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SECTION 1
T
D
,
z
1:1
Y
I
Y-I-X
l
y-X
~~
Y
13
X
Y><X
ylx
X
1:1
Le
t
us look
at
Ihe conlent$ 01 the stack as w
e d
o (3
x 4
) -I-
(5
x
6).
The keys used are shCMfi above the circl
ed
steps
CD
through
®.
Oi reetly
above
the keys yo
u
see
Ihe
in
f
ormation '" the
X, Y, Z
and
T regis
t
ers after t
he k
ey
stroke.
(3 " 4)
-1-
(5
x
6)
T
Z
"
Y
3
3
"
5
X
3.
3.
,
".
5.
5.
KEY
I1l
D
0
13
lID
D
!>TE
P
<D @ @@ ® ®
STEP
CD
3
in di spl ay
IX
Regi
ste
r)
STEP
®
3
d uplicated
into
Y
Reg
ister
STE P
@
4
in
d ispl
ay
STEP
@)
Product ( 12)
f
ormed in Y,
then drops ,nto
X
.
"
5
"
6.
30.
".
@l
13 D
0®
@
STEP
®
A Ul
omatic
~
pushes 12 in
to Y, d
is-
d Isplay shows
5.
STEP
®
~
pushes
y
inl0 Z,
X
inlO Y,
and
leaves
x
unchanged,
STEP
CV
6," d isplay
STEP
®
Produci (30) formed in Y, then Z and
y
drop to Y and X
STEP
®
Sum
(4
21 formed in Y
t
hen
d
rops into
X.
7
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