IBM System/360 20 User Manual

The DATE control statement has the fol-
lowing format:
I I
I
IName IOp.Code
I Operands
I I I
III IDATE
Iyyddd
L ___ --L ________ -i
.lyggg
'----,
I
----1
I
,
This operand is the date specification,
wher~ yy represents the rightmost two
digits of the year, and ddd represents
the three-digit number of the day in
the year (ddd may be any of the numbers
001 through 366).
For example, the date September 1,
1966, would be specified as 66244. The
Job Control program converts this date
specification and places it in the date
field of the communication region in
the form 090166244.
Note: The DATE control statement need be
submitted only once after the Basic: Monitor
program has been loaded. Prior to the
execution of a program, the Job Control
program checks whether the communication
region contains the date.
The EXEC control statement indicates to the
Job Control program that the reading of a
set of job control statements has been com-
pleted and that control is to be returned
to the loading routine (in the Basic Mon-
itor program if no operand is specified, in
the tape Job Control program if the operand
LOADER is specified) •
The EXEC control statement has one of
the following formats:
r-----~I--------~--------
-,
IName IOp.Code IOperands
I
.-----+1 +------
------f
III IEXEC I
Ir----~Ir-----___+-----------
III I EXEC J[ RWC], [LOADER J
I
-1
I
L ___ ..L
J
The first type of EXEC statement does
not contain an operand. This type is used
to delimit any set of job control
statements issued to the card or the tape
Job Control program. The statement II EXEC
causes the Job Control program to return
control to the Basic Monitor program. The
load address of the next program phase must
not be below main-storage position 067E
(hexadecimal) •
The second type of EXEC statement
contains one or both of the symtols LOADER
and RWC in the operand field.
The statement II EXEC LOADER causes the
Job Control program to transfer control to
a loader routine, which is located at the
end of the Easic Monitor area in main
storage. The function of this loader
routine is to load a program from the
magnetic tape drive (the program must be in
card-image format), or from the card
device, assigned to SYSIPT. Any FETCH
macro instruction contained in the object
program thus loaded causes the loading of
the physically next program phase from
SYSIPT. When an EOJ macro instruction is
encountered in the program, control is
returned to the Basic Monitor program. The
symbol LOADER may only appear in the
operand field when the tape Job. Control
program is used. The load address of the
next prograID phase must not be below
main-storage position 07DO (hexadecimal) if
the device assigned to SYSIPT is a tape
drive. If this device is not a tape drive,
the first available main-storage position
is 64 (hexadecimal) bytes higher. If II
JOB RPG, name is specified the operand
LOADER will be ignored.
The statement II EXEC RWC causes the Job
Centrel program to change the mode of the
Basic Monitor from non-overlap to overlap.
This statement can be issued for both card
and tape Job Control programs. The load
address of the next program phase must not
be below main-storage position 0834
(hexadecimal) •
When the EXEC statement contains both
the symbols LCADER and RWC (in either
order) in the operand field, the Job
Control program changes the mode of the
Basic Monitor from non-overlap to overlap,
and transfers control to the loader routine
discussed above. The load address of the
next program phase should not be below
main-storage position 0960 (hexadecimal) if
the device assigned to SYSIPT is a tape
drive. If this device is not a tape drive,
the first available main-storage position
is 64 (hexadecimal) bytes higher.
NQ!~: Each set of job control statements
must be delimited by an EXEC control
statement.
The FILES control statement is used to
position a reel of magnetic tape, either by
skipping a specified number of tape marks
or by rewinding the tape to the load point.
The FILES control statement has one oE
the following formats:
r----, I
---,
IName lOp. Code JOperand
.----+---------+
1// IFILES ISYSxxx,n
I I I
J/I )FILES )SYSxxx,REW
L _____ ..L--- ______ ..L-
I
f
I
-1
I
--l
Appendix A. Job Control statements 163

IBM System/360 20 Specifications

General

Brand	IBM
Model	System/360 20
Category	Storage
Language	English