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GC20-1792-1
F i l eN o . 5 3 7 0 - 3 4
System to Disk Operating
/3
Storage
System/Virtual
Extended(DOS/VSE)
Systems ConversionGuide
This guideis intendedto assist System/3
the userwho is
converting a DOS/VSEsystern, be usedasthe prinrary
to to
reference docunrent the conversion. presents
for It a
cor.nparison Systern/3and DOS/VSE featuresand gives
of
procedures convcrting DOS/VSE,
for to eithern.ranually or
witir prograrrturing
tools. Throughnunterous examples, the
usercan seehow to change currentprograms,
his files,and
operation control language con'rparable
to DOS/VSE
prograns,filesandjob control language. Wherecourparable
functionsdo not exist,an alternate approach suggestcd.
is
The guidealsopresents suggested
a migrationplan ar.rda
checklist thingsto consider,
of and directsthe userto
availablenrigration tools.
The guidewill be of interestprimarilyto peoplewithin
the dataprocessing departrnent. The DP Inanager find
will
introductoryinforrnation, migrationguidelines, systent
and
conrparisons. systemprogranrnter find irtftrrntatiot.t
The wiil
on the systemcontrol prograln, system generati<,rn,
and
library considerations. application
The prograntnrerwill
infbrmationon prograu'l
find specific control
conversiott,
cardconversion, sortsand utilities. In addition,rttanagement
outsidethe dataprocessing departurent rnaybe interested in
the overview, advantages DOS/VSE,
the of and migration
considerations.
SecondEdition (November1979)
Iteferences in this publication to lBlll products, programs, or servicres not imply do
1 . h a t B M i n t e n d s t o m a k e t h c s e a v a i l a b l eo u t s i d c t h e U n i t e d S t a t e s .
I
r \ t b r r n l o r r e a d e r ' sc o m n r e n t sh a s b e e n p r o v i d e d a t t h e b a c k o t t h i s p u b l i c a t i o n . I f
t h i s t b r r n h a s b e e n r e r n o v e d ,a d d r e s sc o r n m e n t st o : I t s M C o r p o r a t i o n , T e c h n i c a l
P u b l i c a t i o n s ,D e p t . 8 2 4 , 1 1 3 3 W e s t c h e s t e r v e n u e , W h i t e P l a i n s ,N e n , Y o r k 1 0 6 0 4 .
A
I B M m a 1 'u s e o r d i s t r i b u t e a n y o f t h e i n f b r m a t i o n y o u s u p p l l , i n a n y r v a y i t b e l i e v e s
a p p r o p r i a t er v 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 r n a y , o f c o u r s e ,c o n t i n u e
house the inlbrmation you supply.
() 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 a c h i n e s( ' o r p o r a t i o n 1 9 7 9
M
TABLE OF Cl)NTENTS
Introduction
Part I: Batch Systems. . . 1
Chapter 1. Overview. 2
L/O Devices. 2
Software . . )
Conversion 2
C h a p t e r 2 . D O S , / V S Ea n d S y s t e m , / 3 c h a r a c t e r i s t i c s and Differrences. . 5
Disk operating System,/Virtual Storage Lxtended (DOS,/VSL) 5
DCS,/VSE System Functions 5
Control Programs q
Supervisor . E
Virtual Storage. . . 7
Multiprogranuning and }lrultitasking. . . B
Variable Partition priority. . . 8
Relocati-ng Loader. . .10
Job to Job Communications area . .10
Automated System Initialization. .i 0
Asynchronous Operator Communications .i_0
Job control. .i_0
Data Management- . .1i-
Data Access lvlethods. .1i-
Data Base Management . -1-2
Processing Programs. . .1_2
Service programs .1.2
Spooling . . .I2
Library Service Programs .13
Utilities. . . i-3
LinkageEditor.. ..ltf
ErrorTracking.. ..1q
Language Compilers and Assembler .1_4
RPG II Compiler. .14
DOS,/VSCOBOL compiler. . .14
FORTRANCompiIer. . .15
Assembler. . .15
PL./I Compiler- . .15
Sort./MergeProgram.. ..1-5
Additional DOS,/VSE acilities.
