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File No. S370-37
Order No. SV20-0882-4
IBM. Virtual Machine
Facility /370:
Service Routines
Systems Program Logic
I Release 6 PLC 1
This publication describes the program logic for the
VM/370 service routines. Each service routine (or
group of routines) is described in its own chapter.
Each chapter contains an introduction, a method of
operation section, a program organization section, a
directory, a data areas section, and a diagnostic aids
section, if the section is applicable.
The service routines that are described in this
publication are: the I BCDASDI Virtual Disk
!nitialization Program, the Interactive Problem Control
System OPCS), the Format Service Program, the DMKDI R
Directory Program, the Installation Verification
Procedure, the Procedures for Generating and Updating
VM/370, the VM/370 Starter System, the 3704/3705
Service Programs, the ZAP Service Program, the
EREP/Error Recording Interface, the MSS
I Communicator, and the IEBIMAGE Interface.
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!ift~ ]giti2B (March 1979)
This is a major revision of 5Y20-0882-3 and .akes obsolete that editien
and Technical Newsletters 5125-0402, dated August 31, 1977, 5N25-0415,
dated December 15, 1977, and 5N25-0440, dated July 15. 1978. This
edition corresponds to Release 6 Ptc 1 (Progra. Level Change) of lEft
Virtual Machine Facility/370, and to all subsequent releases unless
otherwise indicated in new editions or Technical Newsletters.
Extensive changes have been made to this publication; therefore, the
user should read it in its entirety.
Changes are Feriodically .ade to the infor.aticn herein; before using
this publication in connection with the oFeration cf IBM syste.s.
consult the latest !~~ ~st~!L~lQ ~ibli~gI~Ehl, Crder Nc. GC20-000l. for
the editions that are aFplicable and current.
Publications are not stocked at the address given below; requests fer
copies of IBM publications should be .ade to your IBft representative er
to the IBM branch office serving your locality.
A form for readers' com.ents is provided at the back of this
Fublication. If the for. has been removed, com.ents .ay be addressed to
IEM Corporation, YM/370 Publications, Dept. D58. Bldg. 706-2, P.O. Bex
390, Poughkeepsie, New York 12602. IBM may use cr distribute any of the
information you supply in any way it believes appropriate without
incurring any obligation whatever. You .ay, of course, continue to use
the information you supply.