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File N-o. 8370-36
Order No. 8Y20-0884-3




IBM Virtual Machine
Facility/370:
Data Areas and Control
Systems Block Logic
I Release 6 PLC 1


This publication, together with the VM/370 System Logic
and Problem Determination Guide, Volumes 1, 2, and 3,
is intended for use by system programmers responsible
for updating VM/370. This publication contains
descriptions of the major data areas and control blocks
used by three of the components of VM/370, the Control
Progra...TTI (CP), the Conversational Monitor System (eMS),
and the Remote Spooling Communications Subsystem
(RSCS).

To use this publication effectively and to understand
it thoroug.llly, the following publications are
prerequisite:

IBM System/370 Principles of Operation
Order No. GA22-7000
IBM OS/VS, DOS/VS, and VM/370Assembler Language,
Order No. GC33-4010




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This is a aajor revision of, and obsoletes. 5120-0884-2 and Technical
Bewsletters 5B25-0413, 5125-0453, and 5125-0466. This edition applies
to ~~!~