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Commodore PC 20 - Debug

Commodore PC 20
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[-
10 Debug
r--
In this
chapter
you'll learn:
[~
[~
•
How
to
start
the
debug
utility
•
How
to
use
the
debug
commands
and parameters
Introduction
The
debug
utility is a debugging program that provides a con-
trolled
testing environment for binary
and
executable
object
files.
Note
that
edlin,
the MS·DOS line editor, is used
to
alter
source
files;
debug
is
edlin's
counterpart
for binary files.
Debug
eliminates
the
need
to
reassemble a
program
to
see
if
a
problem
has
been
fixed by a minor change. It allows you
to
alter
the
contents
of
a file
or
the
contents
of
a CPU register, and
then
immediately
reexecute
a
program
to
check
the
validity
of
the
changes made.
All
debug
commands may
be
aborted
at any time
by
pressing
CONTROL·C.
The
CONTROL-S key
sequence
suspends
the
display,
so
that
you
can
read it before
the
output
scrolls away. Pressing any
key
other
than CONTROL-C
or
CONTROL·S restarts
the
display.
All
these
commands
are consistent
with
the
control
character
func-
tions available at
the
MS· DOS
command
level.

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