interfacing to custom logic with an interrupt

I wasn't using a data cache, but have changed to using the access macros to avoid possible problems later down the track. Thanks for the tip.

I've managed to sort out the issue since and are able to clear the interrupt. It was (embarrassingly) a combination of logic functions and how I was viewing the problem.

However the DSR is still not being called. We are running from ROM only, and need to get debugging capability up and running to go further with this one...