Talk:2497: Logic Gates

Explain xkcd: It's 'cause you're dumb.
Jump to: navigation, search

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. 00:08, 3 August 2021 (UTC)

(Also, surprised there was no direct "GONDOR" reference. Or maybe that's because it was too obvious?) 00:12, 3 August 2021 (UTC)

I was also missing a "GONDOR" reference, and all the X's also made me think XEHANORT. 03:49, 3 August 2021 (UTC)
Never mind GONDOR, surely "The black GATES of MORDOR" should feature heavily? 11:45, 6 August 2021 (UTC)

...So, who's ready to draw up some truth tables? 01:22, 3 August 2021 (UTC)

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... BunsenH (talk) 04:11, 3 August 2021 (UTC)

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 op-amp. Given the subtraction that an op-amp does, the xand gort's truth table probably resembles that of the "implies" operator. Tepples (talk) 04:23, 3 August 2021 (UTC)

the "NORG XORT" is not equivalent to an XOR, as the symbol is round on the right. -- 06:39, 3 August 2021 (UTC)

Right, "NORG XORT" would be a XNAND with inverted inputs, though I don't know what the logic table from a XAND or XNAND gate would look like. If De Morgan applies to XAND/XOR the same way as with AND/OR, would a "NORG XORT" then be equivalent to a XOR ? 15:12, 3 August 2021 (UTC)

I think it is specifically a hybrid between XOR and NAND. The left edge is curved like OR, and the right edge curved like AND. I did spend some time thinking about XAND, though. One of my ideas was a >2-input AND that is only true if exactly 2 inputs are true. I wonder what qubit gates are like. 16:16, 3 August 2021 (UTC)
Logic Gates

It seems to me that their ought to be 16 possible logic gates. Although some would ignore one or both inputs. Algr (talk) 07:18, 3 August 2021 (UTC)

Yes. The 74181 4-bit arithmetic logic chip implements all 16 possible binary logic operations. See 07:34, 3 August 2021 (UTC)
It doesn't say the names of the various gates. On my list I made up a few, like "Only B" that only returns true if B is true and A isn't. Are their real names for this? Algr (talk) 18:57, 3 August 2021 (UTC)
I could suggest "Unless" (as in 'B unless A', or maybe to counterpart 'A unless B' with standard order of operands, 'A disallows B'). Though the partially composite construct '!A && B' would be easier to grasp by those already handling logic statements, I think. 19:24, 3 August 2021 (UTC) -- 23:02, 3 August 2021 (UTC)
So "Only B" is called "Converse nonimplication"?! Maybe I'm the only logical person. Algr (talk) 06:30, 4 August 2021 (UTC)
As Randall drew gates with two outputs, these would have 256 (16^2) possible functions 15:15, 3 August 2021 (UTC)
That couldn't logically be anything but two logic gates sharing the same input. Algr (talk)
When both inputs to the norxondor gorgonax are 0, the output is 2. 21:27, 18 November 2021 (UTC)

there should be a category of comics where it starts out like a normal list and gets weirder and weirder like Trig Identities 18:53, 3 August 2021 (UTC)Bumpf

What, no IMPLIES gate? I actually used this once to implement a NOT operation in a database see search. Joem5636 (talk) 11:00, 4 August 2021 (UTC)

Yeah, neither IMPLY nor NIMPLY, the only asymmetric gates where the inputs can't be arbitrarily swapped. IMPLY: 0,0->1; 0,1->1; 1,0->0, 1,1->1; NIMPLY 0,0->0; 0,1->0; 1,0->1, 1,1->0 15:25, 16 August 2021 (UTC)

It appears to me that the new gate names are just taken from the letters of the original gate names: NAND, NOR, XOR,and GATE. They're just stuck together in ways that tickled the creator's fancy. OK, tha's already been noted. 11:11, 4 August 2021 (UTC) 11:13, 4 August 2021 (UTC)

Unlike professional devs, I don't have a multiocular O key on my keyboard, so I verbosely write out __norxondor_gorgonax_bitwise everywhere in my code when writing kernel modules :-/ 22:57, 4 August 2021 (UTC)

You need a better keyboard. :-) BunsenH (talk) 23:35, 4 August 2021 (UTC)

Is it just me, or did the first four gates sound Seussy to someone else? "AND gate, OR gate, NOT gate, NOR gate." GreatWyrmGold (talk) 04:10, 5 August 2021 (UTC)

there should be a category of comics that start out with obvious/known things and get weirder and weirder like this. the only other one i can think off the top of my head is 2070: Trig Identities though 01:39, 13 August 2021 (UTC)Bumpf

NORG might be a reference to the boss of the same name in Final Fantasy 8 -- 10:22, 21 August 2021 (UTC)

“Stream Norxondor Gorgonax music”?[edit]

Predates comic. Stream Norxondor Gorgonax music

i don't think it predates the comic, soundcloud allows users to change their displayed name freely; only the profile name (i.e. d3x here) is fixed. -- 17:10, 19 November 2021 (UTC)