;*****************************************************************************
;*
;*                            Open Watcom Project
;*
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;*
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;*    This file contains Original Code and/or Modifications of Original
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;*****************************************************************************


;<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
;<>                                                                <>
;<>     FORTRAN-77 STOP and PAUSE statements.                      <>
;<>                                                                <>
;<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

include fcdef.inc

        rtxref  Stop
        rtxref  Pause

        fmodstart       fcstop


fcode   RT_STOP
        call    StopPause
        exit_fcode                      ; switch to run-time environment
        docall  Stop                    ; stop
efcode  RT_STOP


fcode   RT_PAUSE
        call    StopPause
        exit_fcode                      ; switch to run-time environment
        docall  Pause                   ; pause
        enter_fcode                     ; switch to F-Code environment
        next                            ; execute next F-Code
efcode  RT_PAUSE


defn    StopPause
        getword AX                      ; get pointer to SCB
        mov     DX,DS                   ; ...
        cmp     AX,0                    ; check if NULL pointer
        _if     e                       ; if NULL pointer
          sub   DX,DX                   ; - indicate NULL pointer
        _endif                          ; endif
        ret                             ; return
endproc StopPause

        fmodend
        end
