ORG 0000h
ljmp main
org 000bh
ljmp itm0
org 0030h
main: clr P1.0
lcall dly500
cpl P1.0
lcall dly500
ljmp main
dly500:
mov tmod,#0001h
mov tl0,#0b0h
mov th0,#3ch
setb ea
setb et0
setb tr0
mov r0,#10
loop: mov a,r0
jz return
ljmp loop
itm0:
mov tl0,#0b0h
mov th0,#3ch
dec r0
reti
return:
ret
end
麻烦能人解析一下!!!!