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16
REAR
RA NG
IN
G
TH
E STACK
The
m
(RO LL OOWNI key let$ you reI/lew the Slack
contents Withou
t
losing data.
II
IS
also used to reposi
ti
on
data Wi thin the
s
lack. Here is what happens each lime you
press
m
t
~/T
Z
-.......j"'--
Z
Y
--'('--
y
x
./ '---
X
Exa
mpl
e: Load the sta
ck
by pressing
GJ
EiD
(gJ
amn
(ID
EiD
m·
(The
Slock
now
contains
X=4
,
1'''3,
Z-
2,
and
t
~
l
L
To
rel/iew
the COntents
of the stack
press
m
four
times.
The fourth
m
returns the
stack
to
its anginal
position
(X"'4,
y~3,
Z-2
and
t
-
l
l.
NOTE: Pressing
m
afte
r
e
ntering a series of digits
to form a number terminates the com
position
ur
tt",
num ber (i.
e.
,
no at$dltlonul dig its
can
be
appendedl
NOTE: The
stack is
raised
an
d
t
is loU when
a
ke
y
boa
rd
entry
or
a
follows
m
.
You
will often
f.nd that
X
and
y
should
be
exchanged
before
a
a
,
G
or
III
opera tion
.
The
f:Bl
key
exchanges.
X
and
y
as
shown beiON.
T
z
-
--
z
y~.----y
X---------'---
X
Exampl
e: Find {/S
12
Press
s
..
5
1
2
512
Commer"lt
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