How to alphabetically sort an alpha XM-file (HP-41)

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HP Forum Archive 15

How to alphabetically sort an alpha XM-file (HP-41)
Message #1 Posted by Geir Isene on 29 Jan 2006, 8:15 a.m.

What is the best, most efficient way of alphabetically sorting an ascii exended memory file on the HP-41?

Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #2 Posted by Raymond Del Tondo on 29 Jan 2006, 10:40 a.m.,
in response to message #1 by Geir Isene

Have you tried the SORTFL function of the CCD module?

Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #3 Posted by Geir Isene on 29 Jan 2006, 10:53 a.m.,
in response to message #2 by Raymond Del Tondo

Good tip. Don't have the CCD (waiting for it). I would however need a routine that doesn't use functions outside a standard HP-41CX (to make my upcomming PDA program usable for most people).

Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #4 Posted by Geir Isene on 30 Jan 2006, 1:54 a.m.,
in response to message #2 by Raymond Del Tondo

It seems the SORTFL function only sort data registers in XM.

Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #5 Posted by Ángel Martin on 30 Jan 2006, 7:11 a.m.,
in response to message #4 by Geir Isene

That's right, SORTFL can only deal w/ data files (or matrix files if you've changed its file type previously). ASCII files are trickier in that each record can have multiple "registers" (7-words each), thus the file type change trick won't work in this case.
No substitute to plain old RPN programming in this case, or so it looks.
Best,
ÁM


Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #6 Posted by Geir Isene on 30 Jan 2006, 7:36 a.m.,
in response to message #5 by Ángel Martin

Excuse my ignorance: Matrix files, what's that?

Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #7 Posted by Valentin Albillo on 30 Jan 2006, 8:20 a.m.,
in response to message #6 by Geir Isene

Geir Isene posted: "Excuse my ignorance: Matrix files, what's that? "

They're files created by the Advantage ROM, which can directly create and use matrices stored in extended memory. This way you use no numeric registers at all to store matrices, greatly simplifying most matricial programs.
In some cases your program can run even using no numeric registers at all (and no 'synthetic' registers M,N, etc., either), this is, even with SIZE 000. See my 62-line, SIZE 000 Nth-degree Polynomial Fit program featured in my Datafile article Long Live the Advantage ROM !
Best regards from V.

Re: How to alphabetically sort an alpha XM-file (HP-41)
Message #8 Posted by Geir Isene on 3 Feb 2006, 4:40 p.m.,
in response to message #1 by Geir Isene

Here we go (sorts only ascii files with records of max 24 characters - that's all I need for the "HP-41: The Reminder"-program):

001 *LBL "FLSORT" 002 LBL 01 003 0 004 SEEKPT 005 SF 25 006 GETREC 007 SF 05 008 FC? 25 009 GTO 03 010 SF 25 011 LBL 02 012 ASTO 05 013 GETREC 014 FC? 25 015 GTO 03 016 5 017 ENTER 018 ASTO X 019 X>NN? 020 GTO 02 021 CF 05 022 DELREC 023 RCLPT 024 1 025 - 026 SEEKPT 027 INSREC 028 1 029 + 030 SEEKPT 031 GTO 02 032 LBL 03 033 FC?C 05 034 GTO 01 035 CLA 036 CLST 037 SEEKPT 038 END

Edited: 4 Feb 2006, 3:02 a.m.

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