HP 42S/DM42 Programs in the Style of HP 65/67 Cards
Programming Cards
In the 1970s, a programmable scientific calculators stored programs on magnetic cards. The magnetic cards were then loaded on to calculator. Two such calculators that used magnetic cards are the legendary HP 65 and HP 67, both from Hewlett Packard.
The aim of these programs is to simulate classic programs from the HP 65 and HP 67 as they are stored on the cards, with prompts and messages to enhance the user experience.
The HP 65 had five user-definable keys A-E, while the HP 67 adds five additional user-defined labels a-e through a shift-key combination.
The MENU command on the HP 42S* creates a user key menu within a program, up to six keys. I use this command to simulate running programs from loading cards.
(*and Free42, Plus42, Swiss Micros DM42)
The file included in the link below include four programs that are ported from various application books (pacs) of the HP 65 and HP 67.
Demonstration Program: demo.raw
When the program is run, a card is "simulated".
I usually have the card in this format:
Left keys: inputs, will sometimes give outputs
Key 4 (or 5): labeled CALC, get outputs
Key 6: EXIT. Exits the program. Simulates removing the card.
Demonstration
Key 1: enter X coordinate
Key 2: enter Y coordinate
Key 4: calculate the norm
Key 6: exit the program
Notes: before GTO 30, I have a pause command (PSE) so the menu returns.
If I have multiple outputs, I have a stop command (STOP).
Message convention:
Prompts with a colon: (:) input
Prompts with an equals sign: (=) output
# comments
00 { 134-Byte Prgm }
01▸LBL "DEMO"
02 "VECT NORM/ANG" # short description of the program
03 AVIEW
04 PSE # pauses the screen (allows for print)
05 "BY EWS"
06 AVIEW
07 PSE
08▸LBL 30 # label 30 starts the menu
09 "→X"
10 KEY 1 XEQ 21
11 "→Y"
12 KEY 2 XEQ 22
13 "CALC"
14 KEY 4 XEQ 24
15 "EXIT"
16 KEY 6 XEQ 26
17 MENU # menu setup
18▸LBL 00
19 STOP
20 GTO 00 # repeats the menu unless a menu key is pressed
21▸LBL 21 # enter X
22 STO 01
23 "X:"
24 ARCL ST X
25 AVIEW
26 PSE
27 GTO 30
28▸LBL 22 # enter Y
29 STO 02
30 "Y:"
31 ARCL ST X
32 AVIEW
33 PSE
34 GTO 30
35▸LBL 24 # calculate
36 RCL 02
37 RCL 01
38 →POL
39 "NORM="
40 ARCL ST X
41 AVIEW
42 STOP
43 "ANGLE="
44 ARCL ST Y
45 AVIEW
46 PSE
47 GTO 30
48▸LBL 26 # exit routine
49 CLMENU
50 EXITALL
51 .END.
Sample Output:
VECT NORM/ANG
BY EWS
X:5.7500
Y:6.8500
NORM=8.9434
ANGLE=49.9894
Program Space vs. Information Labels
When messages and alpha strings are added, along with the necessary AVIEW, PSE, and STOP commands, the program space requirements increase. I put these messages to make the program as user friendly as possible.
What's Included in the Zip Drive
Five programs:
Demonstration Program: demo.raw
Sight Reduction Table: str.raw
Physiologic Shunt and Fick: phsy.raw
1-D Normal Shocks for Ideal Gases: shock.raw
P and S Seismic Wave Velocity: seismic.raw
PDF file of instructions and program listing
Download here (zip file):
https://drive.google.com/file/d/1_0F_DHCGxcLbmCtrhMQbKShjrpBUgB7i/view?usp=share_link
Enjoy and please let me know, I plan to create another volume of these style of programs.
Note: The next blog entry will be on November 18, 2023
Eddie
All original content copyright, © 2011-2023. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.
