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GA21-9183-4
rBM 3741
Data Station
Systems Reference Manual
IBnfi
Fifth Edition (November
19771
T h i s i s a m a j o r r e v i s i o no f , a n d o b s o l e t e s , A 2 1 - 9 1 8 3 - 3 . C h a n g e sa r e i n d i c a t e d b y a
G
v e r t i c a l 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 y a b u l l e t { o ) a t t h e l e f t o f t h e f i g u r ec a p t i o n .
Changes re periodicallymade to the information in this manual and will be reported in
a
s u b s e q u e n tr 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 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 s 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 vo r
f s e
t o t h e I B M b r a n c ho f f i c e s e r v i n g o u r l o c a l i t y .
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 h a s b e e n
r e m o v e d ,a d d r e s sy 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 ,M i n n e s o t a 5 5 9 0 1 . C o m m e n t s b e c o m e t h e p r o p e r t y o f l B M .
O C o p y r i g h t f n t e r n a t i o n a B u s i n e s s a c h i n e s o r p o r a t i o n1 9 7 3 , 1 9 7 4 , 1 9 7 5 , 1 9 7 6 , 1 9 7 7
l M C
Preface
T h i sp u b l i c a t i o ns a r e f e r e n cm a n u atl h a t p r o v i d e s
i e Chapter 4. Production Statrstrcs provides information
spec i f i n f o r m a t i o n b o u tt h e I B M 3 7 4 1 D a t aS t a t i o n .
c a o n t h e p r o d u c t i o n s t a t i s t i cc o u n t e r s ,a n d t h e d i s p l a y -
T h i s p u b li c a t i o n s i n t e n d e do r i n s t a l l a t i os u p e r v i s o r s ,
i f n ing of the counters.
a p p l i c a t i o p e r s o n n es,y s t e m n a l y s t s ,n ds y s t e m
n l a a
e n g i n e e r sh o w i s hs p e c i f i cn f o r m a t i o n n t h e p r o -
w i o Chapter 5. Online Field Totals and Chapter 6'
g r a m m i n go r a n d o p e r a t i o n a lo n s i d e r a t i o n s t h e I B M
f c of Off line Field Totals provide information on online
3 7 4 1 D a t aS t a t i o n . and offline f ield totalscapabilities.
The IBM 374'l DataStationis part of the IBM 3740 Data c Chapter7. Second Drsk provides informationon second
Entry System.The 3741 DataStationconsists two mod- of d i s ks e a r c h , n d c o p y o p e r a t i o nw h e nt h e s e c o n d i s k
a s d
els ( M o d e l s a n d 2 ). T h e o n l y d i f f e r e n c e e t w e e n o d e l1
1 b M i sa d d e d o t h e 3 7 4 1 .
t
a n d M o d e l2 i s t h e a d d i t i o no f b i n a r ys y n c h r o n o uc o m m u -
s
on
n i c a t i o nc a p a b i l i t i e s
s M o d e l2 . o Chapter8. Disk lnitialization providesinformation on
h o w t o i n i t i a l i z e r c h e c ka d i s k e t t e .
o
L i k e t h e 3 7 4 1 D a t aS t a t i o n t h e I B M 3 7 4 1 P r o g r a m m a b l e
,
W o r k S t a t i o n s p a r to f t h e I B M 3 7 4 0 D a t aE n t r y S y s t e m .
i . Chapter9. Self'CheckFeature providesinformation
The 3741 Programmable Work Stationconsists two mod- of a b o u ts e l f - c h e c k i n g e nu s i n g o d u l u s 0 o r
wh m 1
els ( M o d e l s a n d 4 ). T h e 3 7 4 ' l P r o g r a m m a bW o r k S t a t i o n
3 le modulus 1 1.
f u n c t i o n s sa 3 7 4 1 D a t aS t a t i o n
a u n l e s sh e 3 7 41 P r o g r a m -
t
mableWork Stationis undercontrol of an ACL program. providesinformation on
o Chapter 10. Communications
T h i s p u b l i c a t i o n r o v i d e isn f o r m a t i o n b o u tt h e 3 7 4 1P r o -
p a communications
the binarysynchronous featureof the
g r a m m a b lW o r k S t a t i o n n l y w h e n
e o i t f u n c t i o n s sa 3 7 4 1
a 3 74 1 .
