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Interrupt handling



hello,

I'm trying to use the external IRQ-pin of the ETRAX-100, but despite
quite some digging in the code, I'm not able to find a way to program
the ISR. Where do I enable the IRQ with internal vector number? And
where do I write the code for that specific ISR?

Maybe this fits in a chapter of the 'Designers Reference', if so, could
I get a <possibly preliminary> version of that chapter, or a small
howto?

thank you in advance,

Stijn Decneut