PDP-11 Extended Instruction Set

From Computer History Wiki
Revision as of 16:53, 28 October 2022 by Jnc (talk | contribs) (also not on the /04)
Jump to: navigation, search

The Extended Instruction Set is an extension to the basic PDP-11 instruction set; it includes hardware multiply and divide, and also multi-bit shifts. The exact instructions included in the EIS are:

  • MUL
  • DIV
  • ASH
  • ASHC

It was not available on the earliest PDP-11 models (the PDP-11/20 and the PDP-11/05), and the later PDP-11/04; it was available as an option for the PDP-11/40 and the PDP-11/03; it was standard on all other PDP-11 models.

See also

Retrieved from "https://gunkies.org/w/index.php?title=PDP-11_Extended_Instruction_Set&oldid=28022"