I think Vijayganesh S has misunderstood how he can address his 8255. He writes:

BUT IN MY USER MANUAL THEY HAVE GIVEN A 16-MEMORY I/O FOR 8255 I/O INTERFACE

i.e., from
FFOC.......PORT A
FFOD.......PORT B
FFOE.......PORT C
FFOF................ONE PARALLEL PORT
FF10.......PORT A
FF11.......PORT B
FF12.......PORT C
FF13................SECOND PARALLEL PORT

I suppose he thinks that he must press a 16-bit address into R0. That's why I suggested reading the "bible" and Erik's post with a hint on P2