Process of sequential elements...

<font color=#000066>architecture jkff1 of jkff is
begin
process(clk)</font>
begin
if clk='0'then
if(j=not k)then
q<=j;
elsif(j='0' and k='0')then
q<=q;
elsif(j='1' and k='1')then
q<=not q;
end if;
end if;
end process;
end jkff1;
entity xnor is
port(a,b:in bit;c:out bit);
end xnor;
architecture xnor1 of xnor is
begin
c<=not(a xor b);
end xnor1;