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Useful HP-28 Links
06-22-2016, 03:55 PM (This post was last modified: 07-13-2016 01:38 AM by RPL Calcs.)
Post: #1
Useful HP-28 Links
Does anyone have any other interesting link?
Post it here, please.

http://www.hpcalc.org/
http://users.skynet.be/luc.pauwels/luc/HP28



COVER BATTERY REPAIR
http://www.mpshp.com/hp28s
http://www.hpmuseum.org/forum/thread-5673.html


EMULATORS
IA32 platform
Emu28 http://hp.giesselink.com/emu28.htm (Free)
Emu42 http://hp.giesselink.com/emu42.htm (Free) (It has 28S emulation)

ANDROID platform
go28s https://sites.google.com/site/olivier2smet2/home/go28s (paid)

IOS platform
RPN 28x Calc http://tredje.se/rpn28xcalc.html (paid)


HARDWARE
http://users.skynet.be/luc.pauwels/luc/HP28/hardware
http://www.thimet.de/CalcCollection/Calc...28COM.html
http://www.hpmuseum.org/cgi-sys/cgiwrap/...i?read=313
http://www.hpmuseum.org/cgi-sys/cgiwrap/...i?read=275
http://www.thimet.de/CalcCollection/Calc...rared.html
https://www.defcon.org/images/defcon-16/...dspeed.pdf
http://www.thimet.de/CalcCollection/Calc...ption.html


INFORMATION
http://www.hpmuseum.org/hp28c.htm
http://www.finseth.com/hpdata/hp28c.php
http://www.finseth.com/hpdata/hp28s.php
http://www.hp-collection.org/calculators.html
http://www.keesvandersanden.nl/calculators/hp28c.php


MISCELLANEOUS
http://www.nic.funet.fi/index/misc/hp28s
http://www.ganjatron.net/retrocomputing/hp-28s
https://www.youtube.com/watch?v=gQ3Z6hUmEQg
https://www.flickr.com/photos/keithmidso...6354800664
http://www.thimet.de/CalcCollection/Calc...ntents.htm
ftp://ftp.ccl.kuleuven.ac.be/pub/hp28


NEWS AND DOCS
http://www.dtic.mil/dtic/tr/fulltext/u2/a236618.pdf
http://www.hp41.net/forum/fileshp41net/hp28sref.pdf
http://www.hp41.net/forum/fileshp41net/hp28sown.pdf
http://www.keesvandersanden.nl/calculato...ournal.php
http://www.courbis.fr/Voyage-au-centre-d...8-c-s.html
http://www.hpl.hp.com/hpjournal/pdfs/Iss...987-08.pdf
http://www.thimet.de/CalcCollection/Calc...erence.pdf


NEWSGROUPS
http://www.hpmuseum.org/forum
https://groups.google.com/forum/#!forum/....handhelds
https://groups.google.com/forum/?hl=en#!...p.sys.hp48


PROGRAMS
http://www.nic.funet.fi/index/misc/hp28s
http://xahlee.info/prog/hp28s/hp28s.html
http://www.hutter1.net/calculators/hp28s.htm
http://www.mpshp.com/hp28s/ProgramHP28S.pdf
http://www.vaxman.de/my_machines/hp/28s/28s.html
https://math.berkeley.edu/~ribet/Math115/99/clint4.pdf
http://canadacalling.ca/celnav/hpephemeridesprogv2.pdf
http://www.thimet.de/CalcCollection/Calc...ities.html


ROM ENTRY POINTS
HP28C - 1CC ROM http://hp.giesselink.com/Emu28/ENTRY28C.ZIP
HP28S - 2BB ROM http://hp.giesselink.com/Emu42/suprom28.zip

Important to read http://users.skynet.be/luc.pauwels/luc/H...e/syseval/
Interesting to read http://www.nic.funet.fi/index/misc/hp28s/syseval.util


SELF-TEST
http://www.rskey.org/~mwsebastian/selfte...t.htm#hp28
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06-22-2016, 05:30 PM
Post: #2
RE: Useful HP-28 Links
If you visit http://www.hutter1.net/calculators/hp28s.htm you'll be greeted with an automatic download of a MIDI tune called hp28.mid.