DataStation.
. Chapter ll. tBM 3713, tBM 37l5,and IBM 3717 Printers
In this publication, references madeto the 3741 DataSta' p r o v i d eis f o r m a t i o o n h o w t h e 3 7 1 , 3 7 1 5 ,a n d3 7 1 7
n n 3
tion Models1 or 2 apply (respectively) the 3741 Program-
to to the 3741.
P r i n t e r s r eu s e d h e na t t a c h e d
a w
m a b l e o r k S t a t i o nM o d e l3 o r 4
W ( w h e nM o d e l s a n d4 a r e
3
not undercontrol of an ACL program) For information
. . Chapter 12. Proof KeyboardFeatureprovidesinforma'
about the 3741 Programmable Work Stationwhen it is un- t i o n a b o u tt h e n u m e r i c e y r e a r r a n g e m efn tr t h e p r o o f
k o
der control of an ACL program.seeIBM 3741 Models3 keyboard.
and 4 ProgrammableWork Station Generallnformation,
GA21-9196, or tBM 3741 Models3 and 4 Programmable . Chapter 13. Data RecorderAttachment Feature pro'
Work StationProgramming Reference Manual' G421-9194' v i d e s n f o r m a t i o n n h o w t h e 1 2 9 C a r dD a t aR e c o r d e r
i o
and 5496 Data Recorder usedwhen attached a
are to
T h i s p u b l i c a t i o ns d i v i d e d n t o t h e f o l l o w i n g h a p t e r s
i i c 3741.
a n da p p e n d i x e s :
. Chapter 14. l/O Adapter providesinformation on how
. Chapter l. IBM 3741 Data Station providesan over- datadirectlyto or from a system'
the 3741 can transfer
v i e wo f t h e 3 7 4 1 .
. AppendixA. Timingsprovides informationon timing
o Chapter2. Operation Modesand Considerationspro' f o r s e a r c h eo. f l i n e
sf f i e l d t o t a l s , o p i e sa n dd i s k i n i t i a l -
c ,
v r d e sn f o r m a t i o n b o u tb u f f e r s m o d e s f o p e r a t i o n ,
i a , o ization Perations.
o
and related considerations concerning 3741. the
. Appendix B. Card Punch to Hexadecimal Conversion'
. Chapter3. Programlnformation providesinf ormation
o n p r o g r a m o d i n g p r o g r a m h a i n i n ga n d o p e r a t o r
c , c ,
guidance.
This publication assumes the reader familiarwith
that is
dataentry techniques is alsofamiliarwith
and the con_
t e n t so f t h e f o l l o w i n g a n u a l s :
m
. IBM 3740 Data Entry System
SystemSummary and tnstallation planning,
GA21_9152.
. l8M 3741 Data Station Operator,sGuide,
GA21_g131
.
. The IBM Diskette Generallnformation Manuat,
cA21-9182.
. IBM 3742 Dual Data Station ReferenceManual,
G421-9184.
Contents
1 CHAPTER PRODUCTION
4. STATISTICS 34
C H A P T E R . I B M 3741 DATA STATION
1
1 Counters 34
IBM 3741 DataSta tion Overview
Keyboard 2 Keystroke Counter 34
D isplay 2 RecordCounter 34
3 Verify Correction Keystroke Counter 34
Diskette Unit
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 34
StandardFunctions and AvailableFeatures
T r a c k t o R e c o r d C o n v e r s i o nT a b l e 35
CHAPTER 2. OPERATION MODESAND
5 CHAPTER 5. ONLINE FIELD TOTALS 36
CONSIDERATIONS
Online Field Totals Operation . 36
Buffers 5
D i s p l a y i n gF i e l d T o t a l s . 36
Current Record Buffer
P r o g r a m m i n gO n l i n e F i e l d T o t a l F i e l d s 36
P r e v i o u sR e c o r d B u f f e r ,
Accumulate Totals Fields 37
H o l < lB u f f e r
P r o g r a mB u f f e r s . 5 Read Out/Reset Field Total Fields 3I
Online Field Total Restrictions 38
Power 0n Information
o Example 38
M o d e so f O p e r a t i o n .
