description Learn more about: @Cpu title @Cpu ms.date 12/17/2019 f1_keywords @Cpu helpviewer_keywords @Cpu symbol ms.assetid 04f9fdf6-9772-407e-9c09-c12bed29087b @Cpu A bit mask specifying the processor mode (numeric equate). Syntax @Cpu See also Symbols reference MASM BNF Grammar