Default Interrupts: How to tell what was the cause? PIC24FJ64GA702
When an interrupt occurs, (unhandled / default) how does one find out what the cause was?
I mean which register tells me what is currently happening?
There is the SR register and it shows the IPL (priority level) but I can't correlate the level to a vector.
There is the INTTREG with VECNUM bits but that always seems to show 0x0427, indicating a reserved vector 0x27, even for valid interrupts.
How does one check this?