I think that in tutorial:Introduction to LCD programming there is an error in wait_lcd routine

wait_lcd:
setb en
clr rs
setb rw
mov data,#0ffh
clr en --->error
mov a,data
jb acc.7,wait_lcd
ret
u must put the instr clr en after
jb acc.7,wait_lcd (check busy flag)
because u read from lcd.
I test all the code in tutorial with m1632 seiko and it works only if u change this line.
could anyone tell me ur opinion
thanks