A u t o B a l a n c eE x a m p l e . 39
Read Index Mode (X) b
Index Track Data Set Labels 8
11 CHAPTER6. OFFLINE FIELD TOTALS 40
Dala Set Label Error Checking
11 O ff l i n e F i e l d T o t a l s O P e r a t i o n 40
Moclify Index Mode (M)
12 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 A c c u m u l a t o r s 40
EnterMode (E)
13 P r o g r a m m i n gO f f l i n e F i e l d T o t a l F i e l d s 41
Update Mode (U)
13 A c c u m r : l a t eT o t a l s F i e l d s 41
Verify Mode (V)
't5 Read Out Field Totals Fields 41
Field Correct Mode (C) .
S e a r c hM o d e ( S ) . 15 Read Out/Reset Field Totals Fields 41
F i e l dT o t a l sM o d e ( F ) 18 Control Statements 42
H e x a d e c i m a lD a t a 18 C o n t r o l S t a t e m e n t F o r m a t C h a r a c t e rD e s c r i p t i o n 43
Multipunch Operations. 19 E x a m p l e s. 45
19 Unconditional ProgramBuffer Selection . 46
H e r : a d e c i m aD i s p l a y
l
19 Of fline Field Totals Example 46
DeletedRecords.
zu P r o g r a mB u { f e r 5 47
Mode Considerationsor Deleted Records
f
20 P r o g r a mB u f f e r 6 47
Recorrl Insert Feature
21 P r o g r a mB u f f e r 7 47
Record Insert Mode Char a c t e r i s t i c s
22 Off line Field Totals Setup Example 47
A d d i n g R e c o r d st o a B a t c h
Data Recovery 22
23 CHAPTER . SECOND ISK
7 D 49
Bad Spotson Disk
23 Dual Disk Operation on the 3741 49
No Record Found (2) Error
23 S e a r c hO p e r a t i o n so n t h e S e c o n d D i s k 49
Seek (3) Error
23 50
Disk Read (4) Error . copy
Copy All (lmage Copy) or Partof Disk 2 50
DiskWrite (5) Error 24
24 Copy All (lmage Copy) or Part of a Data Set 50
CE Mode .
Copy Up to a Specif ied Record on Disk 2 50
25 Copying a Record 50
CHAPTER 3. PROGRAM INFORMATION
Program Coding . 25
25 CHAPTER 8. DISK INITIALIZATION 51
P r o g r a mF i e l d D e s c r i p t i o n s
2a InitializationProcedure 52
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 Disk Checking 53
D i s p l a y i n gP r o g r a m s
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 . 30
30 CHAPTER 9, SELF.CHECK FEATURE 55
P r o g r a mC h a i n i n g
31 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 55
P r o g r a mC h a i n i n g E x a m p l e
31 M o d u l u s1 0 55
Operator Guidance
Prompting Messages . 32 M o d u l u s1 1 56
CHAPTER10. COMMUNICATIONS 57 C H A P T E R 2 , P R O O FK E Y B O A R D
1
Networks 59 FEATURE 116
Features 61
S y n c h r o n o u sC l o c k . 61 CHAPTER 3. DATA RECORDER
1
Terminal ldentification - 61 ATTACHMENTFEATURE 117
Operator ldentification Card Reader 62 PunchOperations 117
Keylock 62 Punch Modes 117
ExpandedCommunciationsFeature . 63 Read Operations 118
E x p a n d e d C o m m u n i c a t i o n s / M u l t i D o i n tD a t a L i n k Read Modes I 18
