Number settable by rotating switches, add pic to show MSB, LSB.
Type is in the FPGA.
Type is also in database templates.
Booting sequence:
mpsInitialize reads rotary switches for link node #, identity/type from FPGA.
loading db files uses C functions to look up loca and unit, load db with that loca and unit in the file name
mpsGetLinkNodeLOCA() and mpsGetLinkNodeUNIT() functions use link node ID # to index arrays at the top of drvMpsLinkNode.c:
char *primaries[50]
char *LOCATIONS[50]
char *locations[50]
char *UNITS[50]
char *units[50]
Add the loca and unit to these arrays following existing pattern.
