The Museum of HP Calculators

HP Forum Archive 14

[ Return to Index | Top of Index ]

Community Interest: OpenRPN 49G+ Replacement ROM
Message #1 Posted by Hugh Evans on 29 Aug 2004, 12:31 a.m.

Hello,

I'm trying to get a sense of how much interest the community of HP users would have in the creation of an OpenRPN ROM for the 49G+ written to natively support the ARM CPU.

Over at OpenRPN we're working on a programming language called *fix (basically RPL with support of Post/In/Pre-fix entry methods. Since we're planning to do this in eC++ for ARM7 anyways, I thought using the 49G+ as a development platform might be prudent as ARM7 code is forward compatible with the ARM9.

This would allow for full support of programs written in RPL... and less processing power would be dedicated to emulating the saturn, which = more speed.

All I'm seeking is input from the community. Would you like a new ROM for the 49G+? If you are skilled at programming in eC++ would you be willing to code for our effort?

The ROM will be distributed freely under GPL as a gift to the community from the community.

Thanks for your time, please respond with a yes or no.

      
YES!
Message #2 Posted by Vieira, Luiz C. (Brazil) on 29 Aug 2004, 1:05 a.m.,
in response to message #1 by Hugh Evans

Hi Hugh, guys;

as many in here have already noticed, I'm always trying to support both new tech and ealier tech. My own interest in both, for sure. I just wish I could help with programming, but I have no skills for the proposed platform.

Cheers.

Luiz (Brazil)

      
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #3 Posted by . on 29 Aug 2004, 9:01 a.m.,
in response to message #1 by Hugh Evans

Yes I am very interested. Do you plan to have a CAS as well?

Just out of curiosity, how do you plan to do this? The hardware is completely undocumented. No-one knows much about it. How do you intend to send your new ROM into flash?

            
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #4 Posted by Hugh Evans on 30 Aug 2004, 2:47 a.m.,
in response to message #3 by .

This is a very rough draft idea of how to do it... But I would propose that we build a *fix (OpenRPN's RPL) kernel covering all of sysRPL and userRPL so we can drop the ROM on top of it.

The 49G+ is being actively hacked by the community, so I'm sure we can make this happen. GCC is coming along very nicely already!

Regards,

HDE

      
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #5 Posted by James M. Prange on 29 Aug 2004, 10:33 a.m.,
in response to message #1 by Hugh Evans

I think that if you ask on the newsgroup comp.sys.hp48, you'll probably get an enthusiastic response. How the Saturn emulator uses the ARM hardware is being actively explored already.

You might also consider it for "Project Qonos" when that results in a product. It's supposed to use an Xscale processor, which I understand is also an ARM processor.

Regards,
James

      
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #6 Posted by Ben Salinas on 29 Aug 2004, 4:35 p.m.,
in response to message #1 by Hugh Evans

Sounds like a great idea. I came across this site a few days ago (maybe from Slashdot, or comp.sys.hp48 or perhaps even from teh openRPN forums), but in case you haven't seen it: http://hpgcc.sourceforge.net/ Natively programming the ARM processor on the 49g+ using c++. Looks pretty cool.

-Ben Salinas 12345

            
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #7 Posted by Hugh Evans on 30 Aug 2004, 2:55 a.m.,
in response to message #6 by Ben Salinas

Indeed, very exciting stuff! HP-GCC helped to inspire this idea. I've got a thread up on comp.sys.hp48, so I'll keep everyone posted as to how this idea progresses.

Keep your fingers crossed!

Regards, HDE

      
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #8 Posted by J-F Garnier on 30 Aug 2004, 7:01 a.m.,
in response to message #1 by Hugh Evans

Very interesting idea!

I would suggest to make OpenRPN also available on standard PocketPC machines (see the thread "The Ipaq PocketPC - the last and ultimate HP calculator" above).

In this way, users could choose between dedicated machine (easy to use keyboard, high efficiency system), or standard PocketPC (high speed processor, but no real keyboard). I doubt that HP will never release a HP49G+ successor with 400MHz processor...

J-F

            
Re: Community Interest: OpenRPN 49G+ Replacement ROM
Message #9 Posted by . on 30 Aug 2004, 7:21 a.m.,
in response to message #8 by J-F Garnier

The HP49g+ can already be set to run at 203MHz, what needs more speed then that?


[ Return to Index | Top of Index ]

Go back to the main exhibit hall