Try This one. It has always worked fine for me.
Hugh


;*************************************************************************
; DELAY LOOP CAUSE THE LCD IS SLOW TO WARM UP
;USING A 11,059,200 hertz CRYSTAL THE TOTAL LOOP TIME IS .0356944 SEC
;*************************************************************************
DELAY:
MOV R0,#00h ; 2 cycle
AGAIN:
MOV R1,#00h ; 2 cycle
HERE:
NOP ; 1 cycle
NOP ; 1 cycle
DJNZ R1,HERE ; 4 cycle
DJNZ R0,AGAIN ; 4 cycle
RET
;