Move to having a caps flag.  Newer versions of the AT91 family don't need the bouncing, so save a few copies in that case.  Also convert 4-bit code selection to using it.
Move to having a caps flag.  Newer versions of the AT91 family don't
need the bouncing, so save a few copies in that case.  Also convert
4-bit code selection to using it.

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