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(SR-56) Programmieren mit dem Taschenrechner SR-56 - SlideRule - 09-13-2024 03:29 PM
For our German readers, Programmieren mit dem Taschenrechner SR-56, Erste Auflage 1978, J. Schärf, H. Schierer, W. Baron, © Oldenbourg, 163 pages
1. Grundlagen 9 - 48
1-10
2. Programmierung 49 - 83
11-16
3. Anwendung 84 - 161
{27 subsections}
BEST!
SlideRule
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Thomas Klemm - 09-14-2024 09:52 AM
Although I am not German, I would like to thank you very much for the document.
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - SlideRule - 09-14-2024 10:50 AM
Gerne
Best!
SlideRule
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Nihotte(lma) - 09-14-2024 07:58 PM
(09-13-2024 03:29 PM)SlideRule Wrote: For our German readers,
...
Programmieren mit dem Taschenrechner SR-56,
...
BEST!
SlideRule
Hello everyone !
Thanks, SlideRule!
Nostalgia sequence!
In my high school, around 1981-1983, introduction to computers was done with this calculator and other SR-52s!!
Keep yourself healthy!
Laurent
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - SlideRule - 09-14-2024 11:43 PM
More to come.
BEST!
SlideRule
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - joeres - 09-15-2024 10:01 AM
(09-13-2024 03:29 PM)SlideRule Wrote: For our German readers, Programmieren mit dem Taschenrechner SR-56, Erste Auflage 1978, J. Schärf, H. Schierer, W. Baron, © Oldenbourg, 163 pages
1. Grundlagen 9 - 48
1-10
2. Programmierung 49 - 83
11-16
3. Anwendung 84 - 161
{27 subsections}
BEST!
SlideRule
Hello SlideRule, thank you very much, I have been thinking about adding an SR-56 to my collection for a while. I think the decision has now been made ;-).
Best regards
Joerg
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Maximilian Hohmann - 09-15-2024 02:55 PM
Hello!
(09-15-2024 10:01 AM)joeres Wrote: …I have been thinking about adding an SR-56 to my collection for a while. I think the decision has now been made ;-).
With a little luck you can get the one that is currently being offered on german (ex eBay) classifieds (Kleinanzeigen). It seems to be working and the price is OK. But I am not the seller so I don’t know for sure.
I remember that it took me very long to find a working one for a decent price, much longer than th SR-52.
Regards
Max
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - joeres - 09-16-2024 05:11 AM
(09-15-2024 02:55 PM)Maximilian Hohmann Wrote: Hello!
...
With a little luck you can get the one that is currently being offered on german (ex eBay) classifieds (Kleinanzeigen). It seems to be working and the price is OK. But I am not the seller so I don’t know for sure.
...
Regards
Max
Many thanks for the tip.
The video “HHC 2016: In Praise of the SR-56 Calculator” by Gene Wright (https://www.youtube.com/watch?v=oDtWB5ebssw) is fine, great, thank you very much.
Best regards,
Joerg
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Maximilian Hohmann - 09-16-2024 09:01 AM
Hello!
(09-16-2024 05:11 AM)joeres Wrote: The video “HHC 2016: In Praise of the SR-56 Calculator” by Gene Wright (https://www.youtube.com/watch?v=oDtWB5ebssw) is fine...
Indeed! I never attended one of the conferences in the US (and most probably never will) but I always watch the videos. After seeing this one I had to have an SR-56 :-)
Regards
Max
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Roberto Volpi - 09-16-2024 09:49 AM
A nice reading, just not to forget how non hp programmable calculators were.
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Thomas Klemm - 09-16-2024 07:15 PM
Cubic equation \(x^3 + ax^2 + bx + c = 0\)
A real root is calculated using Newton's approximation method.
Then the roots \(x_2\) and \(x_3\) are calculated from the quadratic equation \(x^2 + px + x = 0\) with \(p = a + x_1\) and \(q = x_1^2 + a x_1 + b\).
