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HP42s ROM



#20

Hi all!

I need to create (if possible) a ROM image from my HP42S, in way to enjoy it with a windows emulator.
I don't remember now where I read that it is possible without any hardware opening, just having another IR port suited calculator (HP50g?), trough the IR port, but actually it was not so clear for me that procedure.
I f somebody could help me I'll appreciate.
Thanks

Aurelio

PS: I'm not sure but I think that even if a copyrighted thing, for the owner of the hardware to get a copy of the ROM (obvoiusly only for his own pourposes)should be legal, isn't it?


Edited: 25 June 2012, 7:38 a.m.


#21

Quote:
If somebody could help me I'll appreciate.

I could imagine that the following site may be interesting for you: ;-)

http://quadrophenia6.free.fr/HP/Emulateurs/Emu42/

Franz


#22

Very interesting, Franz, thank-you a lot!
It saves me, maybe, from a big headache...

Grazie!

Aurelio

Edited: 25 June 2012, 9:52 a.m.

#23

Franz,

You are certainly one of the most knowledgeable people regarding where to find emulators and how to you them. You don;t miss a tiny detail!!! Many thanks for your vigilant effort.

Do you live in Vienna?

Namir

Edited: 25 June 2012, 11:14 a.m.


#24

Hi Namir!

Yes, I'm indeed a big fan of all kind of emulators, and I'm collecting them like others do with real calculators. But my hobby is definitely much cheaper than buying real machines, and so my collection very big and quite complete. :-)

No, I don't live in Vienna, I'm from Gmunden, a small city between Salzburg and Linz - I don't know if these cities are known in USA.

Franz


#25

Hi Franz these cities are quite wellknow, I think worldwide, expecially Salzburg, where W.A.Mozart was born ...
I have the poleasure to have been t least a few time in Austria when I lived and worked in a northern region of our italian country, years ago, bordering with your Kärnten.
The town where I lived for a while is Udine, have you been there?

Cheers
Aurelio


#26

Quote:
The town where I lived for a while is Udine, have you been there?

Well, I've not really visited it, just been near of it when driving to the Adria on holidays, but that's almost 40 years ago when I was still a child.

But since we live in neighbour contries it's clear that we know each others bigger cities. ;-)

And with Salzburg you're certainly right, even Chinese know it and love our classic music ... :-)

Franz

#27

I have visited Salzburg in 2006 (The 200th year of Mozart). My wife wanted to see where they filmed The Sound of Music in the mid 60s. The area is beautiful!!

Like yourself, I also collect emulators. I write a very few myself.

Namir


#28

Quote:
Like yourself, I also collect emulators. I write a very few myself.

Yep, I also have one of your emulators - I just don't remember which one. I guess it's a HP-67, but I'm not sure because I don't know your homepage link anymore.

Franz

#29

Hi Franz,

this is interesting. I dumped the rom of my HP42S years ago using an HP48G as an IR receiver. Now I would like to compare my ROM image with the one you posted the link to. But I can't remember how to convert the packed format (the one in the link) to the unpacked one (which I have). I am sure there was a tool to do that, but can't remember. Would you happen to know how to do this?

Cheers,
Harald


#30

Well Harald, although I've never had such an 'dumped' ROM (because I don't have a real 42s), but I guess this could be done with CAPC2BIN.EXE, which you can find on Christoph's site in this file:

http://hp.giesselink.com/Emu28/CPROMUPL.ZIP

I hope it will do what you want ...

Franz


#31

Quote:
Well Harald, although I've never had such an 'dumped' ROM (because I don't have a real 42s), but I guess this could be done with CAPC2BIN.EXE, which you can find on Christoph's site in this file:

http://hp.giesselink.com/Emu28/CPROMUPL.ZIP

Right page, but wrong tool. ;-)

Use "Emu2rom.exe" for converting from the unpacked to the packed and "Rom2Emu.exe" for converting from the packed to the unpacked format please. Both files can be found in the http://hp.giesselink.com/Pcuti/FILETOOL.ZIP package.

Christoph

Edited: 25 June 2012, 1:19 p.m.


#32

Quote:
Right page, but wrong tool. ;-)

Ahhh, it seems I've confused the conversion direction!?

But with the tool that I have posted he could do it in the opposite direction, converting his file to the ROM format, right?

At least this is what the description says:

- CAPC2BIN.ZIP
Conversation tool to convert captured into binary ROM data.

Franz

Edited: 25 June 2012, 1:21 p.m.


#33

Quote:

Ahhh, it seems I've confused the conversion direction!?

But with the tool that I have posted he could do it in the opposite direction, converting his file to the ROM format, right?

At least this is what the description says:

[pre}
- CAPC2BIN.ZIP
Conversation tool to convert captured into binary ROM data.
[/pre]

Franz


Hi Franz,

just edited my posting above, the answer was how to convert a packed to an unpacked one. I suggested the opposite tool.

To the program cap2bin.exe. The captured data isn't the pure raw data of the ROM image, it also contain block no. and checksums very similar to the XModem protocol. So the program cap2bin.exe strip off the HP48 binary header and the HP48 string object wrapper and finally decode and check the downloaded data from the file. On invalid block no. or wrong checksum, the program stops converting with an error.

Christoph


#34

Thanks for the explanation, Christoph!

There are so many useful (and similar) tools on your site that it's not easy to know what each of them is doing in fact. ;-)

Franz

#35

Cheers guys,

it must have been about 10 years ago when I did the rom dump, so all I can remember is being sat at the desk with my 42s and 48g for quite a while - but not the tools I used.

However, thanks to your great emulator Christoph, it was worth the effort, as I regularly use the emulator :)

Harald


#36

For nostalgic feelings, I think you done the ROM dump with JFG's description in HP-42S: New Facts at the HP Articles forum. Somebody told me, that it took him about 2 or 3 hours to made a ROM dump by this way.

And you're right, the article was published 10 year ago!

I had a look at my Emu42 archive. My first Emu42 alpha version v0.01a has the file date March 1st, 2002 and Emu42 v1.00 has been published on August 26th, 2004 to the public.

Christoph


#37

Yes, that is how I did it :)
How much time I used to have when I was a student.... ;)

#38

I used your description to dump the ROM image of my HP-42S and I still think that was the coolest program I've ever used on that calculator.

Thanks a lot for both: this program and your emulators.

Thomas


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