Allow the interrupt controller to be probed - this picks up the Heathrow PIC, while not affecting the OpenPIC.
Allow the interrupt controller to be probed - this picks up the
Heathrow PIC, while not affecting the OpenPIC.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase