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--- Comment #3 from Christophe Coutand <ecos@hotmail.co.uk> 2011-08-03 01:50:54 BST ---
I don't know enough about the MIPS architecture to give you pointers. What type
of debugging facility do you have with the simulator? Can you set breakpoints
for debugging? If you get interrupts, you should hit the
__default_interrupt_vsr function call. The RTC clock is default mapped as
following:

Look inside packages\hal\mips\arch\current\include\hal_intr.h:

// The vector used by the Real time clock. The default here is to use
// interrupt 5, which is connected to the counter/comparator registers
// in many MIPS variants.

#ifndef CYGNUM_HAL_INTERRUPT_RTC
#define CYGNUM_HAL_INTERRUPT_RTC            CYGNUM_HAL_INTERRUPT_5
#endif

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