thx Ttelmah,its working with the Ex_sisr routines but i am still not able to understand wat's wrong in my previous code,bcoz it works gud in my last project.
i have designed a board for sim300 modem with pic18f97j60 controller,with tx(c6),rx(c7),rts(d0) and cts(d1) lines connected to modem,pin g1 and g2 connected to pc.
Using the INT_RDA an ...