Control Feature 66 Format Current Record Buffer 119
P r o g r a m m i n gS u p p o r t 68 C a r d R e a d / P u n c hF o r m a t C o n t r o l 120
Communication Modes 68 Program Level A 120
Transmit Mode (T) 69 C a r d R e a d / P u n c h F o r m a t C o n t r o l P r o g r a m s. 121
ExpandedCommunicationsTransmit Mode (J) . 69 C a r d R e a d / P u n c hF o r m a t I n s t r u c t i o n S e t 121
Transmit-Transparent Mode ( P) 70 Function Switches 122
Transmit Mode Examples How Format Control Works 123
R e c e i v eM o d e ( R ) / E x p a n d e d C o m m u n i c a t i o n s R e c e i v e 72 Format Control Examples . 124
R e c e i v eM o d e E x a m p l e . 74
T r a n s m i t / R e c e i v eM o d e ( B ) 74 CHAPTER 14. IIO ADAPTER 130
E x p a n d e d C o m m u n i c a t i o n sT r a n s m i t / R e c e i v e File Transfer 130
Mode (K) 76 Mode 1 131
T r a n s m i t - T r a n s p a r e n t / R e c e i vM o d e ( D ) .
e 76 Mode 2 131
W r i t i n g o f R e c e i v e dD a t a O v e r P r e v i o u s l y Mode 3 131
Transmitted Data 76 Mode 4 132
T r a n s m i t / Re c e i v eM o d e E x a m p l e s 77 Mode 5 132
Inquiry Mode (l) 80 S u m m a r y o f F i l e T r a n s f e r O p e r a t i o n s( R e a d
B i n a r y S y n c h r o n o u sC o m m u n i c a t i o n sS u m m a r y 81 or Write) 133
O p e r a t i n gP r o c e d u r e s a2 Error Recovery Procedures 134
Line Termination and Error Conditions 89 Disk Errors 134
Termination of the Data Call 89 System Channel Errors 134
Inquiry Mode Termination . 89
BSCA Error Conditionsand Indications 89 APPENDIX . TIMINGS
A 135
BSCA Disk Errors 90
Track and Sector Indicators 91 A P P E N D I X . C A R DP U N C H O H E X A D E C I M A L
B T
Status MessageFormat 92 CoNVERS|ON. 136
B S C C E S t a t u sL i n e . 92 C A R DP U N C H O H E X C O N V E R S I O(NN
T I
Error Recovery Procedures 92 H E X A D E C I M AO R D E R }
L 136
C O M M U NI C A T I O N S T H R O U G H P U T 94 C A R DP U N C H O H E X C O N V E R S I O(NN C A R D
T I
P U N C HO R D E R ) 137
CHAPTER 11. IBM 3713, IBM 3715, AND IBM
3717 PRINTERS 95 GLOSSARY . 138
IBM 37 13 Printer 95
I B M 3 7 1 3 A d j u s t a b l e M a r g i n sF e a t u r e 95 TNDEX 140
IBM 3713 Forms Stand Feature 95
IBM 3715 Printer 96
IBM 3715 Forms Stand Fearure 96
I B M 3 7 1 7P r i n t e r 97
IBM 3717 FormsStandFeature 97
Functions 97
Printer Modes 97
Printer Formatting . 98
Local Format Control 99
Horizontal Tab and Vertical Skip Stop Characters 102
Local Format Control Example 104
ProcessingUnit Format Control 107
Printer Error Conditions 110
U Error (Printer) 110
W Error (Printer Format) 110
E d i t i n g o n t h e 3 7 1 5 a n d 3 7 ' 1 7. 111
Editing Consideration 111
Editing Example 114
vl
Chapter IBM 3741DataStation
1.
I B M 3 7 4 1 D A T A S T A T I O NO V E R V I E W Work StationMod'
o Processed the 3741 Programmable
by
els3or4
The IBM 3741 DataStationis part of the 3740 Data Entry
Sy'stem.The IBM 3741 DataStationis a key entry device o U s e d i t h t h e I B M 3 5 4 0D i s k e t t en p u t / O u t p u t n i t
w I U
usedto recorddataon a datarecording mediumcalledthe which provides directinput capabilities a System/37O
to
IBM diskette.
o P r i n t e d y t h e 3 7 1 3 .3 7 1 5 ,o r t h e 3 7 1 7 P r i n t e r
b
M , o d e1 ( F i g u r e ) i s a s t a n d a l o nd e v i c e h i c hh a so n e
l 1 e w
k e y b o a r d n i t , o n e d i s p l a y n i t , o n eo r t w o d i s k e t t e n i t s ,
u u u
a n da c o n t r o lu n i t . M o d e l2 ( n o t p i c t u r e d i)s t h e s a m e s
a lVote; The 3741 Programmable Work Station,Models3 and
M o d e l1 , w i t h t h e a d d i t i o n f a b i n a r ys y n c h r o n o uc o m -
o s 4, operates a 3741 DataStation,unless Programmable
as the
Work Stationis underApplication Control Language (ACL)
m u n i c a t i o na d a p t e r .
s
program control. Whenoperating as a DataStation,the
Oncedata hasbeenrecorded the disketteby the 3741,
on Model3 hasthe same functionsand available features theas
thre datacan be transmitted anotherlocationthroughthe
to M o d e l1 ; a n dt h e M o d e l4 h a st h e s a m e u n c t i o n s n d a v a i l -
f a
u s eo f b i n a r ys y n c h r o n o uc o m m u n i c a t i o n s . o r M o d e l2
s F abfe featuresasthe Model 2. *e IBM 3741 Models3 and
o r r l y ,o r f o r M o d e l s a n d 2 , t h e d a t ac a nb e :
1 4 ProgrammableWork Station ProgrammingReference
Manual,GA21-91 94,for informationon the 3741 Program-
o Converted tape by usingthe I BM 3747 DataConverter
to mableWork Station,underACL program control'
Display nit
U DisketteUnit No. 2
Diskette nit No. 1
U
KeyboardUnit
Control Unit
DisplayScreen
Brightness
Control
DisketteShelf (undertabletop)
Figure 1. IBM 3741 Data Station
tBM 3741 Data Station 1
Keyboard
is, redefinesthe top row of keys according to the top row
o f l a b e l s ) , h i c h a r e a l s o g r e e n . T h e r i g h t h a n df u n c t i o n
w
T h e k e y b o 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 e l e c tk e y , l e t t e r e di n w h i t e . i s a s s o c i a t e d i t h t h e l o w e r
w
f u n c t i o n k e y s , f 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 , r o w o f l a b e l s .T h e s p e c i a k e y s ( D U P , F I E L D B K : S P R E C
l .
a n d s w i t c h e s . D a t a k e y s p r o v i d e t h e m e a n so f k e y r n g A D V , R E S E T , e t c . ) p e r f o r m s p e c i f i cf u n c t i o n s d u r i n g d a t a
6 4 d i f f e r 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 e n t r y . T h e s w i t c h e sp r o v i d e a u t o m a t i c s k i p / d u p l i c a t e ,
codes can be keyed with the use of the HEX key. The a u t o m a t i cr e c o r d a d v a n c e , n d p r o g r a m n u m e r i c s h i f t
a
function select keys are used to redefine the top row of f u n c t i o n s . F o r a c o m p l e t e d e s c r i p t i o no f t h e k e y b o a r d ' s
k e y s a s i n d i c a t e db y t h e t w o r o w s o f l a b e l sa b o v et h e keys and switches,see the l8M 3741 Data Station Operator's
t o p r o w o f k e y s . T h e l e f t h a n d f u n c t i o n s e l e c tk e y , l e t t e r e d Guide. GA21-9131.
