Apple IIe - Commanding the Monitor and Memory Operations

The System
Monitor
251
Commanding
the
Monitor
The
important
thing
to
remember
when
using
the
monitor
is
that
it
is
very
picky
.
In
other
words,
monitor
commands
must
be
entered
with
the
correct
syntax.
In
this
section,
the
monitor
commands
will
first
be
presented
in
detail.
There
will also
be
a
short
lookup
section
at
the
end
of
the
chapter.
The
monitor
accepts
command
lines
up
to
255
characters
in
length.
All
command
lines
must
end
with a
[return]
.
Commands
contain
three
types
of
information:
command characters, add-
ress
values
and
data
values.
Command
characters
are
single
alphabetic
characters,
control
characters
and
punctuation
marks
,
usually
preceded
by
an
address
value.
Addresses
and
data
values
are
expressed
in
hexadecimal
nota-
tion.
Addresses
can
consist
of
as
many
as
four
digits;
data
can
consist
of
up
to
two.
If
an
address
or
data
value
is
entered
wi
th
fewer
than
the
maximum
number
of
digits
respectively
,
the
monitor
automatically
adds
leading
zeros.
If
a
value
greater
than
the
maximum
is
typed
in,
the
monitor
only
recognizes
the
rightmost
field
of
. digits. For
example,
if
78FE4
is
entered
as
an
address
only
8FE4
will
be
recognized
. Likewise
if
788FE
is
entered
as a
data
value,
then
only
FE
will
be
recognized.
Quite
a
few
examples
are
contained
in
this
chapter.
To
make
for
easier
reading
,
the
computer's
responses
will
be
displayed
in
bold.
Because
of
the
random
nature
of
the
computer's
memory
after
power-up
,
some
of
the
data
values
which
the
computer
displays may
differ
from
these
values
in
our
examples.
Memory Examine
To
examine
the
contents
of
any
memory
location
,
just
type
the
hexadecimal
address
of
the
location,
followed
by
return.
*E300
E300-88
*FF
OOFF-ED