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

["Hicks, Jamey" <Jamey dot Hicks at compaq dot com>]

Certainly blit to/from CF is a useful thing.  I'm working on that right
now.

> -----Original Message-----
> From: Noel J. Bergman [mailto:noel@devtech.com]
> Sent: Wednesday, February 06, 2002 10:59 AM
> To: Hicks, Jamey
> Cc: ipaq@handhelds.org; eCos Discussion; Ted Serreyn
> Subject: RE: [iPAQ] Restore CE (or bootldr) from Redboot?
> 
> 
> 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 HTC
> 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
> 
>