include ht47c20.inc
data .section 'data'
count db ?

code .section at 0 'code'
org 00h
jmp start
org 04h
reti
org 08h
reti
org 0ch

jmp rtc_int
org 10h
reti
;****************************
start: clr iNTC0
clr intc1
clr count
MOV a,07h
MOV rtCC,a
set intc0.3
set intc0.0
jmp $
;****************************
rtc_int:
inc count
reti
;********************************

Ht47實(shí)時時鐘（RCT）應(yīng)用