Re: [Ipodlinux-devel] Bootloader

[Bernard L. <le...@bo...>]

Regarding the inital problem, the shell that starts up if the rc script has
errors seems to get the keystrokes ok so my best guess is that you don't have
the right standard input.  Perhaps if you open /dev/console explicitly?

Also you might want to take advantage of the 5 images from the bootloader. 
Come up with 5 test programs and simply put them all on.  Then select each one
using the bootloader keys.

Jim, seems you missed the announcement ;)

There is now a simple bootloader that will allow you to selectively boot one
of 5 images on your iPod.  Generally this would be the Linux kernel and the
Apple OS.  Take a look at the mailing list archive and/or website for more info.

As for the debugger, patching the binary to get something attached to the
timer IRQ or something probably wouldn't be too hard but I'm not sure what
help this would be.

Most of the information I need is about how the hardware works and that can be
analysed statically.

cheers,
bern.

Jim Witte <js...@bl...> said:

> > i'm spending some time to play with ipod-linux. As i only have usb and
> > i'm bored to reboot after each test, i'm doing a little shell
> > interface and i want to  use the ipod-wheel in my program.
> 
>    Has there been any progress making a bootloader that would allow you 
> to relatively easily switch between Linux and the Apple Pixo OS?
> 
>    An even more improbably possibility comes to mind: would it be 
> possible to put some kind of resident debugger (memory dump, register 
> dump) in memory, then start up the Apple Pixo OS, while the debugger 
> program is still active?  This would allow us a way to probe how the 
> Pixo OS is set up.  It's a damn shame they don't have any DDK's with 
> full symbolic information on the ROM, like they did with the Newton..
> 
> Jim Witte
> js...@bl...
> Indiana University CS
> 
> 
> 
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