;在内存a1和a2分别存放一单字节有符号整数,编程求其乘积并
;存入a3字单元。
data   segment
a1     db -200      ;=38H
a2     db 40        ;=28H
a3     dw 0         ;结果为08C0H
data   ends
code   segment
       assume cs:code,ds:data
start: mov ax,data
       mov ds,ax
       mov al,a1
       imul a2
       mov a3,ax
       mov ah,4ch
       int 21h
code   ends
       end start