Hi to all, I am having hard time to make my Xilinx demo board working and I am new to VHDL. I was wondering if some one can check my test code. All I am trying to do is to turn 4 LEDs on and it doesn't work any help? library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity test is port( LED_0,LED_1,LED_2,LED_3: OUT STD_LOGIC); end test; architecture behavior of test is begin LED_0 <= '0'; LED_1 <= '0'; LED_2 <= '0'; LED_3 <= '0'; end behavior; thanks in advance. Andre -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist