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MERGE COMMAND
19. 1 --
Use
direct
concatenation
Or
ali
of
the
SOUTce
~iles.
For
example,
if
five
ASCII
record
files
are
merged,
the
destination file can be represented
by:
Destination
File
File 2
: File 3: File 4 :
File
5
start of file
end of file . . . . :
The same type of concatenation would take place
if
the
file
format
was
either user-defined or
binar~
record.
The
MERGE command can be used in this manner to create one
large
data
or source program file from smaller files.
or a library
file of relocatable obJect programs.
19.
1.
2
Merg ing memory-image fi les
If
all
of
the
files
specified
by
<name
i>
are
memory-image
format filesl
then the destination file <dname>
will be a memory-image file also;
howeveri
it
will
span
all
memory
locations
between the lowest and the highest address
spanned by the <name
i>
fi~es.
If the
files
to
be
merged
occupy overlapping areas in memory,
then
ih.
destination file
will contain the contents of the last file to be merged
that
occupies
those common locations.
The MERGE command produces
a file that is the memory image of riles
1-n
as if they
were
loaded
into
memory
in the sequence in which they appear on
the command line.
Regions of memory spanned by <dname>
that
are
not
"loaded"
into
by
the <name
i~
files will contain
bina-ry zeroes.
For example,
if three memory-image files as described in
the following table were merged
togethe~1
<name
'
.....
1 ...
Lowest
Highest
rile
add,..ess
address
--------
-------
-------
1
600
FFF
2
100
7FF
3
1200
13FF
then the resulting destination file can be represented by:
Page
19-03
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