https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&feedformat=atom&user=162.158.94.253explain xkcd - User contributions [en]2026-04-17T05:22:30ZUser contributionsMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=Talk:2497:_Logic_Gates&diff=215943Talk:2497: Logic Gates2021-08-03T07:34:49Z<p>162.158.94.253: 74181</p>
<hr />
<div><!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--><br />
As someone has just Transcripted basically almost all the fine detail I had planned to entable in the Explanation, I shall not now create repetition. Though I had a little more description to the NORXONDOR GOGONAX, in particular, to reference bidirectional (antiparallel) diode pairings (e.g. an LED assembly that glows a different hue depending upon the applied current bias) as probable inspiration, and that latched Flip-Flops surely inspired some part of the Frankensteinian gate-types, too. [[Special:Contributions/141.101.99.119|141.101.99.119]] 00:08, 3 August 2021 (UTC)<br />
<br />
(Also, surprised there was no direct "GONDOR" reference. Or maybe that's because it was ''too'' obvious?) [[Special:Contributions/141.101.99.211|141.101.99.211]] 00:12, 3 August 2021 (UTC)<br />
<br />
: I was also missing a "GONDOR" reference, and all the X's also made me think XEHANORT. [[Special:Contributions/172.70.126.174|172.70.126.174]] 03:49, 3 August 2021 (UTC)<br />
<br />
...So, who's ready to draw up some truth tables? [[Special:Contributions/172.70.126.211|172.70.126.211]] 01:22, 3 August 2021 (UTC)<br />
<br />
I can't get the lines in the bitwise-operation example to align properly; the first one is indented a tad. Can someone please fix that? Thanks... [[User:BunsenH|BunsenH]] ([[User talk:BunsenH|talk]]) 04:11, 3 August 2021 (UTC)<br />
<br />
The symbol for norx gate (1-input OR, two outputs) I'd read as a noninverting buffer to increase another gate's usable fan-out. Xand gort resembles the symbol for an [[wikipedia:Operational amplifier|op-amp]]. Given the subtraction that an op-amp does, the xand gort's truth table probably resembles that of the [[wikipedia:Material conditional|"implies" operator]]. [[User:Tepples|Tepples]] ([[User talk:Tepples|talk]]) 04:23, 3 August 2021 (UTC)<br />
<br />
the "NORG XORT" is not equivalent to an XOR, as the symbol is round on the right. --[[Special:Contributions/141.101.69.186|141.101.69.186]] 06:39, 3 August 2021 (UTC)<br />
<br />
===Logic Gates ===<br />
: It seems to me that their ought to be 16 possible logic gates. Although some would ignore one or both inputs. [[User:Algr|Algr]] ([[User talk:Algr|talk]]) 07:18, 3 August 2021 (UTC)<br />
<br />
::Yes. The 74181 4-bit arithmetic logic chip implements all 16 possible binary operations. See https://en.m.wikipedia.org/wiki/74181 [[Special:Contributions/162.158.94.253|162.158.94.253]] 07:34, 3 August 2021 (UTC)</div>162.158.94.253