MOV[SI],AH;高半字节ASCI码字符→S DEC SI INC DI 00034<L POP CX W 0001H|12<H LOOP AB MOV DX, OFFSET OBUF (0002H 31 H MOV AH 9 0003H INT 21H OBUF广0004H33 ret 000534<L begin endp 006124<s code ends end begin 显示:1234MOV [SI],AH ；高半字节ASCII 码字符→[SI] DEC SI INC DI POP CX LOOP AB MOV DX,OFFSET OBUF MOV AH,9 INT 21H ret begin endp code ends end begin 显示：1234 0000H 34 0001H 12 0002H 0003H 0004H 0005H 0006H 24 W OBUF L H 31 32 H 33 34 L $