PUSH BX ;(sp)=100+2=102SUB BX,AX ;bx=80H-1H=79HXOR AX,BX ;ax=00000001^01111001=01111000=70HPUSH AX ;(sp)=102+2=104POP CX ;(sp)=104-2=102,(CX)=70H所以(SP)=102, (CX)=70H