F .L5
Rush Jobs. . .15
Checkpoint./Restart . .l-6
System Generation. . .16
Data Communications. .16
Assigning I./O Devices. .16
Job Duration Printout. - .L7
Job Accounting ' 'r7
Chapter 3. Transition Planning . .:18
Objectives . .18
Considerations . - . .1-9
Programconversion. . .19
Automated Conversion . . : 19
Manual Translation . .19
ReprograrnmingandRedesign.. . .20
File Conversion. . .20
Converting Card Files. . .:20
converting Tape Files. . .'.ZL
Converting Disk Fil-es. . .'2L
,2L
Converting Diskette Fi1es.
,2L
Job Control Statements
Utilities and Sorts. . .'22
Table of Contents
Preparing the Transj_tion. . .22
Personnel Requirements .22
Education. . . .22
Operator Training. . .23
User Departnents .23
St.andards and Control. .23
System Standards .23
Prograrnming Standards. . .2q
(fperating Standards. . . .2t)
control. . - .2q
Classifying Programs and Files .25
Scheduling the Transition. . .26
Implementing the Transition. .21
PreinstallationTasks.. ..27
System Generation. .2i
Conversion of Files. .28
Postinstallation Tasks .29
Checkl-ist. . .28
Expanding the System . .32
Chapter 4. Data File Conver:;ion. .33
Converting CarC Files. . .33
96-Column Cards. . .33
96- to B0-Column Card Conversion . .34
96-Col-umn Card to Diskette Conversion. .35
Convertinq Tape Files. -I 5
Converting Diskette Files. . .36
Chapter 5. DASD FiLe Conversion. .37
Converting Disk Files. . .3j
Virtual Storage Access Method. .3i
SequentialAccessMethod.. ..38
I S A . N Ia n d D A M a c c e s s m e t h o d s . - .38
ot.her Access Method Considerations .38
Summary. . .39
Physical- Disk File Factors . . .39
Data Differences . .39
Conversion Procedures for Disk lites . .q0
VSE,/IBMSystem,/3-3340 Data Import proqram 5746-AM3.. .41_
Intermediate devices . ql-
3348 Data l4odule Consi-derations. . - .42
Unload and Reload Pro<;rams . .42
VSE./VSAMnstallation
I Steps. . .43
Testi-ng. .43
conversion ScheduLe. .43
Additionaf Data Considerations . . .43
Chapter 6. Program Conversion. . .44
Conversion Procedures. . .44
Gene.ral Program Conversion Guidelines. .45
Compiler workfiles .45
Overlay Programs . . . .tl 6
Printer Forms Control. . . .46
RPG II Programs. .46
Major RPG II Differences . .41
Other RPG II Differences .50
Sanple Jobs. .51
COBOLPrograms . . .5L
General Comments - .52
Environment Division .52
lata division. .53
Procedure Division . . .54
Sample Jobs. . .54
FoRT'RAN rograms
P .55
FORTRANStatements . .56
ceneral- Differences. . .57
Sample Jobs. . .5'l
Assermbler Programs . . .58
Language Difference; . .59
rL System,/3 to D O S . / V S EC o n v e r s i o n Guide
ceneral Rufes. .59
Sample Jobs. . .59
Chapter 7. OCL to JCL Conversion . . .61
Job concepts . .61
Assigning Devices. . .62
Cataloged Procedures . . .63
Label Information Area . .6q
Conversion Procedures for OCL. . .64
OCL and JCL Comparison .65
Chapter 8. Utilities .72
Conversion Procedures. . .i2
Evaluate Utility Functions . . .j2
l4anuall-y Recode Control Cards. . - .'t2
Test .. 12
Update Documentation . .73
D O S . / V S EU t i l i t y Programs .j3
System UtiLities . .23
V S E , / V S A I V Ic c e s s M e t h o d S e r v i c e s .