It was a bit surprising, but the tune is very catchy, with a nice synthpop feel: fans of 80's will appreciate! ;-)
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07-02-2016, 02:43 AM (This post was last modified: 07-02-2016 02:49 AM by JDW.)
Post: #3
RE: Useful HP-28 Links
Why is emu42 not listed under EMULATORS? It has 28S emulation.

What is the difference between emu42 and go28s?

Note that your "new" ftp link is broken, or at least I get an error on my iPad:

http://ftp.ftp.ccl.kuleuven.ac.be/pub/hp28/

Do any of you use the 28S in emulation?

It seems there's no modern emulator for the Mac that runs under El Capitan, but it would be nice to see a Windows emulator support high resolution displays, such that I could use Wine on my 5k iMac to display the 28S (and other calcs) in actual size, photorealistic glory!

Lastly, the MIDI music mentioned by the previous poster doesn't play on the iPad.
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07-02-2016, 05:42 AM (This post was last modified: 07-02-2016 02:45 PM by RPL Calcs.)
Post: #4
RE: Useful HP-28 Links
Quote:Why is emu42 not listed under Emulators? It has 28S emulation.
Sorry. I did not know. This has been corrected.

Quote:What is the difference between emu42 and go28s?
I just know that
Emu42 - free - IA32 platform
go28s - paid - Android platform

Quote:Note que your "new" ftp link is broken, or at least I get an error on my iPad:
http://ftp.ftp.ccl.kuleuven.ac.be/pub/hp28/
It was working before. It must have been taken out of operation.

Quote:Do any of you use the 28S in emulation?
I never used emulation to 28S before, I'm trying now.
But I'm having trouble getting work. I'm trying Emu28 in 64-bit Win7. :-)

Thank you for your questions. Anothers questions will also be welcome.
Best regards.
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07-02-2016, 07:45 AM
Post: #5
RE: Useful HP-28 Links
(07-02-2016 05:42 AM)RPL Calcs Wrote:  
Quote:Note your "new" ftp link is broken, or at least I get an error on my iPad:
http://ftp.ftp.ccl.kuleuven.ac.be/pub/hp28/
It was working before. It must have been taken out of operation.

FTP links are not supposed to start with http://, therefore you need to check your original source.

(07-02-2016 05:42 AM)RPL Calcs Wrote:  I never used emulation to 28S before, I'm trying now.
But I'm having trouble getting work. I'm trying Emu28 in 64-bit Win7. :-)

Do you have the HP-28S ROM? Without that, it won't work.
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07-02-2016, 08:07 AM
Post: #6
RE: Useful HP-28 Links
(07-02-2016 05:42 AM)RPL Calcs Wrote:  
Quote:Note que your "new" ftp link is broken, or at least I get an error on my iPad:
http://ftp.ftp.ccl.kuleuven.ac.be/pub/hp28/
It was working before. It must have been taken out of operation.

Try here instead:
http://users.skynet.be/luc.pauwels/luc/HP28/
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07-02-2016, 02:39 PM
Post: #7
RE: Useful HP-28 Links
(07-02-2016 07:45 AM)JDW Wrote:  FTP links are not supposed to start with http://, therefore you need to check your original source.

This is a known problem with the Forum software. You can't create a true ftp link, it gets munged into a non-working http: link. In this case, you can just show what the ftp link should be, without inserting a true link, so folks can copy/paste. Most likely, the correct link works, but I have not checked.

--Bob Prosperi
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07-02-2016, 03:10 PM (This post was last modified: 07-02-2016 03:44 PM by RPL Calcs.)
Post: #8
RE: Useful HP-28 Links
Hello, Gentlemans.
Thank you for your replies.

In fact I did not use http//.
I pasted the address and the system put automatically the http// prefix.
This time, I used hyperlink quotes, so http// was not added.

I checked all links in 22-June-2016 (first post date), all links worked fine.

The original link is in the FTP Sites item, in
http://users.skynet.be/luc.pauwels/luc/HP28/
It also does not fuciona.

I believe the address ftp://ftp.ccl.kuleuven.ac.be/pub/hp28 is no longer active.


