VAX MACRO

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VAX MACRO is the computer assembly language implementing the VAX instruction set for the OpenVMS operating system, originally released by Digital Equipment Corporation in 1977.

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. The MACRO-32 assembler supported the VAX processors developed and manufactured by Digital Equipment Corporation. It ran under the VMS operating system and produced object files suitable for the VMS linker. Both the MACRO-32 assembler and the linker were bundled with the operating system.

In order to port VMS to the Alpha, VAX MACRO was implemented for the Alpha architecture. Since the Alpha used a different instruction set than the VAX, MACRO-32 was implemented as a compiler, compiling VAX assembly language into Alpha instructions.[1]

The Alpha AXP chips have their own native instruction set architecture, the OpenVMS assembler for Alpha assembly code is called MACRO-64.[2]

A compiler from MACRO-32 is available for Intel Itanium architecture,[3] and for x86-64.[4]

References[]

  1. ^ Nancy P. Kronenberg; Thomas R. Benson; Wayne M. Cardoza; Ravindran Jagannathan; Benjamin J. Thomas III (1992). "Porting OpenVMS from VAX to Alpha AXP" (PDF). Digital Technical Journal. 4 (4).
  2. ^ "VSI OpenVMS Programming Concepts Manual, Vol. 1" (PDF). vmssoftware.com. April 2020. Retrieved 2020-10-07.
  3. ^ HP OpenVMS ask the wizard - Macro32 Assemblers and Compilers? OpenVMS I64?
  4. ^ "State of the Port to x86, March 2016" (PDF). March 2016. Archived from the original (PDF) on 2019-10-29.

External links[]

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