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Programming
77
Merged Keycodes
To
conserve
program memory
when
using prefixed functions,
the keycodes for the prefix
and
the
function are
merged into
one
step
.
For
an example of
this press
the second
key
of
the program,
CZI
,
and
the display
will change
to
:
01
15 02
The
two-number
code
01 that has
appeared on
the left
side of the
display designates the
step
number
of
program
memory that is
being displayed. The two pairs
of
numbers
on the
right
side of
the display indicate that the
function
0
CD
has
been recorded
in
that step
(Ol)
of
program memory. Digits I
and 5
denote the
0
key. Digits 0
and 2
denote the0key.
The
operation
stored
then
,
is
0
0
which
is the
x
2
function
.
In
everycase,a single operation
(e.g.,
a
~
,
Em)
III CD ,ElD )
uses
only one step of
program
memory.
Each
operat
ion
,
prefixed
or
not, requires
only
one step of program memory.
The keys for finding the
area of a sphere and their corresponding
displays
are shown
below
.
Press
each key
in
turn
and
verify the
keycode shown
in the display.
Key
Display
O
CZl
I
01
15 02
0
0
1
02
15 73
0
I
03
61
In this
case, a
program consisting
of five
keystrokes
takes only
three steps of
program
memory.
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