Wann FAR wann nicht FAR bei ASM Porgramm ?

.model medium, basic
.stack 200h
.386
.code


public AddFour


;  Our stack:
;               Number       6
;               QB Seg       4
;               QB Off       2
;               BP           0


AddFour proc
push bp
mov  bp, sp
mov  ax, [bp+6]
add  ax, 199
pop  bp
ret  2
AddFour endp


end

.model medium,basic     ;directive for the medium model
.code                   ;directive for code segment header
.286                    ;directive to allow 286 opcodes


public Addition         ;declares procedure Addition callable from QuickBASIC


;to use the function in QuickBASIC add this line to your program:
; DECLARE FUNCTION Addition% (firstvar%, secondvar%)


Addition        PROC    FAR     ;all procedures (SUBS/FUNCTIONS) must be
;declared FAR, for the code segment could not
;be the same as the one you're calling your
;procedure from!


push bp         ;save base pointer on stack
mov bp,sp       ;use base pointer instead of stack pointer
mov ax,[bp+6]   ;last variable (stack!)
mov bx,[bp+8]   ;first variable (stack!)
pop bp          ;restore base pointer from stack


add ax,bx       ;add bx to ax without carry


RET 4           ;4 is the number of BYTES (2*INTEGER!) you
;used (got from the stack)


Addition        ENDP            ;if declared as FUNCTION, AX contains the
;result
END             ;directive to stop the assembler