IBM System/370 145 User manual

Systems
GC20-1734-2
A Guide to the
IBM System/370
Model 145
This guide presents hardware, programming systems,
and other pertinent information about the
IBM Sys-
tem/370 Model 145 that describes its significant new
features and advantages. The contents are intended
to acquaint the reader with the Model 145 and
to be
of benefit in planning for its installation.
Associated with this guide are four optional supple-
ments that describe operating systems for the
Model 145 that support a virtual storage environment.
Each supplement has its own form number and must
be ordered individually, if required. Optional supple-
ments are the following:
• DOS/Virtual Storage Features Supplement*
• as/Virtual Storage 1 Features Supplement
(GC20-1752)
• as/Virtual Storage 2 Features Supplement
(GC20-1753)
• Virtual Machine Facility/370 Features Supplement*
*Availability to be announced

Third Edition (August 1972)
This
is a major revision obsoleting GC20-1734-1. Text has been added or changed to in-
clude information about the following: EC mode; dynamic address translation; channel
indirect data addressing; program event recording; CPU timer and clock comparator; new
System/370 instructions; store status facility; integrated storage control for 3330-series
disk storage; 3830 Storage Control Model 2; virtual storage concepts, advantages,
terminology, and performance factors; DOS/VS, OS/VS1, and OS/VS2 support of
Model 145 hardware features; DOS Version 4 support; and miscellaneous additions and
corrections. Changes to the text and illustrations are denoted by the vertical line to the
left
of the change. In addition, this publication is now structured as a base publication
for which optional programming systems supplements describing virtual storage operating
systems can be ordered.
This guide
is intended for planning purposes only. It will be updated from time to time;
however, the reader should remember
that the authoritative sources of system informa-
tion are the system library publications for the Model 145, its associated components and
its programming support. These pUblications will first reflect any changes.
Requests for copies of IBM publications should be made to your IBM representative or to
the
IBM branch office serving your locality.
A form has been provided
at the back of this publication for readers' comments. If this
form has been removed, address comments to: IBM Corporation, Technical Publications
Department, 1133 Westchester Avenue, White Plains, New York 10604. Comments become
the property of IBM.
© Copyright International Business Machines Corporation 1970, 1971, 1972

PREFACE
It is assumed that the reader of this publication is familiar with
System/360. The reader should have a general knowledge of System/360
architecture, channels, I/O devices, and programming systems support.
This guide highlights only those Model 145 hardware, I/O, and
programming systems features that: are different from those of system/360
models and discusses their significance. This publication applies to
systems with 60-cycle power.
The total Model 145 guide consists of this base publication (Sections
01 to 70), which covers virtual storage concepts and Model 145 hardware
and I/O devices, and from one to four optional supplements (Sections 80
to 110). The optional supplement:s describe the facilities of the IBM
operating systems that support a virtual storage environment using the
dynamic address translation hard~rare of the Model 145. Each optional
supplement has its own unique form number and each supplement desired
must be ordered separately and inserted in this base publication, which
is distributed without the automclltic inclusion of any optional
supplements.
The following optional supplements can be inserted in this base
publication:
• DOS/Virtual Storage Features Supplement* - assumes knowledge of DOS
Version 4
• as/Virtual Storage 1 Features: Supplement (GC20-1752) - assumes
knowledge of as MFT
• as/Virtual Storage 2 Features: Supplement (GC20-1753) - assumes
knowledge of OS MVT
• Virtual Machine Facility/370 Features Supplement*
All optional supplements also assume knowledge of virtual storage,
dynamic address translation, and other new Model 145 features as
described in this base publication or appropriate system library
manuals. However, no optional sUlpplement requires knowledge of the
contents of any other optional su.pplement.
This base publication, as well as each optional supplement, begins
with page 1 and includes its own table of contents and index. The base
publication or supplement title is printed at the bottom of each page as
a means of identification.
