HI,
here are some question that i not sure about it, please help!

1.for lcd initialize, mov a, #38h, do we really need to send it 3 times. why?

2. READY:
SETB P1.7 ;make p1.7 input port
CLR RS ;RS=0 access command reg
SETB RW ;R/W=1 read command reg
BACK:
CLR CE ;E=1 for H to L pulse
SETB CE ;E=0 H to L pulse
JB P1.7,BACK ;stay until busy flag=0
RET
and
READY:
SETB P1.7 ;make p1.7 input port
CLR RS ;RS=0 access command reg
SETB RW ;R/W=1 read command reg
CLR CE ;E=1 for H to L pulse
SETB CE ;E=0 H to L pulse
JB P1.7,$ ;stay until busy flag=0
RET
are the two code the same? what actually the sign $ mean?

3. what the main effect on the using the acall and lcall instruction?

4. if i using the crystal of 12MHz, how can i generate the baud rate of
9600? or any suggestion.
thanx in advance for any reply.