org 00h
rs equ p1.0
rw equ p1.1
en equ p1.2
lcd equ p0
acall initialize
mov r0,#00d
mov r1,#00d
mov r2,#00d
mov r3,#00d
mov r4,#00d
mov r5,#00d
setb p2.0 ; switch has been connected
setb p2.1
setb p2.2
check: jnb p2.0,s1 ;condition checking
jnb p2.1,s2
jnb p2.2,s3 ;condition
sjmp check
s1: mov dptr,#300h
clr a
inc r0
mov a,r0
mov b,#10
div ab
mov a,b
cjne a,#00,go
inc r3
mov a,r3
movc a,@a+dptr
mov lcd,#82h
acall cmd
mov lcd,'0'
acall disp
acall delay
mov lcd,#81h
acall cmd
mov lcd,a
acall disp
sjmp check
go: movc a,@a+dptr
mov lcd,#82h
acall cmd
mov lcd,a
acall disp
sjmp check
s2: mov dptr,#300h
clr a
inc r1
mov a,r1
mov b,#10
div ab
mov a,b
cjne a,#00,go1
inc r4
mov a,r4
movc a,@a+dptr
mov lcd,#85h
acall cmd
mov lcd,'0'
acall disp
acall delay
mov lcd,#84h
acall cmd
mov lcd,a
acall disp
sjmp check
go1: movc a,@a+dptr
mov lcd,#85h
acall cmd
mov lcd,a
acall disp
sjmp check
s3: mov dptr,#300h
clr a
inc r2
mov a,r2
mov b,#10
div ab
mov a,b
cjne a,#00,go2
inc r5
mov a,r5
movc a,@a+dptr
mov lcd,#88h
acall cmd
mov lcd,'0'
acall disp
acall delay
mov lcd,#87h
acall cmd
mov lcd,a
acall disp
ljmp check
go2: movc a,@a+dptr
mov lcd,#88h
acall cmd
mov lcd,a
acall disp
ljmp check
initialize: mov lcd,#38h
acall cmd
acall delay
mov lcd,#06h
acall cmd
acall delay
mov lcd,#01h
acall cmd
acall delay
mov lcd,#0ch
acall cmd
acall delay
mov lcd,#81h
acall cmd
acall delay
mov lcd,#'0'
acall disp
acall delay
mov lcd,#82h
acall cmd
acall delay
mov lcd,#'0'
acall disp
acall delay
mov lcd,#84h
acall cmd
acall delay
mov lcd,#'0'
acall disp
acall delay
mov lcd,#85h
acall cmd
acall delay
mov lcd,#'0'
acall disp
acall delay
mov lcd,#87h
acall cmd
acall delay
mov lcd,#'0'
acall disp
acall delay
mov lcd,#88h
acall cmd
acall delay
mov lcd,#'0'
acall disp
acall delay
ret
delay: mov r6,#0f1h
abn2: mov r7,#0ffh
abn: djnz r7,abn
djnz r6,abn2
ret
cmd: clr rs
clr rw
setb en
acall delay
clr en
ret
disp: setb rs
clr rw
setb en
acall delay
clr en
ret
org 300h
db '0123456789'
