HP HP-67 - Page 143

Simple Programming 139
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Executing l
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If you try to press a letter key (¥ through @, {3 (3 through (2 (&)
that is not contained as a label instruction in program memory, the
HP-67 will execute no instruction and will display .
For example, if your HP-67 contains only the program for area of a
circle that you keyed in earlier, you can see this by simply pressing
another letter key.
First, ensure that the W/PRGM-RUN switch wierem [l RuN is set
to RUN.
Press Display
B
To
clear
the
error
from
the
display,
you
can
press
£%3,
or
any
key
on
the
keyboard,
or
you
can
slide
the
W/PRGM-RUN
switch
wereM
[[[IMruN
to
W/PRGM.
The
calculator
remains
set
at
the
current
step
of
program
memory.