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| 14:35 | | * ToxicFrog festoons catadroid` with sexprs |
| 14:37 | | * abudhabi staples catadroid` to the channel wall. |
| 14:39 | < ToxicFrog> | I keep saying she should set up a bouncer~ |
| 14:39 | < abudhabi> | Shell account + screen + irssi FTW. |
| 14:46 | < ToxicFrog> | Doesn't work so well from a phone. |
| 14:47 | < abudhabi> | True. Good thing I don't have a smartphone. |
| 14:48 | < abudhabi> | (I don't quite understand the appeal. For computer stuff, I have computers. For phone stuff, I have a dumbphone.) |
| 14:49 | < ToxicFrog> | It is often useful to be able to access IRC, or email, or a web browser, without needing to get a laptop out, wire it up to your phone so it can use the cellular data link, etc. |
| 14:49 | < ToxicFrog> | For those of us who have on-call duties, it's vital. |
| 14:50 | <@Tamber> | I think I've used my phone as a phone a grand total of twice now. :/ |
| 14:50 | < ToxicFrog> | A smartphone also completely replaces a PDA; if you use Google Calendar, for example, rather than a paper notebook, to manage your schedule, it's a lot easier to check your schedule on a phone or a watch than on a computer when you're on the move. |
| 14:51 | | * catadroid` bounces at ToxicFrog |
| 14:52 | < ToxicFrog> | Yeah, my phone usage by total time spent is probably something like: gtalk/hangouts > calendar > quickly looking things up online > irc > taking photographs > SMS > voice calls |
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| 18:38 | < kourbou_> | My friend asked: "I was thinking, why doesn't anyone make a BASE64 operating system instead of Binary?" I'm thinking it's because CPU's compute 1s and 0s thorugh logic gate because a cable only has an on and off state anyways. But I wanted to check that what I wanted to answer is correct, right? |
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| 18:42 | <&McMartin> | kourbou|phone: It's not strictly true, but it's close enough to true to be a decent answer to the question. |
| 18:43 | <&McMartin> | Cables can of course carry many more than 2 signals. |
| 18:43 | < kourbou> | We're not talking quantum computing right? |
| 18:43 | <&McMartin> | No. We're talking about your headphones' cable, for instance |
| 18:43 | <&McMartin> | analog: It's totally a thing, it carries lots more than two possible values |
| 18:43 | < kourbou> | Analog? |
| 18:43 | < kourbou> | Ah yes |
| 18:43 | < kourbou> | But the cable flashes tho. |
| 18:44 | < kourbou> | I mean it rapidly switches on and off? |
| 18:44 | <&McMartin> | No |
| 18:44 | < kourbou> | Or diffrent voltages? |
| 18:44 | <&McMartin> | The voltage varies in a way that looks a lot (if captured by an voltmeter) like the variance in air pressure a microphone would see |
| 18:44 | <&McMartin> | Because that's how analog mics and speakers work |
| 18:44 | <@Namegduf> | Even with digital, voltage variation enables you to have lots more than two discrete states. |
| 18:44 | <&McMartin> | Right |
| 18:45 | <&McMartin> | But you use 2 because it's both good enough and it's easy to optimize |
| 18:45 | < kourbou> | Oh right. |
| 18:45 | < kourbou> | :3 |
| 18:45 | <&McMartin> | You can basically design transistors to slam to max or min very easily - and that's what you use for digital |
| 18:45 | <&McMartin> | Or you can treat the max/min as the limits of performance you want to stay between - and that's what you use for amplifiers |
| 18:46 | <&McMartin> | Hitting the "1" state on a speaker or mic is "blowing out the speaker" getting the clipping effects aka Horrible Robot Voice |
| 18:46 | < kourbou> | Yes Because you're not getting a square wave. |
| 18:47 | < kourbou> | Right? When you speak in a mic that's noise? |
| 18:48 | <&McMartin> | That's blown out |
| 18:48 | <&McMartin> | Well |
| 18:48 | <&McMartin> | When you blow it out you get what looks like a square wave superimposed on the real data |
| 18:49 | <&McMartin> | That's where the "robot" comes in instead of merely "distorted", imo, but I haven't done the psychoacoustics >_> |
| 18:49 | < kourbou> | Oki. |
| 18:49 | < kourbou> | And CPU logic gates could really handle analog data? |
| 18:50 | < kourbou> | That sounds awfully slow. |
| 18:50 | <&McMartin> | You have to start playing language games |
| 18:50 | <&McMartin> | Is an analog multiplier an AND gate? |
