Re: [jornada] Jornada 820

On Mon, Dec 02, 2002 at 06:16:07PM +0900, Hiroshi Ishii wrote:
> I want to work with *hpcboot* only. So, I refer to
> Linux on the Jornada 720 via hpcboot.
> (http://acid.ch.pw.edu.pl/~sq5bpf/mylinux/linux-jornada720/)
> Get source from this site(linux-2.4.18-rmk2-hh2-jornada720.tgz),
> hacking for jornada820 referring to your patch. Now my status
> is bellow.
A big wow! I never went as far as you did! You got a command prompt!
BTW, I think it's great to work with hpcboot only, but I do not regret
using blob, since only with blob could I debug far enough to find
memory-mapped real-time clock that writes right into where the kernel
is usually loaded :)

> It seems to work, But Penguin don't show on display.
The 720 has a special chip for its framebuffer, whereas the 820
uses the builtin SA-1100 framebuffer. So you need to get sa1100fb.c
working, using the same register values as Windows CE uses
(see them in on my site). You could either reverse-engineering the
linux parameters needed for linux to compute these values, or you
could "cheat" and have linux special-case the 820 to magically compute
the right values for the 820.

I readily admit I have no clue about the keyboard and mouse drivers.

Please keep me tuned regarding your progress with the 820!

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Received on Mon Dec 02 2002 - 14:05:07 EST