HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                     INT 2A,81 - End DOS Critical Section

       AH = 81h
       AL = critical section identifier (00-0F)
          = 01  DOS kernel, SHARE.EXE and network data structure integrity
          = 02  DOS kernel, device driver exclusivity
          = 05  IFSFUNC (Installable File System, IFS, DOS 4.0+)
          = 06  IFSFUNC (Installable File System, IFS, DOS 4.0+)
          = 08  ASSIGN.COM


       returns nothing


       - indicates that a critical code section is being exited
       - this function is usually hooked rather then called directly from a
         user application
       - see  

Esc or Alt-X to exit int 2a,81 Home/PgUp/PgDn/End ←↑↓→