Donald Catto, before I wrote the program I have every thing ready for me and they are

alphdisp.asm :- to display the clock On LCD Display.
(http://lostone.jeeran.com/Files/alphdisp.txt)

squ2int.asm :- increment a clock every second and countains interrupt service routine.
(http://lostone.jeeran.com/Files/squ2int.txt)

I wrote only about 30 lines which is the main clock program.

Thanks for replying :(

Mr_heart