104: credit_in <= '0'; -- Is this actually credit_out from the router module ?
111: credit_in <= '1'; -- Is this actually credit_out from the router module ?
126: xor_all <= '0'; -- Is this correct ? This means parity is zero. Or does it mean we don't care about parity in this case ?
175: -- Is this the place where we do the saving for packet drop ?
242: state_in <= state_out; -- We can also write (state_in <= Body_flit) ?? As the state is not changed.
285: -- what is this case ??
286: -- we should not be here ??
320: -- flit is dropped ?? Previous values of FIFO slots are re-written
334: -- previous values of FIFO slots are re-written (flit is dropped ??)