i n g r e e n ,i s a s s o c i a t e d i t h t h e u p p e r r o w o f l a b e l s( t h a t
w
Figure2. 3741 Keyboard (Modet 1)
Display
T h ed i s p l a y F i g u r e ) p r o v i d e s t a t i o n t a t u sn f o r m a t i o n ,
( 3 s i
programinformation, and dataon the screen.fhe 3741
DataStationuses 40-character
six linesof the drspray
screen.Line 1 indicates stationstatus. Lines2,3, 4, and
the first eight positions (total of 128 positions) line b of
displayeitherdataor programinformation, depending upon
the displaymodeselected.The last30 positions line 5 of
and 6 areusedfor the operatorguidance feature. A cursor
(undersr:ore) usedto indicate
is the positionof tne next
character be entered.
to
G u i d a n c eM e s s a g e
A completedescription the displayis providedin the
of
IBM 3741 Data Station Operator'sGuide, G421 9131. Figure 3. Display Unit with Operator Guidance
2
DisketteUnit
T h e d i s k u n i t r e a d s n d w r i t e so n o n es i d eo f t h e d i s k e t t e .
a
F l g u r e s h o w s h e I B M d i s k e t t e .F o r a c o m p l e t e e s c r i p -
4 t d
t i o n o f t h e I B M d i s k e t t ei,t s l a y o u t ,c a r e , t o r a g e , n d h a n -
s a
dling, seeThe IBM Diskette Generallnformation Manual ,
GA21-9182.
F i g u r e4 . I B M D i s k e t t e
IBM 3741 Data Station 3
S T A N D A R D U N C T I O N A N D A V A I L A B L EF E A T U R E S
F S
IBM 3741 Data Station
F i g u r e5 s h o w s t h e s t a n d a r df u n c t i o n s a n d a v a i l a b l e e a t u r e s
f ( M o d e l s1 a n d 2 ) a n d I B M
for the 3741. S t a n d a r dF u n c t i o n 3741 Programmable ork W
or Feature S t a t i o n * ( M o d e l s3 a n d 4 )
I B M 3 7 4 1 D a t aS t a t i o n
( M o d e l s a n d2 ) a n d I B M S e c o n dd i s k Featu e
r
1
Standard Function 3 7 4 1 P r o g r a m m a bW o r k
le
or Feature S y n c h r o n o u sc l o c k F e a t u r eo n M o d e l 2 o r
S t a t i o n *( M o d e l s a n d 4 )
3
Communications T e r m i n a li d e n t i f i c a t i o n F e a t u r eo n M o d e l 2 o r
S t a n d a r do n t h e 3 7 4 1
Model 2 or 4; not
12 0 0 b p s i n t e g r a t e d
availablen Model
o
modem
1or3
Expanded Nonswitched Featu e
r
F e a t u r eo n M o d e l 2
communications or4
S w i t c h e dw i t h a u t o F e a t ur e
Entering nd updating
a answeI
Standa d
r
records
3 7 13 P r i n t e r F eature
O p e r a t o rg ui d a n c e Standard
3 7 15 P r i n t e r F e a t ur e
Program haining
c Standard
3 7 17 P r i n t e r Feature
R e c o r d l e n g t ho f 1 Standa d
r
t o 12 8 c h a r a c t e r s F e a t u r eg r o u p A : F eature
Searchon c o n t en t Diskinitialization
Standard
Searchon e n d o f d a t a Offline field totals
Standard
Searchon record address O n l i n ef i e l d t o t a l s
Standard
Searchon s e q u e n ita I P r o d u c t i o ns t a t i s t i c s
Standard
content
Self-check umbern
( m o d u l u s1 0 a n d
Ten levels f program
o Standard
cont rol modulus 1)
1
D a t a r e c o r d e ra t t a c h m e n r V er i f y
Featu e
r
" N o t u n d e rA C L p r o g r a m o n t r o l
c
Disk copy S t a n d a r do n s e c o n dd i s k
Figure 5 lPart 2 ol 2). Standard Functions and Available Features
Keylock F e a t u r eo n M o d e l 2 o r 4
O p e r a t o r i d e n t i fi c a t i o n F e a t u r eo n M o d e l 2 o r 4
card reader
Proof keyboard Featu e
r
R e c o r di n s e r t Feature
" N o t u n d e r A C L p r o g r a mc o n t r o l .
