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- ;This file is a test of using external assembly language
- ;routines with Turbo C
- ;
- _TEXT segment byte public 'CODE' ;define segment
- assume cs: _TEXT
- public _clear;
- public _gotoyx;
- ;
- ;***** The _clear function can be adapted to be called with
- ; parameters, to be used with windows.
- ; Therefore, it sets up the bp register for accessing parameters.
- ;
- _clear proc near ;define procedure
- push bp ;save old bp
- mov bp,sp ;load current sp to bp
- mov ah,6 ;window scroll function
- mov al,0 ;code to blank screen
- mov ch,0 ;y value
- mov cl,0 ;x value
- mov dh,24 ;y1
- mov dl,79 ;x1
- mov bh,7 ;blank line attribute
- int 10h ;video interrupt
- pop bp ;restore bp
- sub ax,ax ;zero ax
- push ax ;push row number
- push ax ;push column number
- call _gotoyx ;position cursor at 0,0
- pop cx ;cleanup parameters off the stack
- pop cx ; ditto
- ret
- _clear endp ;end procedure
- ;
- _gotoyx proc near ;define procedure
- push bp ;save old bp
- mov bp,sp ;
- mov ah,2 ;function number
- mov dh,[bp+4] ;y in dh
- mov dl,[bp+6] ;x in dl
- mov bh,0 ;current page
- int 10h ;video interrupt
- pop bp ;restore bp
- ret ;near return
- _gotoyx endp ;end procedure
- ;
- _TEXT ends
- end