MASK70           2805 src/dps8/dps8_math.c   zFrac &= MASK70;
MASK70           2951 src/dps8/dps8_math.c     zFrac = and_128 (zFrac, MASK70);
MASK70           2954 src/dps8/dps8_math.c     zFrac &= MASK70;