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HP HP-67 - Page 140

HP HP-67
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136
Simple
Programming
You
can
tell
that
the
calculator
is
at
the
top
of
program
memory
because
the
digits[
000
]appear
at
the
left
of
the
display.
The
digits
appearing
at
the
left
of
the
display
with
the
W/PRGM-RUN
switch
wrram
[[[TIRUN
set
to
W/PRGM
indicate
the
program
mem-
ory
step
number
being
shown
at
any
time.
The
keys
that
you
must
press
to
key
in
the
program
for
the
area
of
a
circle
are:
Gun
0
0@
a
@
N
Press
the
first
key,
[/,
of
the
program.
Press
Display
You
can
see
that
the
display
of
program
memory
has
not
changed.
Now
press
the
second and
third
keys
of
the
program.
Press
Display
a
007
31
25
11
When
the
step
number
(001)
of
program
memory
appears
on
the
left
of
the
display,
it
indicates
that
a
complete
operation
has
been
loaded
into
that
step.
As
you
can
see
from
the
keycodes
present
on
the
right
side
of
the
display,
the
complete
operation
is
[#
(keycode
31),
(keycode
25),
£3
(keycode
11).
Nothing
is
loaded
into
program
memory
until
a
complete
operation
(whether
1,
2,
or
3
keystrokes)
has
been
specified.
Now
load
the
remainder
of
the
program
by
pressing
the
keys.
Observe
the
program
memory
step
numbers
and
keycodes.

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