*Availability to be announced
A Guide to the IBM System/370 Model 145

The optional programming systems supplements contain System/370
model-independent information. unless otherwise noted, and are designed
to be included in the guides for System/370 Models 135, 145, 158, and
168 as shown below.
Supplements
DOS/VS OS/VS1
OS/VS2
VM/370
Features Features Features
Features
Base Supplement Supplement
Supplement Supplement
Publications
(*>
(GC20-1752)
(CGC20-1753)
(*)
A Guide to the IBM
System/370 Model 135 X X X
(GC20-1738-4 or later
editions)
A Guide to the IBM
system/370 Model 145 X X X X
(GC20-1734-2 or later
editions)
A Guide to the IBM
System/370 Model
158
X X X X
(GC20-1754)
A Guide to the IBM
System/370 Model 168 X X X
(GC20-1755)
Additional, more detailed information regarding System/370 Model 145
hardware and programming systems support can be found in system library
publications.
*Availability to be announced
A Guide to the IBM System/370 Model 145

CONTENTS
Base Publication sections (01 to 10)
section 01: System Highlights ••
Section 10: Architecture Design. System Technology, and System
Components • • • • •
10:05 Architecture Design and system Technology.
Architecture Design.
system Technology. a • • • •
Major Components • • • • • •
10:10 The Central Processing Unit (CPU) •••
Control Registers. •
Basic Control Mode •
Extended Control Mode. •
Expanded Instruction Get
Byte-Oriented Operands •
Monitoring Feature • • •
Architecture Implementation Alterations. • • • • •
Interval Timer • • • • • • • • •
Time of Day Clock. • • • • • • •
Clock Comparator and CPU Timer •
10:15 storage and the Console File.
10:20
10:25
10:30
10:35
Control and Processor (Main) Storage •
The Console File • • • •
Channels • • • • • • • • •
Byte Mul t.iplexer Channel
Integrated File Adapter.
Selector Channels. • • •
Block Multiplexer Channels • .
..
Block Multiplexing Operations with Rotational Position
Sensing Devices. • • • • • • • • • • • • • • • • • •
summary of Block Multiplexing Operations with I/O
Devices. • • • • • • • • • • • • • • • • • • • • •
system Control Panel and System Console ••
System Control Panel • •• • • •
System Console • • • • • • • • • •
standard and Optional System Features. •
Standard Features. • • • • •
Optional Features. • • • • • • • • •
Section 15: Virtual Storage and. Dynamic Address Translation.
15: 05 Virtual Storage Concept.s. Advantages, and Terminology.
The Need for Larger A.ddress Space. • • • • • '. • •
Virtual storage and Dynamic Address Translation
1
9
9
9
10
13
14
14
14
15
20
21
21
22
22
23
23
24
24
21
29
30
30
31
32
31
40
41
41
41,
42
42
43
44
44
44
Concepts • • • • • • • • • .. • • • • • .• • • ... • • 48
General Advantages Of'fered by IBM Operating Systems
that Support a Virtual Storage Environment • • • • 54
Virtual Storage and Dynamic Address Translation
Terminology. • • • • • • • • • • '. • •• • • • • • • 61
15:10 Dynamic Address Translation Facility for the Model 145 66
Virtual Storage Organ.ization • • • • • • • • • • • 66
Operation of Dynamic Address Translation Hardware. 61
Features to Support Demand Paging. • • • • • • • • 14
Channel Indirect Data Addressing • • •• • • • • • 16
15:15 system Performance in a Virtual storage Environment. 18
System Resources Required to Support a Virtual
Storage Environment. • • • • • • • • • • • • • • • 19
New Factors that Affe!ct System Performance • .• • '. 82
Relationship Between Virtual Storage Size and System
Performance. • • • • • • • • • • • • • • • • • • • • •• 85
A Guide to the IBM System/370 Model 145

Increasing system Performance in a Virtual Storage
Environment. • • • • • •
89
section 20: I/O Devices. • 94
20: 05 I/O Device Support. '. • • • 94
20:10 3330-Series Disk Storage. • • • • 95
3330 Disk storage and 3333 Disk Storage and Control. '.. 95
3830 Storage Control • • • • • • • • • • '.. 97
Integrated Storage Control • • • • • • • • 101
summary. • • • • • • • • • • .• • • '. • • • 1 03
20:15 The 2305 Fixed Head Storage Module and 2835 Storage
20:20
20:25
20:27
20:30
Control Model 2. • • • • • • • • • • • • • •
Data Recording • • • • • • • •• .
