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GA21-9184-3
IBM 3742 Dual Data Station
Systems ReferenceManual
ff r} f-\ /-J
J]J5IMJ
Fourth Edition (November
19771
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 A 2 l g9 1 2 . c h a n g e s a r e i n d i c a t e d b v a v e r t a c a l
- 4-
l i n e a t t h e l e f t o f t h e c h a n g e ;n e w o r e x t e n s i v e l yr e v i s e di l l u s t r a t i o n sa r e d e n o t e d b v a b u l l e t
(o) at the left of the figure caption.
Changes re periodicallymade to the information in this manualand will be reoorted in
a
s u b s e q u e n t e v i s i o n so r t e c h n i c a l n e w s l e t t e r s .
r
R e q u e s t s o r c o p i e so f I B M p u b l i c a t i o n ss h o u l d b e m a d e t o y o u r I B M r e p r e s e n t a t i v e r t o t n e
f o
I B M b r a n c h o f f i c e s e r v i n gy o u r l o c a l i t y .
A R e a d e r ' sc o m m e n t F o r m i s a t t h e b a c k o f t h i s p u b l i c a t i o n . l f t h e f o r m i s g o n e , a d d r e s s
y o u r c o m m e n t s 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 ,
Minnesora
55901.
O C o p y r i g h t I n t e r n a t i o n a l B u s i n e s s a c h i n e sC o r p o r a t i o n 1 9 7 3 , 1 9 7 7
M
Preface
This publication is a referencemanual that provides specific . Chapter 6. Second Drsk provides information on second
information about the IBM 3742 Dual Data Station. This disk search an'ddisk copy operations.
p u b l i c a t i o ni s i n t e n d e df o r i n s t a l l a t i o ns u p e r v i s o r sa p p l i c a -
,
tion personnel,system analysts,and system engineerswho . Chapter 7. Disk lnitialization provides information on
w i s h s p e c i f i ci n f o r m a t i o n o n t h e p r o g r a m m i n gf o r a n d h o w t o i n i t i a l i z eo r c h e c k a d i s k e t t e .
operational considerationsof the IBM 3742 Dual Data
Station. o Chapter 8. Self-Check Feature provides information
a b o u t s e l f - c h e c k i n g h e n u s i n gm o d u l u s 1 0 o r
w
The f BM 3742 Dual Data Station is part of the IBM 3740 modulus 1 1 .
Data Entry System. The IBM 3742 Dual Data Station is a
two operator key entry station used to record data on the . Chapter 9. Proof Keyboard Feature provides infor-
data recording media called the IBM Diskette. Once data mation about the numeric key arrangementfor the
has been recorded on the diskette by the 3742. the data proof keyboard.
can be converted to tape by using the IBM 3747 Data
Converter, or the diskette can be used with the IBM 3540 o Appendix A. Timings provides information on timing
D i s k e t t e I n p u t / O u t p u t U n i t w h i c h p r o v i d e sd i r e c t i n p u t f o r s e a r c h e so f f l i n e f i e l d t o t a l s , c o p i e s ,a n d d i s k
,
c a p a b i l i t i e so a S y s t e m / 3 7 ot h a t h a s v i r t u a l s t o r a g e
t i n i t i a l i z a t i o no p e r a t i o n s .
capabilities.
o Appendix B provides a glossaryof terms used in this
T h i s p u b l i c a t i o ni s d i v i d e d i n t o t h e f o l l o w i n g : publication.
. ChapterT. lBM3742Dual DataStationprovidesan . Anindexisprovidedattheendofthepublication.
overview oI Ihe 3742.
T h i s p u b l i c a t i o na s s u m e sh a t t h e r e a d e ri s f a m i l i a r w i t h
t
a Chapter 2. Operation Modesand Considerationsprovides data entry techniques and is also familiar with the contents
i n f o r m a t i o n a b o u t b u f f e r s ,m o d e so f o p e r a t i o n ,a n d of the following manuals:
related considerationsconcerning the 3742.
o IBM 3740 Data Entry System System Summary and
. Chapter 3. Program lnformation provides information lnstallation Manual - Physical Planning, GA21-9152.
on program coding and program chaining.
. l8M 3742 Dual Data Statictn Operator's Guide,
. Chapter 4. Production Statrstics provides information GA21-9136.
on the production statistic counters, and the displaying
of the counters. o The IBM Diskette General lnformation Manual,
I
I GA21-9182.
o Chapter 5. Offline Field Totals provides information on
offline field totals capabilities. . IBM 3741 Data Station ReferenceManual, GA21-9183.
