Minecraft wiki entry for Memory, associated text: Design C is a one block wide vertical version of A, except for using a non-inverted clock. It sets the output to D while the clock is ON (turning the torch off). This design can be repeated in parallel every other block, giving it a much smaller footprint, equal to the minimum spacing of parallel data lines. A clock signal can be distributed to all of them with a wire running perpendicularly under the data lines, allowing multiple flip-flops to share a single edge-trigger if desired. The output Q̅ is most easily accessed in the reverse direction, toward the source of input. As in design A, the un-isolated Q and Q̅ wires can do double duty as R and S inputs. Q can be inverted or repeated to isolate the latch's Set line.