(enable isr)

Many many moons ago a developer wrote a PCI daemon for FMI/OS. The daemon never made it into the main distribution because there were issues with needing shared interrupts in the ISR handler in order to properly handle PCI. Instead of working the problem out with a simple solution to kick start PCI development, the various developers argued over the best way to implement a low impact long-term solution to the ISR problem in regards to context switching. This is, putting it mildly, unexceptable (unacceptable ?). All that was achieved was that FMI/OS never became recognized as a PCI capable system, and quite a few PCI drivers that were available for FMI/OS never made it into the system, making FMI/OS more difficult to work with than it needs to be.