RE: [jornada] Jornada 820 Flashboard?

Hello, David!

Good to see people keeping up with what is going on on other
mail boards! I've looked over the photos of the Jornada 820
you so kindly posted. At this point, adding RAM to the 820
will be quite different than a new daughtercard for the 720.
The 820 is one monolithic board - all of the processors, RAM,
BIOS ROM, etc. are on one board where the 720 has a separate
board that has the memory and ROM on it.

I've identified the RAM chips as the two chips with the code
"KM416V4104CS-L5" printed on them. These chips are nothing
more than 4Mx16 (4 Million Addresses with 16 bits per address)
EDO DRAM. These particular chips are made by Samsung, but
they have been discontinued. However, this type of memory
is made by many manufacturers. Finding newer chips that are
pin-for-pin compatible shouldn't be too difficult.

Now, I actually would have to do a bit of experimenting to see
if the 820's board could even handle the extra memory. If the
HP engineers did their job correctly, adding memory to the 820
could be as easy as removing the old memory and replacing it
with newer, bigger pieces, or even just piggy-backing new RAM
chips on top of the old ones. However, if the engineers
short-cut the process and left out some signals, then this will
go right out the window.

However, adding some sort of contraption to allow flashing
Linux in a manner similar to what I have in mind for the 720
might be problematic because there is nowhere to physically
attach a CF card/socket to the 820's board. In this case,
you may have to settle for booting WinCE, then launching
Linux from there....

-Mark Gollahon

David Jones <goofy_36@yahoo.com> wrote ..
> Hi All
>
> I'm part of the sourceforge project porting linux to
> the jornada 820. There are some pictures of the
> daugther board up on our page. Below are some links
> to them. If you get a board working that has some
> memory and or flash memory, I'm sure several of us
> would be interested too. The Jornada820 comes
> standard with 16 meg of ram. Despite that we have
> linux mostly running on it and X running. We still
> need to port opie or something to it But we really
> need more memory to do much with it.
>
> Dave
>
> http://jornada820.sourceforge.net/pics/J820-1.jpeg
> http://jornada820.sourceforge.net/pics/J820-2.jpeg
>
> --- Mark Gollahon <golly@stellarwerx.com> wrote:
>
> > I didn't know that the 820 had a daughtercard....
> > Can you tell me if it looks the same as the 720's?
> > Better yet, can you get pictures?
> >
> > -Mark Gollahon
> >
> >
> > "Smith, Todd" <Todd.Smith@camc.org> wrote ..
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > A flashboard for the 720 or 820 would be great!
> > The more memory the better!
> > >
> > > Todd Smith <todd.smith@camc.org>
> > >
> > > - -----Original Message-----
> > > From: Mark Gollahon [mailto:golly@stellarwerx.com]
> > > Sent: Wednesday, September 01, 2004 12:10 PM
> > > To: jornada@handhelds.org
> > > Subject: [jornada] Jornada 7xx Flashboard
> > >
> > >
> > > Hello, all!
> > >
> > > I am new to this board (as my Jornada 720 is still
> > on its way), but I have
> > > every intention of running Linux on it. Since I
> > am somewhat of a hardware
> > > tinkerer and I noticed some of you talking about
> > the flashboard, I was
> > > wondering how many of you would like to have one?
> > I might be able to
> > > kickstart the process and get some if there is
> > enough of a demand.
> > >
> > > Also, I have some other questions for you in
> > relation to the flashboard.
> > > For those of you that have "taken the cover off"
> > your Jornada 7xx, is there
> > > enough room in there to put in a CF card? (Note:
> > NOT in the CF slot....)
> > > I
> > > could possibly ditch the Intel Strataflash chips
> > on the original flashboard
> > > and substitute a CF card - but I don't know if
> > there is enough room....
> > > Doing this would make it MUCH easier to flash new
> > bits into it....
> > >
> > > Finally, what about memory? I noticed in the
> > engineering docs that the
> > > StrongARM could possibly host up to 256Megs of
> > SDRAM. Any out there wanting
> > > that much?? ;)
> > >
> > > Let me know!
> > >
> > > - -Mark Gollahon
> > > -----BEGIN PGP SIGNATURE-----
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> > >
> > >
> >
> iD8DBQFBNyySdWt+RfoNiuYRAm+6AJ9P0PyeY1N4q0kPgSCkb7LLwMXFkQCaA2UT
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> > > =yy8J
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Received on Thu Sep 2 22:45:55 2004