NEX750
nexaddr = (NEX750 + NEXSIZE * adapt);
sa.sa_ioh = vax_map_physmem(NEX750 +
sa.sa_ioh = vax_map_physmem(NEX750 +
sa.sa_base = NEX750;
sa.sa_ioh = vax_map_physmem(NEX750 +
sa.sa_ioh = vax_map_physmem(NEX750 +