IBM System/360 20 User Manual

Both the program library and the macro
library of a system tape contain entries
that form a directory to their contents.
These directories, which are referred to as
the core-image directory and the macro
directory, respectively, can be listed on
the printer by means of the IBM-supplied
Directory Service (DSERV) program, thus
affoLding a survey of the contents of each
library at any time.
If the DSERV program is to be used, it
must be contained in the program library of
the tape-resident system.
Either one or both of the directories
may be displayed in one job.
1/0 DEVICE ASSIGNMENTS
The following symbolic device addresses are
used in preparing and performing the execu-
tion of the DSERV program:
SYSRES -- Required. Assigned at IPL time.
Refers to the 9-track taFe drive
on which the system tape is
mounted.
SYSRDR -- Required. Refers to the card
reading device on which control
cards are read.
SYSL5T -- Required. Refers to the printer
on which the directories are
listed.
SYSLOG -- Optional. Refers to the printer
on which control statements are
listed.
CONTROL STATEMENTS
The following job control statements are
used to set up the system for the execution
of the DSERV program.
II JOB DSERV
II ASSGN
II EXEC
Required.
Required for any sym-
bolic address whose
device assignment in
main storage is to be
changed.
Required.
Any other job control statements need be
issued only if the corresponding functions
are to be requested.
Note: The OPTN control statement ~ust not
be-Included in the job control statements
for the DSEEV program.
The following control statements are used
to supply information to the DSERV program.
II DSPLY CD
II DSPLY MD
II ])SFLY CD,!':D
or
II DSFLY l1D,CD
or
II DSFLY All
Required if the core-
image directory is to
be displayed.
Required if the ~acro
directory is to be
displayed.
Re]uired if both
directories are to be
displayed.
II END Required. Must be the
last program control
statement.
~2!~: Only one DSFIY control statement is
used.
PREPARATION OF THE SYSTEM
The following steps must be taken to pre-
pare the system for the execution of the
DSERV program.
1. If the TPS Basic Monitor program is not
yet in main storage, follow the proce-
dure described in the section 1h~1~Eg=
]gEig~B!_~1§1gID·
2. Place into the hopper of the device
assigned to SYSRDR:
a} the cards containing the job control
statements,
b} the cards containing the 'program
control statements for the DSERV
program.
Press the Start key of the device.
3. Install forms in the printer; press the
Reset key and the Start key of the
device.
4. Press the Start key on the CPU console.
DESCRIPTION OF OUTPUT
The output from the DSERV program is a list
of the entries contained in the directory
(or directories) specified in the DSPLY
central statement.
62 System/360 Model 20 TPS Operating Procedures

IBM System/360 20 Specifications

General

Brand	IBM
Model	System/360 20
Category	Storage
Language	English