>Date: 16/02/2010 17:56
>Subj: Re: [openpsion] Does Symbian Open Source mean Psion/EPOC open
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>On 16/02/10 15:30, edward.robbins@... wrote:
>I actually know someone who works at Nokia, neé Symbian, née PSION,
>I asked them about this; after saying "The Psion 5? That's ancient!
>Also, crap" she added that everyone who knows about it is now gone.
>source code hasn't been released with the Symbian Foundation stuff,
>is still available to people inside Nokia.
>Of course, this is all entirely unofficial, probably not even right,
>beer was involved, etc.
>Am I right in assuming that people already *have* the necessary
>documentation, but it's restricted in circulation due to the NDA? Is
>worth me asking whether there's anyone still around with authority to
>revoke the NDA? Is anything else required?
Well, it depends on which Psion you're talking about really.
We have basically all the 5mx info in the form of 2.4 kernel sources,
which are complete although they may need tweaking... e.g. the
digitizer can act a bit strange with the back light on, though I'm not
actually sure if this is due to missing hardware info and seems to have
gotten better in later kernels. There are some things that might be
nice to do that we haven't done - e.g. there are different versions of
the 5mx board, and some of the early ones have an Atmel flash part on
board instead of ROM (though I think it is only 2MB IIRC) which could
in theory be used to boot the kernel I think. I don't know if we have
all the information for this, but other than that the info that we got
from Psion covered the 5mx pretty much completely.
The series 5 is very similar to the 5mx but the sources are old.
The netbook/series 7 has been a bit of a guessing game - there is
still quite a lot missing and the system has always seemed quite flaky
to me. I dimly recall there was incomplete information from Psion at
some point... not really sure though, and it certainly wasn't enough
even if there was. Unfortunately it appears what we need to know may
have been lost in time - none of us have any info, and it appears Psion
and Symbian don't either, or if they do they aren't really sure where
it is... as Wookey said Psion/Symbian/Nokia might have the sources
somewhere. The netbook was not a standard SA-1100 machine, since it had
a couple of custom chips (a big ASIC in particular) and no one knows
exactly how they work, so it can't really be reverse engineered easily.
And there are sources for the netbook pro but it's never been
supported by or had any attention from openpsion - these are just
sources found somewhere on the net by someone. There are still people
around that were involved (e.g. Wookey, Costas, some other linux kernel
developers names have cropped up) and might be able to help, but they
haven't exactly been green lighted to help (though as I said before,
Costas said he had been told to help us out, I'm not really sure in
what capacity or what he was allowed to share).
Plus we have haemorrhaged both users and developers over time (let's
face it, our machines are now ancient history in computing terms) and
I'm not sure that even if we _had_ the info we needed there would be
anyone able to put in the time and effort required to improve the
kernels. That doesn't mean it wouldn't be good to make the hardware
information available though.