HP HP-67 - Page 16

PROGRAM Mode
Automatic RUN Mode
Active keys:
[:] Clear pro-
gram. Clears program
memory to all
instructions, sets
calculator to step 000,
clears all flags, and
specifies FIX 2 and
DEGREE modes
(page 132).
(BST] Back step.
Moves calculator back
one step in program
memory (page 158).
E53 single step.
Moves calculator for-
ward one step of
program memory
(page 155).,
Pressed from
keyboard:
(Ciercy] After pre-
fix key, cancels that
key. After other keys,
does nothing. Does
not disturb program
memory or calculator
status (page 147).
(BST] Back step. Sets
calculator to and dis-
plays step number and
keycode of previous
program memory step
when pressed; displays
original contents
of X-register when
released. No instruc-
tions are executed
(page 158).
Single step.
Displays step number
and keycode of cur-
rent program memory
step when pressed;
executes instruction,
displays result, and
moves calculator to
next step when
released (page 152).
Executed as a
recorded program
instruction:
Stops pro-
gram execution and
transfers control to
keyboard for 1 second,
thenresumes program
execution (page 172).
(z0] (x=0] x>0} x<0]
Conditionals. Each
tests value in X-regis-
ter against O or value
in Y-register as indi-
cated. If true, calcula-
tor executes instruc-
tion in next step of
program memory. If
false, calculator skips
one step before re-
suming execution
(page 186).
(F?] If flag true. Fol-
lowed by flag desig-
nator (0, 1, 2, or 3),
tests designated flag.
If flag is set (true) the
calculator executes
the instruction in the
next step of pro-
gram memory. If flag
is cleared (false), cal-
culator skips one step
before resuming exe-
cution. [F?] clears
flags F2 and F3 after
test (page 255).
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