A . .i3
VSE,/Data Interfile Transf er,Testing and operations Utility . . .i4
Comparison of Utility Functi-ons. .1tt
Utility Program Exanples .16
Disk Initialization. . .16
Tape Initializatj_on. . . ' 16
Hard-copy File print . .77
\ , I I ' O Ca n d F j - l e L a b e J _ D i s p l a y . .?B
Single FiIe Display. . .79
Alternate Block Assiqn anC Rebuild BO
Dumping and Restoring a Disk Volune to Tape. . .80
FiLe Delete. . .82
Copy a Disk Volume to Another Disk Volume. .84
File-to-Fil-e Utilities 86
Chapter 9. Library considerations. ' ' 87
.Library Contents . . . .87
rCrganizati-on of Libraries on Disk. . .87
.tibrary Management . ao
Library Maintenance Programs . .89
LibraryProgramExamples.. ..91
Library Conversion Considerations. . .95
r3hapter 10. Sorts. . .9 6
Differences. .96
Ccnverting Sequence Specifications . .96
Converting OCL Statements. . .97
Conversion Procedure .98
Sort ExamDl-e . .99
Chapter 1-1. Spooling . . 100
VSE,/POWER ith optional
w remote job entry feature . . 100
Advantages of Spoolinq . 101
General Comparison - 101-
Job Options. . 103
Operator ControL of Spooling 105
Generation of Spooling Support . 106
Summary of Spooling Differences. . 107
Chapter 1-2. Operator Control of the System . . . 108
The operator's Duties. . 108
System-Operator Communication. . 108
O p e r a t o r c o n s o l e . . . l 0 9
DISPLAYUNIT. .109
Operator Keyboard. . 110
Control Panel. . 110
Using the Display Unit . 11-0
DOS/VSE l"lessages . 111
Progr am llessages 1-12
wait States. . t1,2
Table of Contents iii
OperatorCommands.. .L!2
L/o Devices. 1L2
Summary of Operation Considerations. . 113
Chapter 1-3. System Generation. 115
Supervisor Generation. . i -j _5
Tailoring the Libraries. . 115
Planning for System ceneration . . 115
Scheduling System ceneration . 116
U p d a t i n g Y o u r D O S , / V S ES y s t e m . . 116
t4aintain System History program. . 1l-6
Chapber 14. System,/3 Application packages. . i - 1B
Types of Program Packages. . i-18
Program Package Profile. . 118
ConversionAlternatives.. .119
Source Code Conversj,on of the System./3 program package . . j-j_9
Selection of an Equivalent 4300 program package. . 119
Design and Code Functionally Equivalent prograns 119
Selected System,/3 Program packages 1j_9
tsi-Il- of Materi-al processor (BOMP). 120
DATA/3 . LzO
Job Analysis System,/3. . I2O
'Ierminal
Query facility for System,/3 (TeF,/3) . - I2O
System,z3DITTO.. . j,20
Part II: Data Communications r20
Chapter 15. Introduction to Data Communications. t2L
CCP-CICS,/VS System Overview. . 1_22
Chapter 1-6. CCP-CICS./VS Description and Summary. 13i_
CICS,/VS Software Components. 13i-
System Management. . 131
Task Management. . 131
Task Managernent Summary. . . !32
Storage lvlanagement . 133
Storage Management Sununary . 133
Program Management 133
P r o g r a m l ' l a n a g e m e n t S u m m a r y . . . 1 3 4
Time Management. . 13q
Time Mranagement Summary. i-35
Terminal Management. . 135
Terminal Management Summary. . . 136
l'i le Management. . 13 6
T'r'ansient Data l"lanagement. 136
Temporary Storage Management . t37
Fil-e,/Data Storage Management Summary t3i
SystemService.. 138
Sign-on,/Si9n-off j-39
Sign-on,/Sign-off Summary.. 138
I"iaster Terminal. . i-3 8
Supervisor Terminal- . 138
operator Terminal. 139
Operator Terminal Summary. . 139
