Library /sys$common/syshlp/ncphelp.hlb SET, NODE, HARDWARE ADDRESS h-address  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Identifies the address originally assigned to the controller for
 the system on the adjacent node.  Used during operations such as
 downline loading to communicate with the system before the system has
 set up its physical address.