BITNCF            742 src/simh/sim_defs.h #  define BITNCF(sz)           {"",  0xffffffff, sz}            /* Don't care Bit Field definition */
BITNCF            772 src/simh/sim_defs.h #  define BITNCF(sz)           {"",   0xffffffff, sz}             /* Don't care Bit Field definition */