Can't Simulate Buffer port in ModelSim

Hi,

with "does not give any value" I assume you mean 'U'? If so, it's because you never initialize "out2" to any value.

Also, I agree with Tricky, you need a testbench that provides a clock. If you don't know about testbenches, Google has plenty of examples, e.g. here: https://www.doulos.com/knowhow/vhdl_designers_guide/test_benches_part_1/ (https://www.doulos.com/knowhow/vhdl_designers_guide/test_benches_part_1/).

Best regards,

GooGooCluster