Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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  Syntax:   @Interface
 
  See also: .MODEL, OPTION LANGUAGE:
 
  Description:
 
     Predefined equate returning a byte-size bit flag describing the
     current language and operating-system types.
 
       Bits 0-2          Bit 7
 
       000   Reserved     0   MS-DOS or Windows
       001   C            1   OS/2
       010   SYSCALL
       011   STDCALL
       100   Pascal
       101   FORTRAN
       110   Basic
       111   Reserved
 
     All other bits are reserved for future use, and their values are
     undefined.
                                    -♦-