Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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;* Global variables defined with EXTERNDEF are public in the module
;* in which they are defined, and external in other modules in which
;* they are used.
;*
;* Shows:   Directive             - EXTERNDEF
;*          Predefined text macro - @CurSeg
 
        .DATA
        EXTERNDEF   vconfig:VIDCONFIG   ; Video configuration
        EXTERNDEF   _psp:PSEG           ; Segment of Program Segment Prefix
        EXTERNDEF   _env:PSEG           ; Segment of environment block
@CurSeg ENDS    ; End .DATA so any subsequent include is outside segment
                                    -♦-