Figure5 (Part 1 of 2). StandardFunctionsand AvailableFeatures
4
Chapter2" OperationModesand Considerations
E n t e r i n g ,r - : p r d a t i i rv c, r i f y i n l l o r s e a r c h m g f d a t a r . ' ; r r
g o . P r o g r a mB u f f e r s
disk is p e rf o r m e d b y L l r e l a t a t a t i r r n u s i n gd i f f e r e n t
c s s
r r - r o d eo f o i l c ! ' a t i o n . T h e s t , t . l u e n c e c , p e i a t t r o n sL - ! '
s o{ p I l r e 3 7 4 1 h a s 1 0 l ) r o g r a m u ff e r sn u t t t b e i e o t h r o r - r g9
b 1 h
f o r m t : db y t i r t -c. o n t r o l u n i i w i r h i n r h e d a t a s t a t i o r i s a n c lA . T h e p r o g r a r n u i t e r su s u a i l yc o n l a t np r o l l r a m s
b
d i r e c t l yd e p e n d e n u p o n t h e m o d e i n w h i c h t h e s t a t i o ni s
t i h a t c o n t r o l r r - c o r d o r r n a ia n d p r o c e s s i n qF o r o f f l i n e
f .
o p e r a : i i n qE a c h m o d e 1 r fo p e r a t i o ni s u n i q u e ,a n d , t h e r e '
. f l e i d t o t a i so p e fa t i o n s ,t h e p r o c ; r a nb u f f e r sw i l l a l s o
r
f o r e , t h e u s e o f b u f f e r s ,k e y s , a n d i n f o r m a t i o n r i i s p l a y e d r ; o n t a i n o r r - rf ee l r lt o t a l sc o n t r o l s l a t e m e n t sh a t a r e
s i t
i s d i t fe r e n t i n e a c hm o d e . r c q u i r e dr n o r d e r t o p r : r f o r mt h e f i e l d t o t i t i so p e t d t i o n s .
See Cltas-tter Offlinr-'Field Ttttals ior rnr)re intornration.
6.
P r o q r , r nb u f i e r s a r e a l s < urs e c t o c o n t a t i t o p e r a t o rq u l d a n c e
r . l
B U FF E R S
; p r o r n p t i n qm e s s a g ee c o r d s . F o r i n f o r r n a t i o r to t r o p e r a t o r
r
guidance, see Operator Guirlance in Chapt'er 3. Progran
R u f { e r :e r e t e m p o r a r yr l l o ifr g eJ r e ; r si s t : rfl o r t r a r r s f c r r i n t j
, lnfornatictn.
i l a r a l - , u t w e e nl r e k t . y t r o . l t l , c l r : p i a y ,. r r r i ic i r s k . T h e b u l ' f i : i s
t
a r c ' 1 1 rc u.r r { l f l t e c o r - d u f i e r ' p r e v i o l i s e c o r c b u f f t : r ,
,. r b , r i
h o l d l . r u f i e ra r r r l r o r l r a r ll r L r fr r r s .