System Statistics. . 139
Terminal Test. . 139
Appl.ication Service. 140
Basic Mapping Support. . . 140
BMS l"iap Generation . . 140
BMS Macro Instructions . L42
BMS summary. . 145
System Monitoring. i-45
Trace Management . 145
Dump Management. . 145
System Monitoring Summary. . . 146
Systemsupport.. .L46
Preparation o f t h e D O S , / V S EE y l v i r o n r n e n t 146
Generation of the CICS,/VS proqrams L4i
lv System,/3 to DOS/VSE Conversion cuide
Entry Level system (ELS) ].tt7
S t a r t e r s y s t e m . - . 1 4 8
Generation of CICS./VS Tables . 148
Prepanation of Startup Parameters. 148
System Support Summary . . 149
Chapter 17. CCP-CICS/VS Conversion Considerations. . 1-50
Systern Conversion Considerations . . 150
Task Management. . 150
C C P - I " I R TP r o g r a m . 150
CCP-SRT Program. 150
StorageManagernent. .150
Program Management . 151
Terminal Management. . 151
FiIe Management. . 151
Sequentj-al Files 151
Transient Data . 151-
Temporary Storage. . 151
Systemservice.. 1-52
./MSG terminal operator command. 1-52
MSG system operator command. . I52
,/NAME terminal operator command 152
/FILE terminal operator command L53
/Q terrninal operator command. . 153
Application Service. . 153
application Program Conversion Considerations. . 158
Proqram Interface to CICS,/VS . 158
Command Translator . 160
EXEC Interface Block 160
Handling Exceptional Condit 160
Program Interface Summary. 160
Termina-l- Processi_ng. 161
'I ermi-nal Processing Examples . 1_61_
Terminal Input 161
Termi-nal Output - Format Screen. . 1-62
Terminal Output - Modify Screen. L63
Terminal Output - Display Data L65
3270 Erase All Unprotected . r6'l
32?0 Print . : r67
HANDLE AID cOmmand rb6
RETURN comrnand . . 168
i ermina-L Process ing Summary. . t69
Fj -I e P r o c e s s i n g . 170
Fi-le Processing Summary. . I'12
Datd Areas . t't2
Data Area Summary. t73
lrogram Design L73
Terminal Acquisitio r't3
Disk Sort Program. r74
Recovery/Restart L74
Program Oesign Summary . . 174
C C P - C I C S . / V Sc o n v e r s i o n Activities. . 174
Cirapter 18. System,/3 to 4300 Conversion Alternatives 776
Conversion Al-ternatives Summary. . 1-76
Pro.lr am Descriptions l. /O
VJE./POL.]ER RJE. 1_76
Basi,c Tel-ecommunications Access Method Extended Support
171
'ro,rr:it:X;::li"o.zn"'"iop*."i oio". : : : : . : : : . : : : : : : : 4 1 1
Testing Aids . 177
A na l y s i s r r i d s . 178
Appendix A Sample Configurations 179
Appendix B D O S , / V S ER e f e r e n c e Manuals 180
Table of Contents
LIST OF FIGURES
1- operati.onal- functi-ons and components of Dt4s and Dos,/vsE. 6
2. rnfluence of Dos,/vsE automatic storage management in a
data communications system. 9
3. C o m p a r l s o n o f t h e S y s t e m , / 3 a n d D O S , / V S El i - b r a r j _ e s . . j-3
q. System input,/output f iles. L7
5. Examples of a progress record sheet 25
6. Example of a program j-nventorT form 26
7. Exampl,: of a file inventory form. ... -. . 26
B. Compiler workfiles ..... . 46
9. Header options. qg
10. Extension specifications qg
11. Line counter specifications qg
1,2. pile description specifications 49
13 . Calcul,rtion specif icatj-ons 49
14. Output speci_fications 50
1-5. DOS/VS RPG II -jobs. 5I
16. D O S , / V S O B O Lj o b s .
C ..... . 55
'J-7.
F O R T R A I 'p r o g r a m s t a t e m e n t s . - . .
