o r a g e m o d e .

F i g u r e 8. Customer Engineer Control panel

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P a g e o f G C 2 1 - 5 0 7 5 - 3 l s s u e d 2 9 D e c e m b e r 1 9 7 8 B y T N l - : G N 2 1 - 5 6 6 1

B T S C A L O C A L T E S T : T h i s s w i t c h i s u s e d f o r t e s t i n g h i g h - l n d i c a t o r L i g h t s s p e e d d a t a s e t s o r t h e 1 2 0 0 B P S In t e g r a t e d M o d e m F e a t u r e

o n B S C A - 1 o r B S C A - 2 . F o r n o r m a l o p e r a t i o n , t h e s w i t c h i s

i n t h e O F F p o s i t i o n . T h e s w i t c h i s u s e d o n l y i n d i a g n o s t i c A D D R E S S C O M P A R E : T h i s li g h t tu r n s o n w h e n an address n'rode to cause data to be looped from transmit to receive compare occurs (see ADDBESS COMPARE Switchesl . trigger:i r:f BSCA.

l/O CHECK: This light turns on when certain errors occur l / O C H E C K : W h e n t h i s s w i t c h i s s e t a t S T O P , t h e p r o c e s s - i n a n i n p u t o r o u t p u t d e v i c e . lt i s turned off when the i n g u n i t c o m e s t o a n i m m e d i a t e s t o p w h e n e v e r c e r t a i n i n p u t S Y S T E M R E S E T k e y o r C H E C K R E S E T k e y is p r e s s e d , o r o r o u t F r r - x t e r r o r s o c c u r . T h e s y s t e m d i s p l a y s t h e n s h o w t h e t h e i n p u t / o u t p u t d e v i c e e r r o r c o n d i t i o n i s c o r r e c t e d . s t a t u s o { t h e s y s t e m a t t h e t i m e o f t h e e r r o r . T h i s s w i t c h

i s n o r r r a l l y s e t a t R U N , a n d t h e s y s t e m d o e s n o t s t o p w h e n a n l / O e r r o r o c c u r s u n l e s s i n s t r u c t e d t o d o s o b y t h e p r o g r a m i n o p e r a t i o n . T h e s y s t e m d i s p l a y s t h e n d o n o t s h o w t h e s t a t u s o { t h e s y s t e m a t t h e t i m e o f t h e e r r o r .

P A R I T ' Y ' C H E C K : T h i s s w i t c h i s n o r m a l l y s e t a t S T O P . W h e n a p a r i t y e r r o r i s d e t e c t e d , t h e p r o c e s s i n g u n i t s t o p s a n d t h e r r : r r o r is d i s p l a y e d . W h e n t h e s w i t c h i s s e t a t R U N , p a r i t y o r r o r s a r e d e t e c t e d a n d d i s p l a y e d in t h e r e g i s t e r d i s - p l a y u r r i t ( 8 P R O C C H K ) , b u t t h e s y s t e m is n o t s t o p p e d .

S T O R I I G E f E S f : T h i s s w i t c h a l l o w s th e I B M C u s t o m e r E n g i n e , : r r t o a l t e r o r d i s p l a y s t o r a g e i n r u n o r s t e p m o d e .

A D D R I N C R E M : T h i s s w i t c h i s u s e d b v t h e I B M C u s t o m e r E n g i n e , l r t o c o n t r o l a c o u n t e r t h a t i n c r e m e n t s t h e s t o r a g e a r C d r e s s r e g i s t e r . T h i s s w i t c h i s e f f e c t i v e o n l y w h e n t h e s \ r / s t e m i s i n t h e C E t e s t m o d e s o f a l t e r o r d i s p l a y s t o r a g e .

N o t e : f h e C H E C K R E S E T k e y i m m e d i a t e l y re s e t s a l l 3 4 1 1 a n d 5 4 4 5 f u n c t i o n s a n d s t a t u s in d i c a t o r s ; t h e r e f o r e , d o n o t p r e s s t h e C H E C K R E S E T k e y w h i l e t h e 3 4 1 1 o r 5 4 4 5 a t t a c h m e n t is p r o c e s s i n g l / O i n s t r u c t i o n s .

C E K e y s

S Y S T E M R E S E T : W h e n t h e S Y S T E M R E S E T k e y i s p r e s s e d , t h e s y s t e m e n t e r s a n i d l e s t a t e . A l l i n p u t / o u t p u t a n d m a c h i n e r e g i s t e r s , c o n t r o l s , a n d in d i c a t o r s a r e re s e t . A p r o g r a m m u s t b e r c l o a d e d a f t e r a s y s t e m r e s e t . T h e C E M O D E S E L E C T O R s w i r c h m u s t b e s e t a t P R O C E S S f o r t h e S Y S T E M R E S E T k e v t o b e e f f e c t i v e .

