IBM System/360 20 User Manual

The program library of a tape-resid,ent sys-
tem can be updated; i.e., program phases
can be included in, or deleted from
J
the
library. Both IBM-supplied and us~r
written program phases may be included or
deleted.
The updating is performed ty an IBM-
supplied service program referred to as the
Core-Image Maintenance (CMAINT) program.
If this program is to be used, it must be
contained in the program library of the
user's tape-resident system.
A program phase can be either a complete
single-phase program or a phase of a multi-
phase program. A phase may have up to 9
subphases. The program phases to be
included in the library can be:
1. phases of IBM-supplied programs;
2. phases obtained as output from the TPS
Report Program Generator;
3. phases obtained as output from the TPS
Assembler program (if they do not
require linking and/or relocation) ;
4. phases obtained as output from the TPS
Linkage Editor program· (if the output
from the Assembler program required
linking and/or relocation).
phases obtained as output from the TPS
Core-Image Service program.
The input phases may be contained either
in punched cards or on tape in card-image
format.
The Core-Image Maintenance program can
also be used to replace the tape Basic Mon-
itor program on the system tape, although
this program is not contained in the pro-
gram library.
I/O DEVICE ASSIGNMENTS
The following symbolic device addresses are
used in preparing and performing thE! execu-
tion of the CMAINT program:
SYSRE5 -- Required. Assigned at IPL time.
Refers to the 9-track tape drive
on which the system tape is
mounted.
SYSRDR -- Required.
Refers to the card reading device
on which the cards containing the
control statements are read.
SYSIPT -- Required if the Easic Monitor is
to be replaced or phases are to
be included in the library.
Refers to the card-reading device
or tape drive on which the Easic
Monitor and/or the phases, ter-
minated by an end-of-file card,
are read.
SY50PT -- Required.
Refers to the tape drive on which
the new system tape (with the
updated program library) is
created.
SY5000 -- Required.
Refers to the tape drive on which
a work tape is mounted.
SYSLOG -- Optional.
Refers to the printer on which
control statements are listed.
Mot§: SYSRrR and SYSIPT may be assigned
the same card reading device.
CCN1RCL STATEMENTS
lhe following job control statements are
used to set up the system for the execution
of the C~AINT program:
// JOB CMAINT Required.
// ASSGN
// EXEC
Required for ani sym-
bolic address whose
device assignment in
main storage must be
changed.
Required.
Any other job control statements need be
issued only if the corresponding functions
are required.
Note: The OPTN control statement must not
be-Included in the job control statements
for the CMAINT program.
The CMAINT program requires the following
control statements:
// MONTR
// CATAL
Required only if the
tape Basic Monitor pro-
gram is to be replaced.
If it is used, it must
be the first control
statement.
Required for each phase
to be included in the
program library.
Creation and Maintenance of System Tapes 59

IBM System/360 20 Specifications

General

Brand	IBM
Model	System/360 20
Category	Storage
Language	English