If the interrupt vector address of Serial Port 0 is 0x3B, how to connect the response with uv3 serial window.
It has nothing to do with interrupt vectors.
www.keil.com/.../uv3_sm_uartcommunication.htm
You use the ASSIGN command, where the inreg and outreg parameters specify the port... http://www.keil.com/support/man/docs/uv3/uv3_cm_assign.htm