HP 9100B Operating & Programming Manual page 67

PROGRAMMING THE 91008
INTRODUCTION TO PROGRAMMING
This section describes the programm ing keys and explains how
to program the 91008 Calculator. The magnetic-core memory,
described briefly on Page 8 of this manual, is covered in
more detail to ass1st programmers in writing more eff1cient pro-
grams.
Programming the 91008 is s1mple as the keyboard operations
are the program instruct1ons and no special program ' language'
has to be learned. lt 1s, however, essential that the program -
mer knows exactly what each key (including those described in
the previous section) does, and that he is precise in g1ving in-
structions to the calculator. However, if an error is made in a
program , it is a simple matter to correct the program wh ile it
is in the machine.
Figure 2, below, is a three dimensional representation of one
page of the magnetic-core memory. The storage memory con -
sists of two pages , the ' (+ ) page ' and the ' (- ) page' .
~pr;:::= 0 ====
CHARACTERS
~
/ I
2 3
4 5 6 7 8 9
~
a
b
c
d
~~<::>
Lf--
~ L,_V-
L[2[:2~
2c
L~V-V--L..
--LV-~L~
LV-r--L_r-
~ ~~c_V-
C2V-V-~V-k:
Program
V-V-V-V-V-k"
or
Data Storage
[2V-V-V-V-~
V-~k:::k::k::k"
[2k:::k::V-k:::k"
f-~k::::-k:::-
k-"'k:::V-k:::k:::k":
~~-~~LL
c 2
V-V-V~-~
V-V-V-V-V-~
V-~V-k:::k:::k:::::
Data Storage
k:::
-~ -~
I I I I I
k:::: -V-
- V I/ / / / 1 / 1 / 1 / /L ... .-··""1./i/1 ....... -"' ' L /. /
~ -~
/1/ 1/1/1/ / l / , / 1 / /l/1./f./i./17
~
/ ...
...-...-L..-,..... 1 /
V l / 1 / i / i / 1 / 1 / . / r / 1 / ( /
~ ~
/ 1 / ! / , / 1 / , / 1 / t / i / ! / 1 / ' / t / . . / [ /
f - L t /!/Vl/1/!/t/t...-/1./:/1//1/t/
V t /1/1. /V / 1 . / /
'...-/t/t/i./""1/ 1 / f /
Figure 2. Programmable Memory
0
2
3
4
5
6
~
7
LIJ
1-
8
~
"
9
LIJ
0:
a
b
c
d
e
F
RE GI S
57
s