1130 Scientific Subroutine Package Programmer's Manual

[Alistair Cooper]

Hi,

Thanks for letting me join the group.

Does anyone have a full listing for the subroutine SIMQ?

The 1130 Scientific Subroutine Package Programmer's Manual has a crease on the printout

which makes a few lines at the bottom unreadable.

Thanks.

[Carlos Abramo]

Alistair, 

I used to have a copy of an original manual, but dusing my last movement I lost track of it.

Should I find it, will scan it and put it available to the team.

Regards,

Carlos

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[Carlos Abramo]

Alistair,

Searching on GitHub, I found an SSP (https://github.com/Beliavsky/Scientific-Subroutine-Package) and extracted from it the attached version.

Hope this helps.

Regards,

Carlos

Note: It has more comments, includes usage and deck numbering differs, but code is the same.

[Alistair Cooper]

Thanks Carlos, but I think all the manuals are the same. The listing shown is an image from a creased printout.
I hope I'm wrong though.
Alistair

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[Alistair Cooper]

Courtesy of GLEN HERRMANNSFELDT

A link to the Version 3 of 1130 Scientific Subroutine Package Programmer's Manual PDF

https://bitsavers.org/pdf/ibm/ssp/GH20-0205-4-SSP-programmers_Aug70.pdf

Thanks Glen

[Alistair Cooper]

Thanks Carlos, That's Brilliant.

On Thursday, May 29, 2025 at 6:50:14 PM UTC+1 carlos...@gmail.com wrote:

[Paul Anagnostopoulos]

That link gets me to the S/360 Scientific Subroutine Package.

~~ Paul

[Carlos Abramo]

Correct, which is almost same as the one gor 1130. 

Actually, differences are somehow described in one on the 1130 SSP documents. 

Regardrs

Carlos 

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[Alistair Cooper]

Yes the RNDU Subroutine is different.

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[John Doty]

On May 31, 2025, at 12:20 PM, Alistair Cooper <agr...@gmail.com> wrote:

Yes the RNDU Subroutine is different. 

And the 16 bit version for the 1130 is even worse at making random numbers than the 32 bit version for the 360.

John Doty

j...@noqsi.com

[Peter Diehr]

Re: Random Number routines.

One of the professors at Eastern Michigan University ran a long series of statistical tests on various random number generation techniques; I did all of the programming for him. Probably 1970, and run on our IBM 1130 computer.  He was dissatisfied with all of his results, and contacted IBM for advice; they sent him a couple of copies of "IBM Data Processing Techniques", Form C20-8011, with the title "Random Number Generation and Testing", copyright 1959.

The paper summarizes a lot of research, but the end result was a recommendation for a very fast technique, which generates a very long sequence, which then repeats itself.  This is the power residue method, which can be implemented through just a few instructions, primarily a multiplication followed by a shift to eliminate the low-order bits. For the IBM 1130, I wrote an assembly language routine which was called IRAND, a function whose only input was a seed number which would control the entire sequence, and a return value, which consisted of the high order bits of the current multiplication.  This result was stored internally, and was fed into the next multiplication

This routine folds over (repeats) in k-space for multidimensional applications, but was very fast, and was shared with many other computing centers, so somebody may still have the source code.  We used it to replace all of the previous random number generators in our common libraries, based on the aforementioned professor's tests.

I still have a copy of the IBM manual; I just located it among my personal papers. The publication is twelve pages long.

Best regards, Peter Diehr

PS: My very last physics project was leading the design and construction of a Quantum Random Number Generator, based on a 400 nm wavelength laser, and the generation of entangled photon pairs. The randomness was based on the temporal intervals between our four single-photon detectors.  There were four because the entangled photon pairs were sorted by polarization state. I mention this only because I always seemed to be working with random numbers ever since early in my career!

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[Joseph Ambrose]

Have you looked at Bitsavers? 

Here's a link to the subroutines directory

https://bitsavers.org/pdf/ibm/1130/subroutines/

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[Alistair Cooper]

Yeah, that's where I got it from.

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