389.asm

单片机开发资料光盘-双龙-686M.zip

      .include "m103def.inc"
       .org $0000
     rjmp   RESET
    .cseg  
    .org  $0010
   RESET:ldi  r16,5
         ldi  r17,5
         mov  r20,r16
         mov  r21,r17
        muls r21,r20      ; 有符号数r21和r20相乘
        movw r20,r0       ; 拷贝结果回 r21:r20