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CHAIN COMMAND
6.3 -- Compilation
Ope~ators
In
this
ease,
the
tag
Fl governs whether or not the Tile
TESTPROG UJill be assembled.
If Fl
is
specified,
then
the
assembly
blill
be
performed.
Then,
if
in addition F2 is
speci-ried
on
the
CHAIN
command
line,
the
obJect
rile
conversion will also take place.
The CHAIN rile can be used,
therefore,
to perform only the assembly,
or the assembly
and
the
obJect
rile
conversion,
but
not
the
obJect
file
conversion
by
itself.
If,
through the use
or
the conditional operators, a null
(empty)
intermediate
file
is genel'ated;
then the Execution
Phase of the
CHAIN command
will be skipped.
Control
will
be
given
to
the
MDOS
command interpreter1 as ir no CHAIN had
ever been executed.
The
ABORT
operator provides a way of instantly retu'T"ning
to
MDOS during a CHAIN Tile's compilation.
No messages will
be
displa~ed
as a
~esult
or
encounte~ing
the ABORT
ope~ator.
It is the user's responsibility to include an explanation for
the ABORT through the use
o~
Compilation Comments.
The ABORT operator is typiaally employed in
terminating
/~
\
.~
a
CHAIN
compilation
if
one or more critical tags have been
~
omitted from
the
CHAIN
command
line.
For
example,
the
J
Tollowing
CHAIN
Tile will be aborted during the compilation
phase ir both
or
the tags OPT
and
FILE
are
missing.
The
Compilation
Comments
will
indicate
the
reason
ro~
the
tel'mination:
IIFS
OPT. FILE
1*
GOING
TO
ASSEMBLE ,-FILE7-
RASM %FILE7.;7.0PT%
IELSE
1*
BOTH
IIFILE" AND "OPT" MUST BE SPECIFIED
1*
CHAIN TERMINATED
IABORT
IXIF
6.4 Execution
Operators
Execution
Oper-ator-s
can
be
used
for
the
dynamic
adjustment
o~
a
CHAIN
process while
it
is being executed.
Through the use of these operators,
the user
can
set
values
in
an
e~ror
status word maintained by MDOS,
test the word,
and,
depending upon the results of the testJ
skip
a
pOTtion
of
the
procedure.
The error status word is accessed
by
all
MDOS commands to indicate whether or not they completed their
function without error.
~
..
..../
All
CHAIN
Execution
Operators
are
denoted
b~
the
Page
06-08
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