HP HP-67

Program Editing 157
Going to a Step Number
It is easy to see that if you wanted to single-step from step 000 to
some remote step number in program memory, it would take a great
deal of time and a number of presses of the key. So the HP-67
gives you another nonrecordable operation, (2 (0 () (), that
permits you to go to any step number of program memory.
Whether the Program Mode switch is set to W/PRGM or to RUN,
when you press (3 (M () (n], the calculator immediately jumps
to the program memory step number specified by the three-digit
number (0] () (n). No instructions are executed. In RUN mode, you
can momentarily slide the Program Mode switch to W/PRGM to view
this program information, while if the calculator is already in
W/PRGM mode, the step number and keycode for the instruction con-
tained in that step are displayed. Program searching or execution then
will begin with that step of program memory. Loading will begin with
the next step of program memory.
For example, to add a £} instruction to review the stack contents
after the hypotenuse has been calculated by the instruction in step 007,
you can first press (go to) followed by a decimal point and the
appropriate three-digit step number of program memory. Then press
o to place that instruction in the following step of program
memory. Remember that when you add an instruction in this manner,
each subsequent instruction is moved down one step in program
memory, and the last instruction is lost from step 224. To add a
o instruction after the £ instruction, keycode 31 54, that is
now loaded into step 007:
Press Display
) 007 007 31 54
a 008 32 84
As you load the E] instruction into step 008, the instruction
Fhat was formerly in step 008 is moved to step 009, and the instructions
in subsequent steps are similarly moved down one step. The
Instruction
in
step
224
is
lost
from
program
memory.