IBM System/360 20 User Manual

MQig: The information (including possible
comments) contained in a jot control
statement must not extend beyond column
71.
ORDER OF INPUT
Job control statements are read on a
device whose symbolic address is SYSRDR.
Normally, the first statement of a set of
job control statements for a particular
job is a JOB statement. Only the PAUSE,
LOG, and NOLCG statements may precede a
JOB statement. The last statement of a
set of job control statements must be an
EXEC statement.
Except where noted, the remaining con-
trol statements of a set may be arranged
in any order between the JOB and EXEC
sta te me nts.
FUNCTIONS AND FORMAT OF JOB CONTRCL
STATEMENTS
The function and format of each type of
job control statement is described in
detail in the following sections.
The ASSGN control statement is used to
assign an actual I/O device address to
specific symbolic I/O device address.
is also used to "unassign" a symbolic
device address, i.e., remove an entry
the logical unit table.
a
It
I/O
from
The ASSGN control statement has one of
the following formats!
r--~---------~ ,
IName 10p.Code I Operands I
',I I -I
1// IASSGN ISYSxxx,X'cuu',dd I
J----+------+ -I
1 / / I ASS G N I S Y Sx xx , X ' c u u ' , d d , X ' s s ' I
J I +------------------1
1// IASSGN ISYSxxx,UA I
L----~ __________ L- __ _
SYSxxx
-~his operand s~ecifies the symbolic
I/O device address to which an actual
device address is to be assigned, or
which is to be unassigned.
The symbolic device addresses used are
listed in Figure 51, in the order in
which they appear in the logical unit
table.
X'cuu
1
--ThIs operand spec~I~es the actual I/O
device address in hexadecimal nota-
tion: c is the attachment-point spe-
cification, uu is the unit-number spe-
cification. The following specifica-
tions are used.
f
1
2501 Card Reader
2
2560
MFCM, or
2520 Card Read-Punch, or
2520 Card Punch
3
1442 Card Punch
4
1403 Printer or
2203 Printer
7
2415 lIlagnetic Tape
I:rive
J!.!!
00 -- all
I/O
devices other than
magnetic tape
drives
01
to
magnetic tape
drives
FF
No.t,g!
Only the numbers of
the drives attached should
be used.
r-------------T ,
ISymbclic Addres~IDevice Type I
i-------------+--------------------I
ISYSRES Itape drive I
l----------------+ -I
ISYSRDR Icard reading device I
t I ~
ISYSIPT Icard reading device or I
I
Itape drive I
I I ~
ISYSOPT Icard punching device or I
I I
tape drive 1
J I ~
ISYSLST Iprinter I
J--------------+ -I
ISYSLCG Iprinter 1
1 --+----------------1
ISYSOOO 1 1
Ito Itape drives 1
I SY 5015 I 1
L _____________ ---L-
Figure 51. Summary of Symbolic I/O Device
Addresses
dd
--This operand is the device-type speci-
fication. The specifications used are
listed in Figure 52.
X'ss'
-~hIs operand is the characteristics
specification for magnetic tape drives.
It is required for (1) 7-track magnetic
tape drives and (2) 9-track magnetic
tape drives with compatibility feature.
The operand must be omitted when 9-
track magnetic tape drives without com-
patibility feature are to be assigned.
The characteristics specifications for
7-track tape drives are summarized in
Figure 53.
Appendix A. Job Control Statements 161

IBM System/360 20 Specifications

General

Brand	IBM
Model	System/360 20
Category	Storage
Language	English