[ECOS] RE: [iPAQ] Restore CE (or bootldr) from Redboot?

Ted Serreyn ted@serreyn.com
Wed Feb 6 12:43:00 GMT 2002

Quoting "Noel J. Bergman" <noel@devtech.com>:

Exactly,  Easy way to switch oses.  As long asyou have backed up your data 
properly with wince, you should just be able to do a restore, reset and you are 
back running wince.

I envision this is something that I could run linux all weekend and work/play 
with it, then return Monday morning with a wince handheld again.

Ted Serreyn

> Jamey,
> I believe that Ted meant "switch" as in re-load, not as in run from
> CF.
> In any event, what would happen if the bootloader worked with CF (as the
> loader does), and provided options to blit both Flash and DRAM to/from
> CF?
> So if I held the action key upon warm reset, it'd be offered the option
> to
> save or restore a compressed image?  At least in theory, wouldn't that
> provide the ability to save my current WinCE image, and load in my
> saved
> linux image; and later to restore my WinCE image including data with
> perfect
> binary fidelity?
> 	--- Noel
> -----Original Message-----
> From: ipaq-admin@handhelds.org [mailto:ipaq-admin@handhelds.org]On
> Behalf Of Hicks, Jamey
> Sent: Wednesday, February 06, 2002 8:07
> To: Ted Serreyn
> Cc: ipaq@handhelds.org; eCos Discussion
> Subject: RE: [iPAQ] Restore CE (or bootldr) from Redboot?
> > Ok, how about this,  Given that you [have] redboot installed, is there
> a
> > mechanism to just put linux on a flash card and wince on a flash
> card
> > then switch as needed?
> That might be the ideal dual boot scenario, but the PocketPC images
> for
> the iPAQ will not run from a flash card -- you have to install them in
> flash.
> The dual boot configuration that I think is feasible is to be able to
> boot either WinCE, installed in Flash, or another operating system
> such
> as Linux from external media such as CF, SD, etc.
> One difficulty in doing this is being able to implement
> suspend/resume.
> The firmware has to be able to decide whether it is resuming WinCE or
> Linux before it turns DRAM back on.  (If it is resuming WinCE, the
> firmware does not turn on DRAM -- WinCE does).  We need a SA1100
> register that we know is used differently by PocketPC and Linux that
> the
> firmware can examine.
> Jamey

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