Rotational Position Sensing and Multiple Requesting ••
The 3211 Printer •••••••••••
The 3803/3420 Magnetic Tape subsystem.
The 3410/3411 Magnetic Tape subsystem.
The 3505 Card Reader and the 3525 Card Punch •
The 3505 Card Reader • • • • • • • •
The 3525 Card Punch • • • • • • • •
Error Recovery Procedures for the 3505 and 3525
Maintenance ••••
summary • • • • • • • • •
103
103
• 105
108
110
121
• 128
131
135
• 138
140
142
Section 30: Programming Systems Support of the Model 145 in
BC Mode. • • • • • • • • • • •
30:05 Trends in Data Processing and Programming Systems ••
30:10 OS MFT and MVT Support ••
30:15 DOS Version 4 Support ••••••••••
Section 40: Emulators....... • • • • • • ••
40:05 OS 1410/7010 and 1401/1440/1460 Emulator Programs. '.
Features Common to Both Emulators. • •
OS 1410/7010 Emulator Program Support. .. • • •••
OS 1401/1440/1460 Emulator Program Support ••••
40:10 DOS 1401/1440/1460 and 1410/7010 Emulator Programs •
Features Common to Both Emulators. • • • • • •
DOS 1401/1440/1460 Emulator support. • • • ••
OOS 1410/7010 Emulator Support •••• ' ••••
40: 15 OS DOS Emulator Program. • • • • • • • • • • • '.
Emulator Job Submission and General Operation.
I/O Device Staging and Sharing • • • • • • • •
Installation of the OS DOS Emulator. • • • • • • •
Section 50: Reliability, Availability, and Serviceability (RAS)
145
145
• 146
152
158
158
158
163
166
169
169
172
175
177
• 179
180
• 182
Features • • • • • • • • • 185
50:05 Introduction... • • • • • • • • • • • 185
50:10 Recovery Features. • • • • • • 186
Automatic Microinstruction Retry • • • • 186
ECC Validity Checking on Processor and Control Storage • 187
I/O Operation Retry. • • • • • • • 189
Expanded Machine Check Facilities. • • • • • • • • • 190
Machine Checks on System/360 Models 30 and 40. • 196
Recovery Management Support (RMS) for OS MFT and MVT • • 196
Error Recovery Procedures (ERP's) for OS • • • 199
statis,tical Data Recorder (SDR) and Outboard
Recorder (OBR) for OS. • • • • • • • • • 199
Environment Recording, Edit, and Print Program (EREP)
for OS • • • • • • • • • • • • • • •
I/O RMS for OS • • • • • • • • • • • • • • • •
Advanced Checkpoint/Restart and Warm Start Facilities
199
199
for OS • • • • • • • • • • • • • • • • • • • • • •• 200
Recovery Management Support (RMS) for DOS Version 4. • • 201
Error Recovery Procedures (ERP's) for DOS Version 4 ••• 203
A Guide to the IBM System/370 Model 145

50: 15
50:20
Recovery Management Support Recorder (RMSR) for DOS
Version 4. • • • • • • • • • ••• '. • • 204
Environment Recording', Edit, and Print program (EREP)