I 56
18. D O S . / V S F O R T R A Nj o b s . 58
19. D o S . / V S l iA S S E M B L E R j o b s .
-
..... . 60
20. D O S , / V . i l lj o b s t r e a m . - - . 62
21-. System logical devices 63
22. OCL and JCL comparison (part a of 2 ).... 66
22. OCL an23. Disk l;rbel information. ...... 68
24. Tape label information. .. ... . 69
25. V S E / V S A Ml a b e l i n f o r m a t i o n (part I of 2)..-. 70
25. V S E , / V S A Ma b e l i n f o r m a t i o n
l (part 2 of 2).... 7I
26. Compar_ison of utility functi-ons. 75
27. Disk initialization.... ..--..11
28- Tape initialization.... ..... . 78
29. H a r d c < . r p yf i l e print.... j9
30. Volume table of contents (VTOC) display j9
31. Display i-nformation about a single file. B0
32. Assign alternate block g1
33. Rebuil34. Dump and restore a disk volume to tape ...-.. 82
35. File dr:l-etion. 83
36. Delete contents of VTOC . . .. . . 84
3 1. Copy d:Lsk to disk. .... . . Brl
38. Backup and restore system libraries 85
39. S y s t e m , / 3 a n d D O S , / V S El i b a r i e s . . . B7
40. S a m p J , el o c a t i o n s of prlvate libraries... BB
41. Relative location of the four system libraries.. ...... 88
42. Library functions 90
43. C a ' t a 1 o < ;t o a l i b r a r y . . 9j
44. Print a library eltry 92
45. Print .tll directories 92
46. Print t-he system directory.. - 93
47. Print ;rnd punch a li-brary entry. 93
48. De.lete a library entry 9ll
49. Modify a source library entry. 94
50. R e n a m ea l i b r a r y e n t r y . ...... 95
51. S y : s t e m , / 3 a n d D O S , / V Ss o r t j o b . . 99
52. V S l a , / P C l . l Ed a t . a f l o w
R ----.I02
53. Sample spooling control statements.... ..... .103
54. Sprcolirrg control statements and parameters.... .. .i-Otl
55. D O r S , / V S la n d V S E , / p o w E Rj o b s
i .. .i_05
56. O p , e ra t < ; r c o m m a n d s . . 10 6
57. Fo:rmat of display screen. .. . .110
58. Fo:rmat of message line ..110
59. Console message example . . .. . .111
60. Operator commands ..11q
6I . CCPsystemoverview.... -.....123
62. CICS,/VSsystem overview. .. -. .L24
Syrstem,/3 to D O S . / V S EC o n v e r s i o n Guide
63. CCP simple inquiry program (SilT) . .t25
64. CICS,/VSsimple i-nquiry program (one task)... - --..1,26
65. CCP simple inquiry program (MRT) - .1,28
66- CICS,/VSsimple inqui-ry program (two tasks)... .. -.129
67. CICS./VSstorage managenlentof two tasks .....130
68. Mapset definit,ion. . . . .. .'L42
69. Map definition. -...L43
70. FieLd defi-nition... - ....14q
11,. DFF and BMS specifications ...155
72. Inquiry display. . . .1-56
73. DFF specifications coding ..-.157
'14.
BMS specifj-cations coding ... .158
Lis t of Figures vri
INTRODUCTICN
This manual should be read by current users of the System/3 series of
computers who plan to move to a 4300 Processor. It conta.i-ns information
to help you plan the transition, as well as specific too.Ls for
implementing that plan. The manual is divided into two parts. Part I
presents conversion information for a batch System./3. P,1rt II presents
conversion information for a System/3 running online app.Lications. Each
part has the same general structure. The first chapters ,cresent an
overview of the 4300 processor with its associated software, described
in terms of the functions you currently perform on your ,System/3. Later
chapters describe the detailed steps of the conversion, 13ither batch or
online, and identify the tool-s that wilL assist you in y,rur conversion.
The individual who is controlling the conversion project should read the
whole manual . while i-t i-s recommended that others involv,ed in the
conversion do so a1so, they may concentrate on the chapt,?rs that dj-scuss
their specific tasks.
This manual discusses factors that must be considered before the 4300
Processor is delivered. It is intended to give guidance ,luring the
transition plannj-ng; it does not attenpt to solve particular probJ-ems in
indivi-dual situations.