Quote:Do you have the HP-28S ROM? Without that, it won't work.
I'm trying to make a ROM dump (28s to 48gx).

Best Regards.
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07-12-2016, 04:20 AM
Post: #9
RE: Useful HP-28 Links
Hello, Gentlemans.
Two new links was added.

ROM ENTRY POINTS
1CC ROM http://www.hpcalc.org/details.php?id=5428
2BB ROM http://www.hpcalc.org/details.php?id=408

Best regards.
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07-12-2016, 04:33 AM
Post: #10
RE: Useful HP-28 Links
RPL Calcs,

I take it you were able to make a ROM dump of your 28S to your 48GX?
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07-12-2016, 03:50 PM
Post: #11
RE: Useful HP-28 Links
(07-12-2016 04:20 AM)RPL Calcs Wrote:  Hello, Gentlemans.
Two new links was added.

ROM ENTRY POINTS
1CC ROM http://www.hpcalc.org/details.php?id=5428
2BB ROM http://www.hpcalc.org/details.php?id=408

Best regards.

A more recent version from above:

1CC ROM http://hp.giesselink.com/Emu28/ENTRY28C.ZIP

Entry point list in the same style like the 1CC one:

2BB ROM http://hp.giesselink.com/Emu42/suprom28.zip
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07-13-2016, 12:18 AM
Post: #12
RE: Useful HP-28 Links
Cheers, Mr Giesselink.

Thank you for your contribuisions.
The links was added (updated) in the Post #1.

Best regards.
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07-13-2016, 01:38 AM
Post: #13
RE: Useful HP-28 Links
RPL Calcs & Christoph,

Regarding the HP-28S, I am comparing this...

2BB ROM http://www.hpcalc.org/details.php?id=408

to this...

2BB ROM http://hp.giesselink.com/Emu42/suprom28.zip

But the content isn't quite the same.

What is all this for again?
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07-13-2016, 08:41 PM
Post: #14
RE: Useful HP-28 Links
(07-13-2016 01:38 AM)JDW Wrote:  RPL Calcs & Christoph,

Regarding the HP-28S, I am comparing this...

2BB ROM http://www.hpcalc.org/details.php?id=408

to this...

2BB ROM http://hp.giesselink.com/Emu42/suprom28.zip

But the content isn't quite the same.

What is all this for again?

Just remember, the HP28 is a closed system with less public information and no public tools to write "System Objects". The offical way to call SysRPL-Objects is SYSEVAL from UserRPL. But the SYSEVAL numbers wasn't public at all, so some very enthusiastic people try to discover these secrects at end of the 80'ies. The list at http://www.hpcalc.org/details.php?id=408 is an example of such a work.

For the successor HP48SX soon after Joe Horn began his Horn Disk series. Around 1992 Joe published Horn Disk 4 which contain the HP-TOOLS, a collection of SysRPL-Compiler, Assembler, Linker, entry point list and documentation around SysRPL and Assembler programming especially for the HP48S(X).

The entry point list is a collection of the entry point names and the corresponding SYSEVAL address for use with the HP-TOOLS Assembler/Linker package. The delivered documentation tell for some entry point names the working and the input and output variable types.

There are no official entry point lists for the HP28C 1BB, 1CC or for the HP28S 2BB. Decades ago JFG began to write a 700 items large entry point list for the HP28S using the entry point names of the HP48SX. With the tools inside Emu42 I was able to increese the list to over 2500 items over the years.

So why we know that =SUB$ has address #041CF in the HP28 2BB ROM?

That's easy, we compared the ROM disassembly of the HP28S with the one from the HP48SX. If the dissassembly is equal we found the named entry point in the HP28 ROM. There're still many gaps in the HP28 ROM entry point lists, these are unnamed entry points or there's no source code equivalent in the HP48. Especially graphic output routines are affected by this.

So back to the entire question, with the entry point list at http://hp.giesselink.com/Emu42/suprom28.zip and the HP-TOOLS you can write SysRPL and assembly programs in the same style like writing such programs for the HP48. How you get such programs inside the HP28 is a different question.
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