| 18:50 | <&McMartin> | etc |
| 18:50 | <&McMartin> | CPU logic gates are built using the transistors that normally operate at their full max or min voltage, and deviation from that is misbehavior |
| 18:51 | <&McMartin> | so they will go into "metastable" states where the other logic sees a rapid flip between 0 and 1, far faster than any clock circuit, if you mess with them enough |
| 18:51 | <&McMartin> | Which brings us to the other bit here, which is that logic gates/input pins really have three states in microcomputers and similar systems. |
| 18:51 | <&McMartin> | There's 0, 1, and "high impedance" |
| 18:52 | <&McMartin> | You don't want more than one device trying to set a value on the data bus at any given time. It produces (sometimes predictable, not always) garbage, and depending on the electrical properties of the devices, it can be harmful to the electronics |
| 18:52 | <&McMartin> | So every device that isn't talking at the time is in a mode where the resistance (technically, impediance) of their silicon is very high. |
| 18:53 | <&McMartin> | It's kind of like being unplugged, but they can "plug themselves in" and "unplug" themselves purely via electrical signals. |
| 18:53 | <&McMartin> | I only know it at that level (the one where you're looking at a computer and "the memory" is a single box with some lines connecting it to "the data bus") |
| 18:53 | <&McMartin> | But that property is one of the things transistors can do and you can trace the ability to do that all the way down to, probably, the silicon chemistry level. |
| 18:54 | <&McMartin> | I'm not good enough to do that though :) |
| 18:55 | < ToxicFrog> | I was very briefly in my last year of undergrad when I was taking VLSI Design, but not anymore. |
| 18:56 | <&McMartin> | If I ever was, it was right after I took circuit analysis |
| 18:56 | <&McMartin> | But in practice, I was real bad at circuit analysis >_> |
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| 18:57 | < ToxicFrog> | Heh |
| 18:58 | < ToxicFrog> | Yeah, much like Analog, I barely struggled through it |
| 18:58 | | Marijn [Marijn@Nightstar-ajg66t.dynamic.caiway.nl] has joined #code |
| 18:58 | < Marijn> | Hi |
| 18:58 | < Marijn> | Did it work? |
| 18:58 | < kourbou> | Yes.? |
| 18:58 | < kourbou> | >.> |
| 18:58 | < ToxicFrog> | It was a chip design course, but focusing on the design of individual gates and how you laid them out on the actual silicon, unlike earlier courses where you just did the high-level design and let the place & route software handle layout for you. |
| 18:58 | < Marijn> | >.> |
| 18:58 | < Marijn> | Too complex. |
| 18:58 | < Marijn> | Quits. |
| 18:59 | < ToxicFrog> | Which meant you had to actually worry about the analog behaviour of individual transitors rather than slapping down logic gates as the muse directs. |
| 18:59 | < ToxicFrog> | Welcome, Marijn. |
| 19:00 | < kourbou> | Yes, he's my buddy. |
| 19:00 | < kourbou> | I'm sorry if he troubles you guys. |
| 19:00 | < Marijn> | Thanks. |
| 19:00 | < Marijn> | >.> |
| 19:00 | < ToxicFrog> | (my main takeaway from Analog was a much more fundamental understanding of Ohm's Law and a deep-seated belief that alternating current is the work of Satan) |
| 19:00 | < kourbou> | :P |
| 19:01 | <&McMartin> | The First Reformed Church of Tesla has formed an angry mob with sparking pitchforks outside your door |
| 19:01 | | kourbou is now known as kourbou|foodz |
| 19:06 | < ToxicFrog> | My polyphase intrinsic electric field (known to non-engineers as "the soul") is already quite safe, thank you. |
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| 19:37 | < Marijn> | Welcome back, Kouby. |
| 19:37 | < kourbou> | :3 |
| 19:57 | <&McMartin> | Ah yes, I found myself unable to recall the complete quote. |
| 20:19 | < kourbou> | Wtf is this: http://bepo.fr/. Someone thought it was funny to change the french AZERTY keymap (which is fine) to BÃPOÃ!VDL. Like did he faceplant in the keyboard to come up with that? |
| 20:20 | < ToxicFrog> | (I've actually been getting back in touch with my analog side, spent the weekend remembering how diodes work) |
| 20:20 | < ToxicFrog> | (and accidentally blowing the fuse in my analog multimeter) |
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| --- Log closed Tue May 05 00:00:43 2015 |