The usefulness of this gui-de will depend to a large extent upon the
accuracy of the specific conversion procedures suggested and the
examples given. Here, a consistent ef fort \"ras made to rnaintain the
strictest accuracy. The discussions cover the comparable functions of a
S y s t e m , / 3 a n d a D O S , / V S E4 3 0 0 P r o c e s s o r , however not every hardware and
software conf iguration couJ-d be taken into account without goi-ng into
encyciopedic detail. It should be understood therefore tnat, for some
configuratj-ons, these generalizations may not be valid.
Ftequent reference will b e m a d e t o t h e D O S . / V S EE n t r y U s e r ' s G u i d e
(cci3-6047), which provides specif ic intcimation on pt-annin-g,
installing, a n d u s i n g D o S , / v S E . T h e D O S , / V S EE n t r y U s e r ' s r S u i d e a l s o
contains a description o f t h e V S E . / P O W E R ,V S E / V S A M a n d V S E , / I C C F p r o g r a m
products.
Introduction 1
CFjAPTER 1. OVER,VIET^1
Ther IBM 4300 processors are growth systems for the
System,/3 user. I,or
purposes of discussion in ttris marrual we will assume you are convertlng
to a 4331 processor model rl- (a sample configuration
is shown i_n
appendix A). The examples in the manual and ihe
discussi-ons of varrous
access methods pertain to fixed block architecture DASD devices, thus
native mode operati-on with Dos./VSE. The 4300 processors
are fully
compatible, thus providing upward growth witn minimal conversion effort.
The 4300 Processors are different frorn the System,/3 but supports some of
the same devices, also functions that the 43-00 operatin<1 system provi<1es
are similar to the System,z3.
Hlsh lever languages arso have a higir degree of
compatability between
the tr^ro systems. you may use Rpcrr, coBol., Assembler, F O R T R A No r p l , / r
languages for 4300 batch apprications. support for Rpcrr, coBo,-,
assembler and pl,/r is also provided in the'primary
data base and
terrninal management programs used by the 43b0 processors.
I4g -D_E\LICEg
Several devices that attach to the System,/3 can also be attached to a
4331 Processor, they are:
5424 Multi Function Card Unit, Model-s A1
and A2.
r L403 printer, Models 2, 7 and Nl_.
t 34L0/L1 Magnetic Tape Sub System, models 1, 2 and 3.
' 3340 Direct Access storage Mo r n o d eI 8 1 a n d 8 2 | s .
The attachment of 3340's is recommendecl for migration
time
activity, however full systems performance is ichieved by r:sing
a fixed block architectuie oASD device. The vsE/rBM slzstem,z3 -
3340 Data rmport program (5746-AM3) is a valuabr-e p.o-gr-*
for
converting systenL/3 33t{0 files to Dos,/vsE sAM and VSE,zVSAIq iles.
f
3340 DASD can be attached to the 4300 processor by
use of
the 3340 data import feature. using vsi,/rBM system,/3 - 334r1 Data
import program you can then read the files and write them .Lo a 4300
DASD devi-ce. (described in the DASD conversion section)
PgITWABI
:?1:I Systen Virtual Storage Exrended (DOS./VSE), proqram no.
9q:.ating
5 7 l l5 - 0 2 0 , i s t h e s y s t e m c o n t r o r p r o g r a m n o r m a r l y u s e d
wi-th thr:4300
'Processor models ri- and J1 . The- ri6ensed program vsE,zAdvanceFunctions' program_(5746-xE8), is reguired-foi the installation
program products of the
listed below. the uie of Advanced Functions
the necessary interface 1>rovi-des
to the progran products arong with enlancements
to the basic functions of the system control program (Dos,/vsE). The
'cescription
'VSE,/Advanced f Dos,/vsE in this
o manuar assumes the installation of
Functions.
The 4300 Processor provides for the use of a wide range of sys;tem and
;lpprication programs. The following is a partiar tist of the'Srrograms
,evai.Iable for use with the q300 processor.
These programs will. be
referenced i.n the manual.