Contents
C I . I A P T E R1 . I B M 3 7 4 2 D U A L D A T A S T A T I O N 1 CHAPTER4. PRODUCTIONSTA,TISTICS. 35
IBM 3742 Dual Data Station Overview 1 Counters 35
Keyboard Kevstroke Counter 35
Display J Record Counter 35
DisketteUrrit J Verify Correction KeystrokeCounter 35
Standard Functions and AvailableFeatures 4 D i s p l a y i n gP r o d u c t i o n S t a t i s t i c s 36
Track to Record Conversion Table 37
CHAPTER 2. OPERATION MODESAND
C O N S ID E R A T I O N S CHAPTER 5. OFFLINE FIELD TOTALS 39
Buffers O f f l i n e F i e l d T o t a l s O p e r a t i o n. 39
Current Record Buffer 6 D i s p l a y i n gO f f l i n e F i e l d T o t a l l \ c c u m u l a t o r s 39
P r e v i o u sR t , c o r d B u f f e r 5 P r o g r a m m i n gF i e l d T o t a l F i e l d s 40
Hold Buffer 5 Accumulate Totals Fields 40
P r o g r a mB u l f e r s 6 Read Out Field Totals Fields 40
Power On Information E R e a dO u t / R e s e t F i e l d T o t a l s F i e l d s 40
M o d e so f O p e r a t i o n o ControlStatements. . 41
Read Index Mode (X) o Control Statement Format Character Description 42
Index Track Data Set Labels 8 E x a m p l e s. 43
Data Set Label Error Checkino 11 Unconditional ProgramBuffer llelection . 44
M u l t i p l e D a t a S e t sP e r D i s k 11 Offline Field Totals Example . 44
Modifv Index Mode (M) 11 Offline Field Totals Setup Exarnple 46
EnterMode (E) 12
Update Mode (U) 13 C H A P T E R6 . S E C O N DD I S K 47
Verify Mode (V) 13 Dual Disk Preoaration n3]42
o 47
Field Correct Mode (C) 15 Duaf Disk Operation on the 3142 . 41
S e a r c hM o d e ( S ) Search Ooerations on the Second Disk 47
Off line Field Totals Mode (F) 18 copv 48
H e x a d e c i m a lD a t a 10 Copy All (lmageCopy) or Part of Disk 2 48
M u l t i p u n c h O p e r a t i o n s. 19 Copy All (lmageCopy) or Part of a Data Set 48
H e x a d e c i m a lD i s p l a y 1q Copy Up to a Specified Record on Disk 2 48
Deleted Records IU Copying a Record 48
Mode Considerationsor Deleted Records
f 20
Record Insert 21 CHAPTER 7. DISK INITIALIZA'TION 49
Record lnsert Mode Characteristics 22 lnitialization Procedure. 50
A d d i n g R e c o r d st o a B a t c h . 23 Disk Checking 51
Data Recovery 23
Bad Spots on Disk 24 C H A P T E R 8 . S E L F - C H E C KF E A T U R E 53
No Record Found (21Error 24 C o m p u t i n g t h e S e l f - C h e c kD i g i t 53
Seek (3) Error 24 M o d u l u s1 O 53
Disk Read (4) Error . 25 M o d u l u s1 1 Y
Disk Write (5) Error. 25
CE Mode 25 C H A P T E R9 . P R O O F K E Y B O A R D F E A T U R E 55
C H A P T E R3 . P R O G R A M I N F O R M A T I O N . 27 A P P E N D I XA . T I M I N G S 5]
P r o g r a mC o d i n g 2'1
P r o g r a mF i e l d D e s c r i p t i o n s 27
APPENDIX B. GLOSSARY 59
C r e a t i n ga n d S t o r i n g P r o g r a m s . 30
D i s p l a y i n gP r o g r a m s 32
C h a n g i n ga P r o g r a m i n a P r o g r a m B u f f e r . 32 INDEX 61
P r o g r a mC h a i n i n g 32
P r o g r a mC h a i n i n g E x a m p l e 33
Contents v
Chapter1. IBM 3742DualDataStation
IBM3742 DUAL DATA STATION OVERVIEW
T h e I B M 3 7 4 2 D u a lD a t aS t a t i o n( F i g u r e ) i s a s t a n d - a l o n e
1
device with two operatorstations.Eachoperatorstation
h a si t s o w n k e y b o a r d n dd i s k e t t e n i t . T h e d i s p l a y n i t i s
a u u
shared between stations-
D i s k e t t eU n i t s
KeyboardUnits
D i s p l a yU n i t
Diskette Shelf
Display Screen
Brightness ontrol
C
o Figure 1. IBM 3742 Dual Data Station
IBM 3742 Dual Data Station 1
Keyboard 'fhe
is associated ith the lower row of labels.
w s p e c i a lk e v s
( D U P , F I E L D B K S P , R E C A D V , R E S E T ,e t c . ) p e r f o r m
T h e k e y b r c a r d F i g u r e2 ) c o n s i s t s f d a t a k e y s , s p e c i a l
( o s p e c i f c f u n c t i o n sd u r i n g d a t a e n t r y . T h e s w i t c h e sp r o v i d e
i
f u n c t i o n l c e y s , u n c t i o n s e l e c tk e y s , t w o r o w s o f l a b e l s , n d
f a a u t o m a t i cs k i p / d u p l i c a t e , u t o m a t i c r e c o r da d v a n c e , n d
a a
s w i t c h e s . D a t a k e y s p r o v i d et h e m e a n so f k e y i n g 6 4 d i f f e r _ p r o g r a mn u m e r i c s h i f t f u n c t i o n s . F o r a c o r n p l e t ed e s c r i p -
e n t d i s p l a y a b l e h a r a c t e r s .A l l 2 5 6 E B C D I C c o d e sc a n b e
c
tion of the keyboard's keys and switches,s
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