:-
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PATCH
Chapter 6 / Command Reference
External
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PATCH
pathname,address,datal,data2
Lets
you
make minor corrections
in
any disk file, provided that:
•
You
know the location of the bytes you want to change.
•
You
want to replace one
list
of hexadecimal values
with
another
list
of the same length.
Parameters
pathname is the file you want to change.
address is
the
starting
address of the
data
to be changed (in
hexadecimal).
datal is the
list
of the hexadecimal values to be changed.
data2 is a
list
of
the
hexadecimal
data
values to replace datal.
Notes
and
Suggestions
•
In
addition to using
PATCH
to change your own programs,
you can use
it
to implement minor program changes from
Tandy.
If
a Tandy program ever requires such a change,
Tandy will distribute a document
that
specifies
the
param-
eters you need
for
the
patch.
•
If
datal is not
at
address,
PATCH
generates
an
error mes-
sage
and
quits.
Example
patch
b:filex.exe,1A23,4462A3,436~B2
IENTERJ
patches
the
file FILEX.EXE, located on Drive B. The command
changes bytes
lA23
through
lA25
to
the
hexadecimal values 43,
60,
and
B2 (assuming
that
they
are
originally 44, 62, and A3).
137
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