, p { P O W ER O N I h IF O R I ' J I A T I O N
W h e n t h e 3 7 4 1 i s t u r n e d o n , t h e c u r r e n tr , : c o r d p t e v i o i l s
,
Current RecordEutfer r e c o r c la n d h o l d b u f f e r sa r e f i l l e d w i t h b i a n k s ,a n d t h e
,
p f o q r a mb u f { e r sa r e f i l l e d w i t h N ' s . P r o g r a mb u f f e r 0 i s
T h e c u r r e n t r - e c o r d u f f e r r e c e i v e s j a t ac h a r a c t e r s s t h e y
r
b a s e l e c t e d .l ' h e s t a t r " rlsn e c l i s J t l a yts e rm a c h i n e - n o t ' r e a d y
i h
are k e y e d . R e c o r c l r e a r Jr o r n d i : ; ka r e a l s op l a c e di n t h i s
s f d i s k s t a t u s( N ) , t f r e r e a di n c l e x o d e ( X ) , p r o g r a ml e v e l0 ,
m
o i
b u f i e r . D a t a d i s l r l a y e d n t h e d i s p l a ys c r e e n s t r o m t h e and curre t disk address 0000. AII otherpositions tt
n 0 o
cllrrent recordbuffer. t h e s t a t u si i n e a r e b l a n k
C l o s i n g h e c o v e ro n t h e d i s k e t t et h a t h a s b e e ni n s e r t e d
t
Previous F{ecordBuffer c h a n q e sh e m a c h i n es t a t u st o w a i t ( W ) . l - h e v o l u m e l a b e l
t
i s r e a db u t n o t d i s p l a y e da n d t h e a c c e s s i b i l i tfye l d i n t h e
, i
T h e p r e v i o u s e c o r db u f f e r - c o n t a i nts e r e c o r dt h a t w a s
r h v o l u m e l a b e li s c h e c k e d .T h e a c c e s s i b i l i tfye l d i s u s e dt o
i
p r e v i o u s l y i s p l a y e d n t h e c u r r e r r t e c o r db l i { f e r . D a t a
d i r a l l o w ( f i e l d i s b l a n k ) o r i n h r b i t ( t i e l dc o n t a i n s n y c h a r '
a
iswrittenon the diskfrom thisbuffer. The previousecord r a c t e r )u s e o f a d i s k . l f t h e a c c e s s r b i l i f ye l d i s n o t b l a n k ,
ti
buffer is the buffer from which characters reobtairred a the disk cannot be processed nd an A error is displayed.
a
b y t h e c o n t r o l u n i t f o r d u p l i c a t r n gn t o d u p l i c a t ef i e l d s
i T h e n t h e 3 7 4 1 w a i t s f o r t h e d i s k e t t et o b e r e m o v e d .
in the current recordbuffer.
A w r i t e t e s t i s m a d e ;i f n o t s u c c e s s f u?,? i s d i s p l a y e d n
l i
p o s i t i o n s a n d 1 0 o f t h e s t a t u sl i n e . l f ? ? i s d i s p l a y e d ,
9
Hold Buffer o t h e r d i s k s s h o u l d b e i n s e r t e dt o s e e i f t h r : ? ? d i s a p p e a r s .
l i t h e ? ? c o n t i n u e s o b e d i s p l a y e dc a l l I U M f o r s e r v i c e
t ,
T h e h o l d b u f f e r c o n t a i n st h e n e x t r e c o r d I o b e v e r i f i e d s i n c et h e m a c h i n ec a n n o tw r i t e r e c o r d s n d i s k .
o
w h e n i n v e r i t y m o d e . T h i s b u f f e r c o n t a i n st h e s e a r c hm a s k
d u r i n g s e a r c ho n c o n t e n t o r s e a r c ho n s e q u e n t i a l o n t e n t
c l f a l l t e s t sa r e s u c c e s s f u ls e c t o r0 8 i s r e a d a n d d i s p l a y e d '
,
o p e r a tl o n s . S e c t o r 0 8 c o n t a i n st h e f i r s t d a t a s e t l a b e l ( a d a t a s e t
l a b e ld e f i n e sr e q u i r e d i n f o r m a t i o n a b o u t a d a t a s e t . S e e
lndex Track Data Set Labels in this chapter for more
i n f o r m a t i o n ) . D a t a e n t r y o r o t h e r d a t a s t a t i o no p e r a t i o n s
can now be performed.