atusb/fw/board_app.c (INT0_vect): limit interrupt serials to 0x80-0xff
atusb/fw/board_app.c (INT0_vect): limit interrupt serials to 0x80-0xff

This leaves the range 0x00-0x7f for other uses.

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan