以下程序已实际调试运行通过）

; ---AT89C2051加氧泵控制器源程序-OK！

org 0000h

ajmp main

nop

org 01bh

clr tr1

ajmp timon

org 30h

main:mov 40h,#00h

mov 41h,#00h

mov 42h,#00h

mov 43h,#02h

mov 44h,#00h

mov 45h,#00h

mov 46h,#00h

mov 4ah,#02h

mov 4bh,#00h

mov 4ch,#01h

mov 4dh,#05h

nca equ 48h

ncb equ 49h

mov p3,#0ffh

mov sp,#50h

mov tmod,#10h

mov ie,#88h

mov tl1,#46h

mov th1,#76h

clr nca

clr ncb

setb tr1

clr p3.7

disp:;------显示-------

mov r3,46h

cjne r3,#1,ct

mov dptr,#tab

clr p3.2

mov a,42h

movc a,@a+dptr

anl p1,#01h

orl p1,a

jb ncb,xsb

setb p3.3

lcall ms10

xsb: acall key

clr p3.3

jb nca,ys1

mov a,43h

movc a,@a+dptr

anl p1,#01h

orl p1,a

setb p3.2

ys1: lcall ms10

ajmp disp

ct: mov dptr,#tab

clr p3.2

mov a,42h

movc a,@a+dptr

anl p1,#01h

orl p1,a

jb ncb,xsd

setb p3.3

lcall ms10

xsd: acall key

clr p3.3

jb nca,ys2

mov a,43h

movc a,@a+dptr

anl p1,#01h

orl p1,a

setb p3.2

ys2: lcall ms10

ajmp disp

timon:;定时计数中断子程序--

setb rs0

push psw

push aCC

mov tl1,#46h

mov th1,#76h

setb tr1

inc 40h

mov r0,40h

cjne r0,#8,tim

mov 40h,#00h

cpl p1.0

t11: inc 41h

mov r0,41h

cjne r0,#60,tim

mov 41h,#00h

mov r0,42h

cjne r0,#00,tia

ajmp tib