1.asm

汇编语言上机第一题:三个无符号数比大小,此程序相当于C语言中的SWAP语句

        DATA  SEGMENT
           X  DW        67H
           Y  DW        36H
           Z  DW        45H
         MAX  DW        ?
         MIN  DW        ?
         MID  DW        ?
        DATA  ENDS
        CODE  SEGMENT
              ASSUME    CS:CODE,DS:DATA
      START:  MOV       AX,DATA
              MOV       DS,AX
              MOV       AX,X
              MOV       BX,Y
              MOV       CX,Z
              CMP       AX,BX
              JGE       NEXT
              XCHG      AX,BX
       NEXT:  CMP       AX,CX
              JGE       SEC
              XCHG      AX,CX
        SEC:  CMP       BX,CX
              JGE       DONE
              XCHG      BX,CX
       DONE:  MOV       MAX,AX
              MOV       MID,BX
              MOV       MIN,CX
              MOV       AH,4CH
              INT       21H
        CODE  ENDS
              END       START