程序的具體內(nèi)容如下：

$MOD52?
? ORG?? 0000H
???????? LJMP? MAIN
???????? ORG?? 0003H
???????? LJMP? 0100H
???????? ORG?? 0013H
???????? LJMP? 0150H
???????? ORG?? 0050H
MAIN:??? CLR?? A
???????? MOV?? 30H , A?????????? ;初始化緩存區(qū)
???????? MOV?? 31H , A
???????? MOV?? 32H , A
???????? MOV?? 33H , A
???????? MOV?? R6? , A
???????? MOV?? R7? , A
? SETB? EA
? SETB? EX0
? SETB? EX1
? SETB? IT0
? SETB? IT1
? SETB? PX1
NEXT1:?? ACALL HEXTOBCDD??????? ;調(diào)用數(shù)制轉(zhuǎn)換子程序
???????? ACALL DISPLAY????????? ;調(diào)用顯示子程序
???????? LJMP? NEXT1

???????? ORG?? 0100H? ;中斷0服務(wù)程序
?LCALL? DELY
?mov 70h,#2
?djnz 70h,next
?JBC? F0,NEXT
??????? SETB F0
??????? CLR P0.0
?LCALL? DELY0
?SETB?? P0.0????????
???????? MOV?? A , R7
? ?ADD?? A , #1
? ?MOV?? R7, A
? ?MOV?? A , R6
???????? ADDC? A , #0
? MOV?? R6 , A
? CJNE? R6 , #07H , NEXT
? CLR?? A
? MOV?? R6 , A
? MOV?? R7 , A
NEXT:? RETI
? ORG?? 0150H? ??;中斷1服務(wù)程序
?LCALL? DELY
?mov 70h,#2
?djnz 70h,next2
?JBC? F0,NEXT2
?SETB? F0
?CLR P0.0
?LCALL? DELY0
?SETB?? P0.0??
?CLR C???????????
???????? MOV?? A , R7
?
? SUBB?? A , #1
? MOV?? R7, A
? MOV?? A , R6
?? SUBB? A , #0
? MOV?? R6 , A
? CJNE? R6 , #07H , NEXT2
? CLR?? A
? MOV?? R6 , A
? MOV?? R7 , A
NEXT2:? RETI

? RET
TAB:???? DB??? 03FH , 06H , 5BH , 4FH , 66H , 6DH , 7DH , 07H , 7FH , 6FH?? ;七段碼表
DELY:??? MOV?? R1,#80
D1:??????? MOV??? R2,#100
???????????? DJNZ?? R2,$
?DJNZ??? R1,D1
?RET?
DELAY:?? MOV?? TMOD , #01H?????????? ;延時子程序
???????? MOV?? TL0? , #0FEH
???????? MOV?? TH0? , #0FEH
? SETB? TR0
WAIT:??? JNB?? TF0? , WAIT
???????? CLR?? TF0
? CLR?? TR0
? RET
DELY0:?? MOV? R1,? #200
D3:? MOV? R2,#250
???????? DJNZ? R2,$
? DJNZ? R1,D3
?
? RET?
???????? END
????????