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HP HP-67 - Page 112

HP HP-67
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108
Function
Keys
When
you
key
a
number
into
the
display
and
press
the
key,
each
of
the
following
operations
is
performed:
1.
The
number
that
you
keyed
into
the
X-register
is
added
to
the
contents
of
secondary
storage
register
Rgy;
(2x
—
Rgy).
2.
The
square
of
the
number
that
you
keyed
into
the
X-register
is
added
to
the
contents
of
secondary
storage
register
Rgs;
(2x*
=
Rg;).
3.
The
number
in
the
Y-register
of
the
stack
is
added
to
the
contents
of
secondary
storage
register
Rgg;
(Zy
—
Rgg).
4.
The
square
of
the
number
in
the
Y-register
of
the
stack
is
added
to
the
contents
of
secondary
storage
register
Rgz;
(Zy?
—
Rgy).
5.
The
number
that
you
keyed
into
the
X-register
is
multiplied
by
the
contents
of
the
Y-register,
and
the
product
added
to
the
contents
of
storage
register
Rgg;
(2Xy
—
Rgy).
6.
The
number
1
is
added
to
storage
register
Rgy,
and
the
total
number
in
Rgg
then
writes
over
the
number
in
the
displayed
X-register
of
the
stack.
The
stack
does
not
lift;
[,
X
1.
<TR,]
The
number
that
you
keyed
into
the
X-register
is
preserved
in
the
LAST
X
register,
while
the
number
in
the
stack
Y-register
remains
in
the
Y-register.
Thus,
when
you
press
[,
the
stack
contents
are
changed...
...from
this...
...to
this.
T
t
T
t
Zz
z
z
z
Y
vy
Y
¥y
X
X
X
n
LAST X
x_JLAsTX

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