This is a translation of the program on page 108 for the HP-25:
Code:
01: 24 00 : RCL 0 ; x_i
02: 14 74 : f PAUSE ; >>> x_i <<<
03: 24 01 : RCL 1 ; a
04: 51 : + ; a+x_i
05: 23 04 : STO 4 ; R4 = a+x_i
06: 24 00 : RCL 0 ; x_i
07: 61 : * ; x_i*(a+x_i)
08: 23 07 : STO 7 ; R7 = x_i*(a+x_i)
09: 24 02 : RCL 2 ; b
10: 51 : + ; x_i*(a+x_i)+b
11: 23 05 : STO 5 ; R5 = x_i*(a+x_i)+b
12: 24 00 : RCL 0 ; x_i
13: 61 : * ; x_i*(x_i*(a+x_i)+b)
14: 24 03 : RCL 3 ; c
15: 51 : + ; x_i*(x_i*(a+x_i)+b)+c = f(x_i)
16: 24 07 : RCL 7 ; x_i*(a+x_i)
17: 24 00 : RCL 0 ; x_i
18: 15 02 : g x^2 ; x_i^2
19: 51 : + ; 2x_i^2+ax_i
20: 24 05 : RCL 5 ; x_i*(a+x_i)+b
21: 51 : + ; 3x_i^2+2ax_i+b = f'(x_i)
22: 71 : / ; Δx = f(x_i)/f'(x_i)
23: 23 41 00 : STO - 0 ; x_{i+1} = x_i - Δx
24: 15 03 : g ABS ; |Δx|
25: 24 06 : RCL 6 ; ε
26: 14 41 : f x<y ; ε < |Δx|
27: 13 01 : GTO 01 ; not enough
28: 24 00 : RCL 0 ; x_1
29: 74 : R/S ; === x_1 ===
30: 24 04 : RCL 4 ; p = a+x_1
31: 02 : 2 ; 2 p
32: 71 : / ; p/2
33: 32 : CHS ; -p/2
34: 31 : ENTER ; -p/2 -p/2
35: 31 : ENTER ; -p/2 -p/2 -p/2
36: 15 02 : g x^2 ; p^2/4 -p/2 -p/2
37: 24 05 : RCL 5 ; q = x_i*(a+x_i)+b p^2/4 -p/2 -p/2
38: 41 : - ; D = p^2/4 - q -p/2 -p/2 -p/2
39: 15 51 : g x>=0 ; D >= 0
40: 13 45 : GTO 45 ; 2 real roots
41: 32 : CHS ; -D -p/2 -p/2 -p/2
42: 14 02 : f SQRT ; Im z_{2,3} = √-D
43: 21 : x<->y ; Re z_{2,3} = -p/2
44: 13 00 : GTO 00 ; === z_{2,3} ===
45: 14 02 : f SQRT ; √D -p/2 -p/2 -p/2
46: 41 : - ; x_3 = -p/2 - √D -p/2
47: 21 : x<->y ; -p/2 x_3
48: 14 73 : f LASTx ; √D -p/2 x_3
49: 51 : + ; x_2 = -p/2 + √D x_3Examples
Set degree of accuracy:
EEX -6 STO 6
\(x^3 -19x^2 + 81x + 101 = 0\)
\(x_0 = 1\)
1 STO 0
-19 STO 1
81 STO 2
101 STO 3
f CLEAR PRGM
R/S
-1.000000000
R/S
10.00000000
x<->y
1.000000000
\(
\begin{align}
x_1 &= -1 \\
x_2 &= 10 + i \\
x_3 &= 10 - i \\
\end{align}
\)
\(x^3 -13x^2 + 20x + 100 = 0\)
\(x_0 = 2\)
2 STO 0
-13 STO 1
20 STO 2
100 STO 3
f CLEAR PRGM
R/S
5.000000000
R/S
10.00000000
x<->y
-1.999999999
\(
\begin{align}
x_1 &= 5 \\
x_2 &= 10 \\
x_3 &= -2 \\
\end{align}
\)
It is interesting that we can squeeze the 86 unmerged steps of the SR-56 into the 49 maximum steps of the HP-25.
It seems to me that the quality of these programs is better than that of the Applications Library.
For examples, compare "Greatest Common Divisor/Least Common Multiple" with "Größter gemeinsamer Teiler und kleinstes gemeinsames Vielfaches".
Or then "First Order Differential Equations" with "Runge-Kutta-Verfahren für Differentialgleichungen 1. Ordnung": the latter uses 4th order while the former uses only 3rd order.
RE: (SR-56) Programmieren mit dem Taschenrechner SR-56 - Sadsilence - 09-17-2024 01:40 PM
Vielen Dank!
(09-13-2024 03:29 PM)SlideRule Wrote: For our German readers, Programmieren mit dem Taschenrechner SR-56, Erste Auflage 1978, J. Schärf, H. Schierer, W. Baron, © Oldenbourg, 163 pages
1. Grundlagen 9 - 48
1-10
2. Programmierung 49 - 83
11-16
3. Anwendung 84 - 161
{27 subsections}
BEST!
SlideRule