UBoot

On the continuing voyage with UBoot and Nios.....

Can anyone suggest a possible cause for the following:

Monday morning, start up, UBoot runs but fails to autoboot into the main app.

Try running uboot manually and executing bootm 0, app fails to run,

Try power cycling and generally playing around in a similar way a few times, no success.

Download the target app directly from NIOS IDE, it works fine,

try uboot again doesn't work.

power cycle the board, uboot now runs it..

Try downloading the app via dhcp and reflashing it, all works okay, try bootm 0, no success, however if I try bootm from the dhcp target download location it works?!.

This goes on in a similar vain and has been doing it all day (I've checked for overheat/timing problems with the old can of freezer spray but no joy).

It just seems that sometimes in the final call to kernel() in do_linux_bootm nothing happens and I don't know why.

Frankly I'm a bit stumped how to even debug this otherwise working board, has anyone got any suggestions?

Regards,

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