&quot;I&#x27;ll give it a shot :)&quot;<p>I admire your initiative. :)<p>&quot;logic cells: easy, by universality of NAND.&quot;<p>Got me dead to rights there. Seems to be able to do anything boolean.<p>&quot;a massive (or not so much) array of flip flops&quot;<p><a href="http:&#x2F;&#x2F;www.learningaboutelectronics.com&#x2F;Articles&#x2F;D-flip-flop-circuit-with-NAND-gates.php" rel="nofollow">http:&#x2F;&#x2F;www.learningaboutelectronics.com&#x2F;Articles&#x2F;D-flip-flop...</a><p>Close but still need the resistors.<p>&quot;May I suggest a&quot;<p>That&#x27;s not a NAND gate but it&#x27;s pretty neat. Thanks for that link. Especially as when you posted it I was, in search of esoteric constructions, just discovering and looking at these diode-based works:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Diode_logic" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Diode_logic</a><p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;D-17B" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;D-17B</a><p>Note: D-17B is pretty wild in design, appearance, tech, and reliability all at once. Makes me want to try it on 0.35 micron in voter part of lockstep or TMR circuits. :)<p>&quot;having Vcc and ground available is an implicit requirement of having a functional NAND gate, and IO could just be some wires mirroring a memory location.&quot;<p>Now you&#x27;re stretching. NAND doing signal conditioning, power regulation, or 2-3 component differential equations is hard to believe. I&#x27;m thinking it fails here. I admit I cheated by including an analog requirement but it exists in ever real-world computer (esp SoC) so it seemed fair-ish.<p>Overall, a high-scoring counterpoint that taught me some useful stuff about NAND gates and old-school ROM. I&#x27;m researching both reductionism and old-school techniques in anti-subversion hardware. So, quite relevant. Thanks!