System,/3 to D O S , / V S EC o n v e r s i o n cuide
Li censed Proqrams
V S E , / A d v a n c e dF u n c t i o n s . ....5746-XE8
V S E , / P O W Ew i t h o p t i o n a l - R e m o t e J o b E n t r y F e a t u r e .
R ...57 46-XE3
VSE/Virtual Storage Access Method. .. .5746-AM2
VsE./Interactj-ve Computing and Control Facil-ity. . . .. .5746-T51
-
V S E . / I B MS Y S T E M , / 3 3 3 q 0 D a t a I m p o r t . . . ....5746-A143
VSE/Data Interfile Transfer, Testing and Operations Utility...5746-UT3
DOS./VS PG II rel-ease 3....
R 5746-RG1
System./3 DoS,/vS RPG II Conversion Preprocessor. 5735-cV1
D O S . / V SC O B O L a n d L i b r a r y . . . 5746-CB1-
DoS FORTRAN V Library I option I.. . . . .5746-LI43
D O S . / V SS o r t , / M e r g e Versi-on 2. . . . 5746- SM2
C L C S / D O S / V S ... .. .57rt6-XX3
BTAl"r-E:i 5746-RC5
Not Li-censed
DOS FORTRAIT IV Compiler . 3 6 0 N - F O -q 7 9
DOS FORTRAN IV Lj-brary. .360N-LM-480
As s emlrler
CONVERSION
You may be planning a transition fronr the System/3 to a 4300 Processor
for a ;rumber of reasons, such as:
. Program compatibility with the SYSTEI4/3'|0
. Greater growth capabili-ty of the 4300 Processor l-ine
. Api:lication growth
. Corporate standardization
As your company gro\^rs, you make greater use of your comFuter system for
the steadily increasing volunre of data. More information must be
processed on customers, stock parts, general Iedger acccunts, etc. This
may mean that you are outgrowing your System,/3 in several areas, such as
m o r , t o r } /s i z e , t h e n u m b e r o f p a r t i t i o n s available for processing programs,
tlisk capacity, print speed, online capability,etc. The 4300 Processors .
with its wide range of processor models and Lzo devices, mdy provide the
answer to your data processing needs.
If you are runnirlg more and increasingly complex applications, you nay
have a need for improving the integration of all of ycur applicati-ons.
The 4300 processor has a wide ranqe of software to assist you. Data
base management systens such as DL/I can help you organize and integrate
y o u r c o m p a n y ' s d a t a ; d a t a c o m m u n i c a t i o r ) s s y s t e m s s u c h a s C I C S / D O S , / V Sc a n
help you provide timely information to your company's executives; query
p r o q r a r r s s u c h a s G I , S , / V Sc a n f a c i l i - t a t e processing one-tilne requests f cr
in formation.
You may be plannirg a t-ransitiorr f r o m y o u r S y s t e m , / 3 t c e L4 3 0 0 F r o c e s s o r
because of corporate standardization. If you currently have a mixed
S y s t e m , / 3 a n d S Y S T E I 4 / 3 1 0e n v i r o n m e n t , your data processir,g department Inai/
be more prcductive anrf less costly to operate wi-th only one type of
coiirputer system. You can thus realize benefits from central progran
development and maintenance, as wel-I as full data compatibj-lity.
Whatever the reasons you are planning to upgrade, the 4300 Processor may
provide additional capabilities that benefit you, depending upon which
model and confiquration of System/3 you have.
a Growth potentj-al within the 4300 Processor family
a Higtrer DASD capacity
a More partitions
a Data base offering
a More f lexible data comnrunicati-ons
a Universal- progran, Iibrary
Cnapt,r 1-. Overview
This rnanual provides the information you will need to plan and i.mplement
conversion- You may_currently have a System,z3 running Latcn appfii:tions,
or a system/3 with data communications. Each of thes6 areas i3-addressed
separately to clarlfy
he compatibilities
t h e S y s t e m . / 3 a n d t h e 4 l3 0 0 p r o c e s s o r .
and incompatibilities between
System,/3 to DOS./VSE Conversion Guide
CiiAPTER 2. DOS,/VSE AND SYSTEM,/3 CHARACTERISTICS AND DIFFERENCES
Tlei.s chapter presents the major differences between the q300 Processor
using DOS,/VSE ith ACvanced Functions
w and the System/3 using Disk System
lvlitnagerrent (DSf4). ft is meant to provide an overview of DOS/VSE and
g:Lve technical direction that wilI help your data processing personnel
to understand the conversion activity. It does not include the detailed
information needed to convert frorn DSM to DCS./VSE. This is supplied in
l;rter chapters.
