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Why the primask not work when code from boot to mainApp?

Question asked by Lei Mao on Jun 23, 2013
Latest reply on Jun 25, 2013 by Lei Mao

I writer a bootload, and I find when the code jump from boot to mainApp, it Fail. And I find I use PIT interupt in mainApp, So  I reset PIT interupt in mainApp when 

I jump to boot from App, It works ok.

But I realy do not understarand I shut down the primask, before I jump, It should close all interupt. Why the primask not work when code from boot to mainApp?

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