f or DOS Versions 3 and 4 • • • • • • • • • • '. • • • 204
Checkpoint/Restart Fa.cilities for OOS. • • • • • • • 205
Repair Features. • • •
OLTEP
and OLT's - OS and DOS
Microdiagnostics •
RAS Summary. • • • • •
• • •
205
• • • 206
• 207
• 207
Section 60: Programming Systems Preinstallation Planning for the
Model 145 in BC Mod.e • • • • • • • • 208
60:05 General Considerations. • • • • • • • • • • • • • •• 208
60:10 OS MFT and MVT Transition. • • • • .. • • • • • • • 210
Existing OS Processin.g Programs and Job Control ••••• 211
Conversion to 3330-Se'ries and 2305 Disk storage. • • 211
Conversion to the 3410/3411 and 3803/3420 Magnetic
Tape Subsystems. • • • • • • • • • • • • • • '. • • • • • 212
Conversion to the 3505 Card Reader and 3525 Card Punch • 213
60:.15 Planning Optimal system Performance, Using Block
60:20
60:25
60:30
60:35
Multiplexer Channels an.d Rotational position
sensing Devices. • • • • • • • • • • • • • • • • • •
system Configuration and Generation. • • '. •
Job scheduling • • • • • • • • • • •
Data Management Parameters • • •
OS MFT and MVT Portability • • •
Transition to DOS Versi.on 4 •••••••••••
DOS Versions 3 and 4 Portability
Use of Other Programming Systems •
•
213
• • • 213
.. 214
• 216
• 217
• • • 219
• • • 221
• • • 222
Section 70: Comparison Tables of Ha.rdware Features and Programming
Support - System/360 Models 30 and 40 and System/370
Model 145. • • • • • • .. • • • • • • '. • • '. • • • • • 224
70:05 Hardware Features of Models 30, 40, and 145 and DOS
Version 4 and os (MFT and MVT) Support of the Model 145 •• 225
70:10 DOS/VS, OS/VS1, and OS/VS2 Support of the Model 145
Operating in EC and OAT' Modes. • • • • • • • • 231
Index (Sections 01 to 70) • •
234
Optional Sections (See each supplement for detailed contents and index)
Section 80: DOS/Virtual Storage~ Features • •
245
Section 90: as/Virtual Storage 1 Features.
.. • • 247
Section 100: as/Virtual Storage~ 2 Features • • • • •
249
Section 110:
Virtual Machine Facility/370 Features • • • •
251
I FIGURES (Sections 01 to 70)
10.05.1
10.05.2
10.05.3
10.05.4
10.10.1
10.10.2
10.15.1
SLT substrate. • • • • • • .'. • '. • • '. • • •
Monolithic storage array module containing 512 bits.
Monolithic storage array card containing 12K bits,. •
Basic storage module of the Model 145 containing 48K
bytes of monolithic storage. • • • • • •• • • • • •
BC and EC. mode PSW formats • .. • • • • • • '. • • • •
Model 145 model-independent fixed storage locations
for BC and EC modes. • • • • • • • •
Model 145 physical layout.. • • • • • • • • • • • • ,.
