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IBM System/360 20 - 170

IBM System/360 20
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Logi£al_Yni1_1ablg:
A
feature
of
the
(Basic)
Monitor.
It
has
logical
unit
blocks,
each
of
which
refers
to
one
specific
symbolic
I/O
address.
These
symbolic
addresses
are
related
to
physical
I/O
device
addresses
by
means
of
ASSGN
control
statements.
!:!,g.g.2-I!.i£g£!Q!:Y:
An
area
of
the
macro
library
section
of
a
system.
The
TPS
version
has
four
priority
sections,
each
of
which
contains
the
identifiers
for
the
macro
definitions
contained
in
the
corresponding
sec~ion
of
the
macro
library.
Is
used
with
programs
written
in
the
Assembler
language.
Macro
directory
can
be
listed
on
a
printer
by
means
of
the
Directory
Service
program.
Macro
ldentifier:
An
entry
in
the
macro
directory
that
identifies
and
points
to
the
corresponding
macro
definition
in
the
macro
library.
MaCI~In§!ru£!ion:
A
macro
instruction
is
a
statement
that
is
used
in
a
source
program
and
replaced
by a
specific
sequence
of
machine
instructions
in
the
associated
object
program.
!1~£1~0
L.i££g!:Y.-l1B~1:
An
area
of
the
macro
library
section
of
the
system
tape.
Has
four
priority
sections,
each
of
which
contains
the
macro
definitions
required
by
the
macro
instructions
in
user
programs.
~ac~o
Maintenance
Prog£E~:
A
system
Service
program.
Updates
the
macro
library
and
directory.
Is
used
to
add
and/or
delete
macro
definitions.
Macro~~±vi~~_Pr9.gram:
A
system
service
program
that
permits
the
printing
and/or
punching
of
one
or
more
macro
definitions
from
the
macro
library.
]]A~NT:
Macro
Maintenance
Program.
Mnemonic:
A
contraction
or
atbreviation
whose
characters
are
suggestive
of
the
full
expression.
MSERV:
Macro
Service
Program.
]Ylti=]~gl_1EE~!il~:
A
file
stored
on
more
than
one
tape
reel.
!1Ylti=1olYill~1~~
Filg:
See
Multi-Reel
Tape
File.
Q~£~nd:
The
representation
of
a
value
that
must
be
supplied
to
define
a
selective
function
to
the
program.
PhBse:
A
portion
of
a
program
executed
as
one
main-storage
load.
The
smallest
addressable
unit
in
the
core-image
library
of
a
tape
or
disk-resident
system.
May
be
output
of
Assembler,
RPG
or
Linkage
Editor
program.
E~§icE1-Rg£ord:
A
record
identified
from
the
standroint
of
the
manner
or
form
in
which
it
is
stored
and
retrieved;
that
is,
one
that
is
meaningful
with
respect
to
access.
(Contrasted
with
Logical
Record.)
Physicgl_1!nit
TE..Ql~:
A
feature
of
the
(Basic)
Monitor.
It
has
several
physical
unit
blocks,
each
of
which
contains
a
physical
device
address.
Pointers
to
these
entries
are
inserted
into
the
logical
unit
table
by
means
of
ASSGN
control
statements.
PriQ.£.i!Y-.1g.Y~l:
Classifies
macro
definitions
by
frequency
of
usage
in
TPS.
Four
levels
are
used
in
the
macro
library
section
of
the
tape
resident
system.
~±io~i1Y-~g£!.iQD:
An
area
of
the
TPS
macro
directory
or
library.
Each
priority
section
is
assigned
to
a
specific
priority
level.
]gggL~QIDE~!g~_~!:i!gLfQID£~te:
A
feature
of
the
IBM
System/360
~odel
20
Submodel
5
that
permits
data
transfer
to
or
from
I/O
units
to
be
overlapped
with
processing.
!eblQ£~:
To
change
the
format
of
a
file
so
that
a
different
number
of
logical
records
comprises
one
physical
record.
See
Block.
~ecor~:
A
general
term
for
any
unit
of
data
that
is
distinct
from
all
others
when
considered
in
a
particular
context.
~gEQ~!_~~Qg~Eill_§~ne.£atQ!:_J!lQl:
A
program
which
constructs
reports
or
report-writing
programs
in
accordance
with
input
specifications
of
the
data
file
and
of
the
desired
report.
!WC_FeEtu.£g:
See
Read/Compute,
Write/Compute.
Statement:
A
meaningful
expression
or
generalIzed
instruction
in
a
source
language.
~Y~EhE§g:
A
part
of
a
program
in
the
core-image
library.
~ust
be
provided
with
a
phase
name
that
is
identical
in
the
first
four
characters
with
the
name
of
the
main
phase.
~ll~olig.-1L.Q
Addrg§.§:
A
symbol
used
in
IBM-supplied
and
user-written
programs
to
refer
to
an
I/O
device
(e.g.,
SYSRES,
SYSIPT,
SYS005).
This
address
is
related
to
an
actual
address
by
means
of
the
logical
unit
table.
~1~1~1:
System
Input
Unit.
~YSQE1:
System
output
Unit.
170
System/360
Model
20
TPS
Operating
Procedures

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