D : t S K O P E R A T I N G SYSTE}{,/VIRTUAL STORAGE E X T L N D E ] ] ( DOS/VSE )
DOS/VSE is a group of orograms designed to make ful-l use cf t.he
resources of a data processing systern usinq the 43C0 Procrssor hardware.
The basic functions of DOS/VSE, how they work, are conparaLble to the
S'ystern,/3Disk Systen Management (LSM). Sometimes the nanres of the
programs are the same. The major differences a r e t h a t D O S . / V S Eh d s m o r e
fronctions and that there is a different method used in conrmunicating
with the 4300 Processor: DSM uses operation control language (OCL);
D { I S , / V S Eu s e s j o b c o n t r o l language (JcL). oCL and JCL perf orm basically
the sarne functions.
Figure l- shows the operational functions and components of DSM, their
fr,rnctional equivaJ-ents in DOS./VSE, and a summary of the ailditional
functions and components availabl-e with DOS/VSE. The Syst:m,/3 DSM
fr:nctions presented are based on the facilities avaiLable with the Model
15. (The t"todel L0 does not provide sone of these functicns.)
You can st:e from Figure l that all System./3 DSI{ functj-ons are available
in DOS./VSE. This does not imply that all components f\lnction in exactly
t.he same way in DOS,/VSE and DSIvi. In general , DOS,/VSE systerm control-
p:roqrams have more capabilities t h a n L r S Ms y s t e m c o n t r o l - p r o g r a n s , and
they rnay be used in different ways. This is alsc true of IBM-suppli-ed
p.rogram products. You should not expect to find the same rLumber of
programs or identical p r o g r a m n a m e s i n t h e D O S , / V S Ep r c a r a n l l i b r a r y .
,
I ] C S , / V S E S Y S T E MF U N C T I O N S
The fol-lowing is a brief discussion of the specifj.c DOS/VSE furrctions
ttlat are of interest when moving fronr a System./3 disk syst:em to a 4300
Processor with DOS,/VSE,and their relationship to the corr:esponding DSM
f uncti-ons.
C'CNTROLPROGRAMS
Control programs are designed to sche<1ule and supervj-se the performance
of data processing work by a corrputing system. DOS,/VSEprc>vides several
controL programs.
Supervisor
A s o n t h e S y s t e r n , / 3 , D O S , / V S Ep r o b l e m p r o g r a n r s a r e e x e c u t e d u n d e r c o n t r c l
of a srrpervisor, the major control program of the system. The basic
functions and operational characteristics of the two super:visors are the
same, but the DOS,/VSE ff ers addi-tiorral f uncticns,
o especi;tlly j-n the
a.rea of resource manaqement.
Chapter 2. DoS,/vSl. anC System/3 CharacterisLics atld Dif f erences
Some of the enhancements that DOS,/VSE with Advanced Functions provicles
are:
r Virtual, storage
. MuIti-tasking
. \y'ariable partition priority
. llelocating loader
. ilob to job communications area
. Automateci Systems Initial_ization
. Asynchronous Operator Communication
r--------- -----T--- ----------T
I Fr.rNcTIoN or col"lpoNENTl sysTEM./3 i 4300
IPL
Servjce Programs
Supervisor Supervisor
Operator Control Job ControL
Language (OCL) Language (JCL)
Data Management Data Managernent
Spool ino VSE./POWER
Librarian L ibr arian
Systern Util ities System Utj"li-ties
Overlay Li-nkage Linkage Editor
Editor
Sort DOS./VS Sort./'Merge
File to F'ile VSE./VSAIVI AC(:ESS
Uti-lities Ivlethcd Servi.ces
DITTO