$3.$ Do Exercise $19$ in Chapter $7($Input$/$Output and Storage Systems$)$ of Null and Lobur

We pointed out that I$/$O buses do not need separate address lines. Construct a timing diagram similar to Figure $7\mathrm{.}11$ that describes the handshake between an I$/$O controller and a disk controller for a write operation. $($Hint: You will need to add a control signal.$)$