SD137 is a Super Directory Program for use on any and all system's
by selectively enabling/disabling options. It contains all changes
by Carson Wilson in SD133 and has as it's base SDZD136. SD137 adds
support for Z3's TCAP(for REVID)  and Z34+'s DRVVEC (for LO/HIDRV
table). Should assemble with LASM3 for all combinations of options set
by the operator.