A Guide to the IBM System/370 Model 145
11
13
13
13
16
17
25

10.15.2
15.05.1
15.05.2
15.05.3
15.05.4
15.10.1
15.10.2
15.10.3
15.10.4
15.15.1
15.15.2
15.15.3
15.15.4
15.15.5
20.10.1
20.10.2
20.10.3
20.15.1
20.15.2
20.25.1
20.27.1
20.27.2
20.30.1
20.30.2
20.30.3
20.30.4
20.30.5
40.05.1
40.15.1
40.15.2
50.10.1
50.10.2
50.10.3
50.10.4
50.10.5
50.10.6
Disk cartridge for the console file. • • • • • • • • •• 28
Names and location of instructions and data in a virtual
storage environment. .. • • • • • • • • • • • • • • • •• 50
Relationship of virtual storage, direct access storage,
and real storage • • • • • • • • • • • • • • • • • • •• 51
Conceptual illustration of real'storage utilization in
a mixed batch and online virtual storage environment •• 60
Layout of virtual storage, external page storage, and
real storage • • • • • • • • • • • • • • • • • • • • •• 63
Virtual storage address fields for a 64K segment • • •• 68
segment table and page tables used for dynamic address
translation. • • • • • • • • • • • • '. • • • • 70
Dynamic address translation procedure. • • • • • • • •• 71
Example of IDAL's required for a CCW list when page
size is 2K • • • • • • • • • • • • • • • • • _ • • • •• 77
Possible system performance when a virtual storage
operating system is used with an existing Model 145
configuration. • • • • • • • • • • • • • • • • • '. • 81
General effect on page faults of increasing the ratio of
the virtual storage used to the real storage present
in the system. • .. • • • • • • • • • • • • • • • _ 86
General effect on system performance of the paging
factor only. • • • • • • • • • • • • • .• • • •
87
General effect of the paging fact:.or on system
performance for various active-to-passive page ratios.. 88
General system performance curve for a virtual storage
environment. • • • • • • • • • • • • • • • • •
3330-series disk storage attached to 3830 Storage
Control Modell. • • • • • • • • • • • • • • • • •
A Model 145 configuration with 3330-series disk
storage attached via 3830 Storage Control Model 2.
A Model 145 configuration with 3330-series disk
89
97
100
storage attached via integrated storage control. • • 101
Top view of a 2305 Model 2 disk surface. • • • • • 104
Multipie requesting on the 2305 facility • • • • • • 106
Tape switching configurations for the 3803/3420 Magnetic
Tape subsystem • • • • • • • • • • • • • • •
The 3410 Magnetic Tape Unit. • • • • • • •
3410/3411 tape subsystem physical layouts,.
The 3505 Card Reader • • • •
The 3525 Card Punch • • • • • • • •
Vertical mark card format
Card layout for 25 print lines • • • '. • •
Contents of operator panels for 3505 reader and
3525 punch • • • • • • • • • . • • . . '. • • • . •
Partition or region layout for an OS 1400/7010-series
emulator program job step, with general storage
115
122
123
129
129
133
137
141
requirements indicated • • • • • • • • • • • • • '. • • • 159
Sample 256K Model 145 configuration for emulation of
a 128K DOS system •••••••••••••••••••• 184
Sample 160K Model 145 configuration for emulation of a
48K
DOS system • • .. .. • •• • • • • • • • • • .. • • • • 184
Data representation used in Model 145 processor and
control storage •••••••••• ' •• ' •••••• , ••• 188
Data representation used in Models 30 and 40 processor
storage and in the Model 145 in other than processor
and control storage. • • •• • • • • •• • • • • • 188
Model 145 model-dependent fixed storage locations. • '. • 191
Model 145 machine check code • • • • • • • • • • • • • • 193
General flow of OS MCR processing after repressible
machine check conditions • • • • • • • • • • • 198
General flow of os error recovery procedures after an
I/O interruption • • • • • • • • • • • • • • • 201
A Guide to the IBM Systern/370 Model 145

TABLES (sections 01 to 70)
10.15.1
10.20.1
10.20.2
15.10.1
15.10.2
20.10.1
20.10.2
20.10.3
20.15.1
