I am using Port1 as the data bits, and

P3.0 (RxD) as RS
P3.1 (TxD) as RW
P3.2 (_INT0) as EN

DATA EQU 090H

my LCD polling routine is...

LCDPOLL:
SETB EN
CLR RS
SETB RW
MOV DATA,#0FFH
MOV A,DATA
JB ACC.7,LCDPOLL
CLR EN
CLR RW
RET

How can I improve this so that "framing" doesn't occur?