Thanks for such a kind reply but the main problem is the assembly program is prewriten and i just have to
write the C code to replace kbrd in asm file
I have posted both the files on my home pafe

please see them for more clear view of my problem

http://..../user/ssachin191


please reply soon as i just have 2 days
and the way i have done i.e. by returning a value is not approved

Thanks in advance

sachin