- Add support for ALT_BREAK_TO_DEBUGGER; this is the only reliable way to   trigger a breakpoint with this chip. - Fiddle the right bits in the cn input and output routines to disable port   interrupts and enable visibility of the masked interrupt status bits. - Register a shutdown final event handler to put the chip back in the mode   that the prom expects.
- Add support for ALT_BREAK_TO_DEBUGGER; this is the only reliable way to
  trigger a breakpoint with this chip.
- Fiddle the right bits in the cn input and output routines to disable port
  interrupts and enable visibility of the masked interrupt status bits.
- Register a shutdown final event handler to put the chip back in the mode
  that the prom expects.

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