Hello , You can see that i have no
luck with this chip :)

i wrote a program to write
text on my 16x2 Lcd.
the problem is, that i only
see on my lcd cursor on the end of the first line i think.

here is the program , (you can ask me to email you if u like ) - after the program i'll mention how i connect
every pin.
********************

jmp start
MSG1: db 'Ofir Yacobi V1.0',000

stringwrite:
clr a
movc a,@A+dptr
jz eom ;jump to end of message
call cmdwrite
inc dptr
jmp stringwrite
eom: ret



cmdwrite:
Mov 90h,A ; Post Accumulator at LCD data input
Clr 0B3h ; Set 0B3h low (Instruction)
Clr 0B5h ; Set 0B5h low (Write)
Nop ; Wait circuit settling
Setb 0B4h ; Tells the LCD to work (receive instruction byte)
Nop ; Wait a little bit
Nop ;
Clr 0B4h ; Drop the selection line
Ret ; Return to Caller
;END Of "cmdwrite"

LCDInitialize:
Mov A,#038h ; Data Lenght (8 bits), 2 lines, char 5x7
Call CmdWrite ; Needs 3 times this byte (1st)
Call Delay10ms ; Some delay routine 10 milliseconds
;
Call CmdWrite ; (second)
Call Delay10ms ; Some delay routine 10 milliseconds
;
Call CmdWrite ; (third)
Call Delay10ms ; Some delay routine 10 milliseconds
;
Mov A,#006h ; Move direction and Shift Display
Call CmdWrite ;
Call Delay10ms ; Some delay routine 10 milliseconds
;
Mov A,#00Eh ; Display and Cu0B3hor On, not blinking
Call CmdWrite ;
;
Mov A,#001h ; LCD Clear
Jmp CmdWrite ; ... and return to caller
ret

;END OF INiTIaLIZATION

delay10ms:
nop
nop
nop
nop
nop
nop
nop
nop
ret
;END OF Delay
start:
call LCDInitialize
mov dptr,#msg1
call stringwrite

end
********************************
i can guess my program is not good..

connections:

8052 LCD
---- ---
1 7
2 8
3 9
4 10
5 11
6 12
7 13
8 14
13 4
14 6
15 5


Ofir.