IBM System/360 20 User Manual

The TPS Report Program Generator (RPG)
translates source programs written in the
RPG language into executable object pro-
grams. If the RPG is to be used, it must
be contained in the program library of the
tape-resident system.
RPG source programs can be either com-
piled and executed in one job (comFile-and-
execute function) or compiled only. In the
first case, the object program may, in
addition to being executed immediately, be
punched into cards or written onto tape
before it is executed. In the latter case,
the object program must be either punched
into cards or written onto tape.
It is not possible to compile RPG pro-
grams with the read/compute, write/compute
overlap feature of the Model 20. Therefore
if the RPG source program is to be compiled
only or compiled and executed in one job,
this feature must not be specified in the
RPG control card.
RPG object programs contained in punched
cards can be:
1. executed under control of the card-
resident system, or
2. used as card input to the Core-Image
Maintenance (CMAINn program, i.e.,
they can be included in the program
library of the user's tape-resident
syste m, or
3. executed under control of the tape-
resident system by means of the
execute-loader function, with SYSIPT
assigned to a card reader.
RPG object programs stored on tape (in
card-image format) can be:
1. executed under control of the tape-
resident system by means of the
execute-loader function, or
2. used as tape input to the CMAINT pro-
gram; i.e., they can be included in the
program library of the tape-resident
system.
RPG object programs can also be included
in the set of input phases (in cards or on
tape) for the building of a tape-resident
system. Refer to the appropriate sections
of this publication for a description of
the opera ti ng procedures.
1/0 DEVICE ASSIGNMENTS
The following symbolic I/O device addresses
are used to prepare and perform an RPG com-
pilation under control of the tape-resident
system:
SYSRES -- Required. Assigned at IPL time.
Refers to the 9-track tape drive
on which the system tape is
mounted.
SYSEDR -- Required.
Refers to the card reading device
used for reading the jot control
statements.
SYSIPT -- Required.
Refers to the card reading device
used for reading
a) the RPG control card,
b} the RPG source program.
SYSLOG -- Optional.
Refers to the printer on which
job control statements are
listed.
SYStST -- Optional.
Refers to the printer on which an
RPG listing is produce~.
SYSOP! -- Optional if the compile-and-
execute function is used.
Required if a source program is
to be compiled only.
Refers to the card punching
device or tape drive on which the
object program is produced in
punched cards or in card-image
format, respectively.
SYSOOO -- Required.
Refers to the tape drive on which
a compilation work tape is
mounted.
SYS001 -- Optional.
Refers to the tape drive on which
a second compilation work tape is
mounted.
~g!§_l: SYSOPT may refer to a tape drive
only if two work tapes (on SYSOOO and SYS-
001) are used.
]g!§_~: SYSRDR and SYSIPT may be assigned
the same card reading device. SYSOP! and
SYSOOO may be assigned the same tape drive.
The tape on SYSOPT is not rewound after an
RPG compilation. Therefore, several object
programs can be written on one tape.
20 System/360 ~odel 20 TPS Operating Procedures

IBM System/360 20 Specifications

General

Brand	IBM
Model	System/360 20
Category	Storage
Language	English