20.15.2
20.15.3
20.25.1
20.25.2
20.27.1
20.30.1
20.30.2
20.30.3
40.05.1
40.05.2
40.05.3
40.05.4
40.05.5
40.05.6
40.05.7
40 .. 05.8
40.10.1
40.10.2
40.10.3
40.10.4
40.10.5
Total control storage requirements for sample Model 145
hardware configurations. • • • • • • • • • .. • • • • •• 27
Sample Model 145 I/O configurations without the Channel
Word Buffer feature installed. • • • • • • • • • • • ... 33
sample Model 145 I/O configurations with the Channel
Word Buffer feature installed. • • • • .. • 4O4O • '4O • 4O4O 33
Number and size of segments and pages for a 16-million-
byte virtual storage .. .. .. • • .. • I. ,4O '4O • • • • • • "4O 67
Virtual and real storage addresses used by and supplied to
programs in the Model 145. • • • • • • • • • • • f40 73
Capacity and timing characteristics of 3330-series and
2314 disk storage and the 2321 Data Cell Drive • • • 4O" 96
3336 and 2316 Disk Pack characteristics. • • '4O • • • .4O 97
Hardware features of 3330-series and 2314 disk storage • 102
2305 Model 2 facility and 2303 Drum Storage
characteristics. • • .. • • .. • • • • • • • • • • 106
Effective capacity of the 2305 Model 2 and the 2303
for various block sizes with a 25-byte key .. • 108
Effective capacity of the 2305 Model 2 and the 2303
for various block si.zes when records are written
without key. .. • .. .. • • • • .. • • .. • • • .• '. • • • '. • 108
3803 €ontrol unit configurations and capabilities with
Single Density, Dual Density, and Seven Track features • 114
3420 and 2401 Magnetic Tape Unit characteristics '. 118
3410, 2401, and 2415 Magnetic Tape unit
characteristics. .. • .. .. .. • • .. • .. • .. • • • 125
3505 Card Reader and 3525 Card Punch features 130
3525, 557, and 1404 Icard-printing capabilities • • 139
3505 reader, 3525 pwnch, and 2540 reader/punch
feature comparison .. .. .. .. • • • .. • .. .. • • • 143
1410/7010 system feat.ures supl:Jorted and unsupported
by the Model 145 OS 1410/7010 Emulator program. '4O • 164
1410/7010 I/O devices and features emulated by the
OS 1410/7010 Emulato:[' program and their Model 145
equivalents. .. .. • .. • .. .. .. • • .. .. .. .. .. • • • • 165
1410/7010 I/O devices not supported by the Model 145
OS 1,4 1 0/701 0 Emula tOj[, program. • .. '. • • • '. '. '. ... 165
Model 145 direct accless device requirements for
emulation of 1410/7010 disk devices using OS with and
without the Track OVlerflow feature • .. '. • .. .. • • 166
1401/1440/1460 system features supported by the
Model 145 OS 1401/141~0/1460 Emulator program ........ 167
1401/1440/1460 I/O dlevices and features emulated
by the ,OS 1401/1440/1460 Emulator program and their
Model 145 counterparits • • • • .. • .. • .. .. • '4O .. •• 167
1401/1440/1460 I/O dievices and features not supported
by the Model 145 OS 1401/1440/1460 Emulator program. • • 168
Model 145 direct accless device requirements for
emulation of 1401/141~0/1460 disk devices using os
with and without the Track overflow feature. • • • • 168
1401/1440/1460 I/O dievices and features supported by
the DOS 1401/1440/14450 Emulator program and
corresponding Model 145 devices. .. • • '. .. • • • • 174
1401/1440/1460 CPU fieatures supported by the OOS
1401/1440/1460 Emula1tor program ...... '4O • • .. 174
1401/1440/1460 devicies not supported by the DOS
1401/1440/1460 Emula1tor program ..... ' ............. 175
1410/7010·1/0 devices and features supported by the
OOS 1410/7010 Emulator program and corresponding
Model 145 devices. • .. .. ,4O .. .. • • '. • • .. • 176
1410/7010 CPU featuri~s supported and unsupported by the
DOS 1410/7010 Emulator program. • ••••• ' ..... 176
A Guide to the IBM System/370 ~)del 145

40.10.6
50.10.1
1410/7010 devices not supported by the DOS 1410/7010
Emulator program • • • • • • • • • • • •
Model 145 machine check interruptions.
176
192
A Guide to the IBM System/370 Model 145