I really wish he&#x27;d document even the barest scraps of the CPU architecture. Is it microcoded? There&#x27;s 7400 series like 7402 or 7473, and there&#x27;s 7400 series like 74154, 74181, etc.<p>&quot;hey kid, I built one of these too, back in the day, and it was damn hard and time consuming, but oh a labor of love. I had no internet, nor any schooling. I read articles in Popular Electronics and I read the TI 7400 series databook. Then I reread them. Then I reread them.&quot; Yes, in fact it was snowing, uphill, and I in fact had no shoes!