This publication provides the IBM system
hardware and software support personnel
with the information needed to analyze
problems that may occur on theIBM Virtual Machine Facility/370 (VM/370). This manual ccmprises three volumes: "Volume 1. VM/370 Control program (CP)," "Volume 2. Conversational Monitor System (CMS)," and "Volume 3. Remote Spooling
Communications Subsystem(RSCS)" contain
the logic description for each of the
components. Each of these volumes is
divided into four sections: Introduction,Method of Operation, Directory, and
Diagnostic Aids.
The method of operation andprogram organization sections contain the functions
and relationships of the program routines
inVM/370. They indicate the program operation and organiZation in a general way to serve as a guide in understanding VM/370. They are not meant to be a
detailed analysis ofVM/370 programming and
cannot be used as such.
The directories contain descriptions of
all the assemble modules inCP, CMS, and RSCS. They also contain extensive
cross-references between modules and labels
within aVM/370 component. The diagnostic aids sections contain
additional information useful for
determining the cause of a problem.
The Appendix --which is inVolume 1 -
contains a description ofVM/370 Extended
Control-program Support(ECPS). • Isolate the component of VM/370 in which
theproblem occurred. • Use the list of restrictions in Guide to
be certain that the operationthat-was being performed was valid.
Preface• Use the directories and use the VM/37Q fata and Control Block 10qic to
help you to isolate the problem.• Use the method of operation and program organization sections, if necessary, to
understand the operation thatwas being performed. DEVICE TERMINOLOGY The following terms in this publication
refer to the indicated support devices:• "2305" refers to IB! 2305 Pixed Bead Storage, Models 1 and 2. • "270x
n refers to IB! 2701, 2702, and 2703 Transmission Control Units or the
Integrated Co.munications Adapter(ICA) en the Systea/370 Hodel 135. • "3330
n refers to the IE! 3330 Disk Storage, !odels 1, 2, or 11; the IE! 3333 Disk Storage and Control, Models 1
or 11; and the3350 Direct Access Storage operating in 3330/3333 Model 1
or3330/3333 Model 11 compatibility mode. • "3340
n refers to the IB! 3340 Disk Storage, Models A2, Bl, and B2, and the
3344 Direct AccessStcrage !odel B2. • "3350
n
refers to theIBM 3350 Direct Access Storage !odels 12 and B2 in
nativemode. • "3704", "3105
n
, or "3701" refers to IE!! 3704 and 3705 Communications
Controllers.• The term "3705" refers to the 3705 I and
the3705 II unless otherwise noted. • "2741" refers to the 2741 and the
3767, unless otherwise specified.e "3270" refers to a series of display
devices,namely the IEM 3275, 3276,
3277, 3278 DisplayStations. A specific
device type is used only when a
distinction is required between device
types.
Information about display terminal usage
also applies to theIB!! 3138, 3148, and 3158 Display Consoles when used in display mode, unless otherwise noted.
preface iii
hardware and software support personnel
with the information needed to analyze
problems that may occur on the
Communications Subsystem
the logic description for each of the
components. Each of these volumes is
divided into four sections: Introduction,
Diagnostic Aids.
The method of operation and
and relationships of the program routines
in
detailed analysis of
cannot be used as such.
The directories contain descriptions of
all the assemble modules in
cross-references between modules and labels
within a
additional information useful for
determining the cause of a problem.
The Appendix --which is in
contains a description of
Control-program Support
the
be certain that the operation
Preface
help you to isolate the problem.
understand the operation that
refer to the indicated support devices:
n
Integrated Co.munications Adapter
n
or 11; and the
or
n
3344 Direct Access
n
refers to the
native
n
,
Controllers.
the
3767, unless otherwise specified.
devices,
3277, 3278 Display
device type is used only when a
distinction is required between device
types.
Information about display terminal usage
also applies to the
preface iii