 The syntax, directives, macro language, and lexical substitution operators of VAX Macro previously appeared in Macro-11, the assembler for the PDP-11 series of computers.VAX Macro or, as it was also known, Macro-32, supported the VAX processors developed and manufactured by Digital Equipment Corporation.It ran under the VAX/VMS operating system and produced object files suitable for the VAX/VMS linker.