Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
INVD/WBINVD Instruction
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  Title:    Invalidate Data Cache                 Flags: O D I T S Z A P C
            80486 Only                                   ═════════════════
                                                              -none-
  Syntax:   INVD
            WBINVD
 
  See also: .486, INVLPG
 
  Description:
 
     INVD empties contents of the current data cache without writing
     changes to memory. WBINVD also empties contents of the current
     data cache, but first writes changes to memory.
 
     Proper use of these instructions requires knowledge of how
     contents are placed in the cache. INVD and WBINVD are intended
     primarily for systems programming. See Intel documentation for
     details.
                                    -♦-