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The TPS Li nkage Edi tor program relocates
assembled programs and/or combines separ-
ately assembled program sections into an
integral program that can be executed under
control of the card-resident or tape-
resident system.
The required linkages and
relocations are performed on the basis of
the ESD and RLD information produced by the
Assembler program.
If the Linkage Editor
program is to be used, it must be contained
in the program library of the user's tape-
resident system ..
The input to the Linkage Editor program
can be contained in punched cards or stored
on tape in card-image format.
The output
from the Linkage Editor program can be
punched into cards or written onto tape in
card-image format.
I/O DEVICE ASSIGNMENTS
The following symbolic device addresses are
used in preparing and performing the execu-
tion of the Linkage Editor program:
SYSRES -- Required.
Assigned at IPL time.
Refers to the 9-track tape drive
on which the system tape is
mountE~d
•
SYSRDR -- Required.
Refers to the card reading device
on which job control statements
are read.
SYSIPT -- Required.
Refers to the card reading device
or
ta~e
drive on which the input
control section (s) is
(are) read.
SYSOPT -- Required.
Refers to the card punching
device or tape drive on which the
output phase(s} is (are) produced
SYSOOO -- Required.
Refers to the tape drive on which
work tape 1 is mounted.
SYS001 -- Required.
Refers to the tape drive on which
work tape 2 is mounted.
SYSLST -- Optional.
Refers to the printer on which
output information and messages
are listed.
SYSLOG -- Optional.
Refers to the printer on which
job control statements may be
listed.
!gte:
SYSRDR and SYSlPT may be assigned
the same card reading device.
JOB CONTROL STATEMENTS
The following job control statements are
used to set up the system for the execution
of the Linkage Editor program:
II JOB LNKEDT
II ASSGN
II iXEC
Required.
Required for any symbolic
address whose device
assignment in main storage
is to be changed.
Re~uired.
Any other job control statements need be
issued only if the corresponding functions
are to be requested.
Note:
The OPTN control statement must not
be-Included in the job control statements
for the TPS Linkage Editor program.
ADDITIONAL INPUT STATEMENTS
The Linkage Editor program uses the follow-
ing additional input statements:
PHASE
ACTION
ENTRY
Required.
Used to indicate
to the Linkage Editor pro-
gram that a new phase is to
begin.
One or more PHASE
statements may be present
in the input.
The first
input record must be a
PHASE statement.
Optional.
Used to indicate
to the Linkage Editor pro-
gram that any following XFR
and
ENt
cards are to be
duplicated (operand:
DUP)
or that the duplication of
XFR and END cards is to be
discontinued (operand:
NODUP) •
Required.
Must be the last
input record read on
SYSIPT.
The formats of the Linkage Editor input
statements are described in detail in the
SRL publication
IE~_§ystemL360 ~2de1-2QL
.1~~];ogramming ~.§te.IDL_~2ntrol_~nd~.§];=
~ice
P~ogram.§,
Form C24-9000.
The PHASE and ENTRY statements may be
produced by the Assembler program as a
result of Assembler REPRO instructions and
an AOPTN ENTRY statement, respectively.
If
they have not been produced, they must be
Fr~pared
manually and included in the input
read on SISIET.
30
System/360
Model 20 TPS Operating Procedures
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