test

三数相加

mov al,0

mov si,offset buf

add al,[si]

inc si 

add al,[si]

mov sun,al

简化段定义结构

.model small

.data

buf db 35h,78h,0a5h

sum db ?

.code

mov ax,@data

mov ds,ax

mov al,0

mov si,offset buf

add al,[si]

inc si

add al,[si]

mov sun,al

mov ah,4ch

int 21

end