ACL, i have my kernel setup with the DSP interrupt always enabled, and when it goes off it just writes to console that the mysterious event has happened, but it still does not work.
I have disassemblies of NK as well, but they don't seem to do any good. I can't figure out what code handles a particular sys call.
All implementatations are required to implement this
http://msdn.microsoft.com/en-us/library/ms904913.aspx, which does the interrupt mapping from user to hardware. I couldn't find this in NK.
Maybe writing some windows ce code that hooks all of the interrupts and then checks for changes in VIC memory would work to figure out what the mapping is.