C H E C K R E S E T : W h e n t h i s k e y i s p r e s s e d , a l l c u r r e n t e r r o r c o n d i t i o n s i n t h e p r o c e s s i n g u n i t a n d in p u t / o u t p u t d e v i c e s a r e c l e a r e d . T h e s y s t e m r e s u m e s n o r m a l o p e r a t i o n w h e n c o n s o l e S T A R T is p r e s s e d . T h e C H E C K R E S E T k e v is a l s o u s e d t o r e s e t a p o w e r c h e c k .

A D D R E S S C O M P A R E : T h e s e s w i t < : h e s e n a b l e th e I B M

C i u s t o n t e r E n g i n e e r t o s t o p t h e p r o g t a m d u r i n g e i t h e r I 7 S C A S T E 1 o r L C A S I F p : T h i s k e y i s u s e d fo r B S C A o r ( i n s t r u o t i o n ) o r E ( e x e c u t i o n ) c y c l e s w h e n t h e c o n t e n t s o f L C A t e s t i n g . T h e k e y i s e f f e c t i v e o n l y w h e n B S C A o r L C A t h e s t o r a g e a d d r e s s r e g i s t e r ( S A R ) m a t c n t h e s e t t i n g o f i s i n t h e t e s t m o d e a n d s t e o m o o e .

t h c A D D R E S S / D A T A S W i t C h C S . T h E A D D R E S S C O M P A R E l i g h t a l s o tu r n s o n w h e n t h e s e a d d r e ; s e s m a t c h . T h e C E

L O D E S E L E C T O R s w i t c h m u s t b e s e t a t P R O C E S S a n d S e l e c t o r S w i t c h e s t l r e r e g i s t e r d i s p l a y u n i t m u s t b e s e t a t 1 S A R H l f o r t h e

A , D D R E S S C O M P A R E s w i t c h t o b e e f f e c t i v e .

LSR DISPLAY SELECTOR.' This rotary switch detects the a r e a s o f i n t e r n a l s t o r a g e t o b e d i s p l a y e d b y t h e r e g i s t e r d i s - C E K e y ' : T h i s s w i t c h i s o p e r a t e d b y t h e I B M C u s t o m e r p l a y u n i t .

E n g i n e , e r t o p r e v e n t r e c o r d i n g t i m e o n t h e c u s t o m e r u s a g e m e t e r . l t a l l o w s th e C E m e t e r t o r u r r w h e n t h e s y s t e m is b e i n g s e r v i c e d '

c E M 1 D E s E L E C T 7 R : T h i s r o t a r y s w i t c h s e r e c t s o n e o f the three processing modes: process, step, or test. Prccess i s t h e m o d e f o r i l o r m a l s y s t e m o p e r a t i o n . I n s t e p m o d e , o n e o f t h r e e s e t t i n g s c a n b e u s e d to c o n t r o l t h e w a y i n w h i c h t h e p r o g r a m is e x e c u t e d . T h e t e s t m o d e s e t t i n g s a r e u s e d b y t h e C E t o d i s p l a y o r a l t e r s t o r a g e .

I B M 5 4 1 5 P r o c e s s i n g U n i t C o n t r o l s a n d I n d i c a t o r s 1 3

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Chapter 2. IBM 3277 Display Station

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C O N T R O L S ; A N D I N D I C A T O R S

Power Switch

T h e p r o w e r s w i t c h i s l o c a t e d a t t h e l o w e r left corner of the C R T s c r e e n (F i g u r e 9 ) . T o turn cn the power to rne d i s p l a y s t a t i o n , p u l l o u t t h e s w i t c h la b e l e d O F F _ p U S H . A d e l a y o f a f e o u s e c o n d s i s b u i l t i n t o t h e d e v i c e to ailow it to w a r m u p . l t f t e r t h i s d e l a y , a short horizontal bar (cursor) a p p e a r s i n t h e u p p e r - l e f t c o r n e r of the screen (Figure 9). To t u r n o f f t h e l r o w e r to t h e display station, push the switch i n .

T h e p o w e r s w i t c h i s a l s o u s e d to c o n t r o l the claritv of the c h a r a c t e r s o n t h e s c r e e n . T h e r e a r p o r t i o n o f t h e switch c a n b e t u r n e d t o a d j u s t th e c o n t r a s t of the image on the s c r e e n . T h e f r o n t p o r t i o n o f t h e s w i t c h is used to adjust t h e b r i g h t n e s s . T h e f o l l o w i n g d i a g r a m shovrn a s i d e v i e w of the power switch.

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IBM System./3 Model 15 Operator's Guide

IBM System./3 Model 15

Operator's Guide

Preface

Technlcal Newsletter

IBM System/3 Model 15

Operator's Guide

Technical Newsletter

IBM Systerm/3 M o d e l 1 5

Operator':; Guide

Contents

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