egg|nomz|egg changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer.
<awang>
bofh: I used something similar on macos
<awang>
killall -9 chrome
<awang>
No dice :(
<bofh>
huh.
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<egg|zzz|egg>
!wpn bofh
* Qboid
gives bofh a mangled teledildonics
<bofh>
no thanks
<bofh>
!wpn egg|zzz|egg
* Qboid
gives egg|zzz|egg a von Neumann projective ellipse
<bofh>
hey give that back, I need it for this convex optimization problem!
* egg|zzz|egg
stares at ISO 8601
<egg|zzz|egg>
there's a galaxybrain meme to be made here
<egg|zzz|egg>
also I am endlessly amused that [,] is the preferred decimal sign when using fractional hours, minutes, or seconds
<bofh>
Yeah I'm a bit annoyed at that.
<bofh>
Fuck any use of [,] as a decimal point.
<egg|zzz|egg>
what?
<egg|zzz|egg>
it's a perfectly good decimal mark
<egg|zzz|egg>
(using either [.] or [,] as a grouping mark is sinful, of course)
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<egg|zzz|egg>
!wpn -add:wpn comma
<Qboid>
egg|zzz|egg: Weapon already added!
<egg|zzz|egg>
!wpn bofh
* Qboid
gives bofh a boy/1N4148 hybrid
<iximeow>
!wpn -add:wpn interrobang
<Qboid>
iximeow: Weapon added!
<iximeow>
!wpn egg
* Qboid
gives egg a reduced invariant/emulsifier hybrid
<egg|zzz|egg>
bofh: have you looked at ftp://www.cs.toronto.edu/na/reports/DNA.pdf it's neat
<egg|zzz|egg>
(also, ftp link to a pdf, it's only missing a ~ in the URL for maximal kspacademia :-p)
<egg|zzz|egg>
bofh: conteggst for it being in your interests?
<egg|zzz|egg>
(besides one of the author being in CA)
<egg|zzz|egg>
(okay the other is in CA, too, but different namespace)
<bofh>
egg|zzz|egg: I'm currently going over my old dynamical systems notes :P
<egg|zzz|egg>
also why am I not sleeping
<bofh>
and like, one of the interesting unanswered questions from that course is indeed how do we handle error blowup in numerical approximations to them.
<UmbralRaptop>
!choose the computer|SPORTS PUDDING TIME
<Qboid>
UmbralRaptop: Your options are: the computer, SPORTS PUDDING TIME. My choice: the computer
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<egg|laptop|egg>
bofh: nah there's #RO too :D
<egg|laptop|egg>
!wpn UmbralRaptop
* Qboid
gives UmbralRaptop a spectral fire
<egg|laptop|egg>
!wpn bofh
* Qboid
gives bofh a Shannon demangler
<SilverFox>
Ellied, you're all up in that raspi stuff right?
* UmbralRaptop
calculates the partition function of the fire.
<awang>
!u ꙮ
<Qboid>
U+A66E CYRILLIC LETTER MULTIOCULAR O (ꙮ)
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<Ellied>
SilverFox: aye
<SilverFox>
so I have a theory
<SilverFox>
raspi ds emulator with two screens
<SilverFox>
how do?
<SilverFox>
last I checked you can't reall dual-screen a raspi
<Ellied>
you lose me when you venture into game emulators, I don't know the first thing about those
<iximeow>
is a raspi sufficiently computey for a ds emulator?
<Ellied>
I'd expect your best bet for dual screen would be to find an HDMI switch that will let you split a wide feed between two physical displays, but the RPi's GPU only supports a maximum output resolution of 1920x1080, so you'd have to make do with that
<Ellied>
that is, 1920x1080 split between two monitors
<Ellied>
If that's not good enough, you can try to read into using the DSI bus, I have no idea what the maximum resolution is there but it might be more
<Ellied>
nevermind, it's the same as HDMI and the firmware blob for it is completely proprietary, that's a non-starter
<Ellied>
so yeah I think the easy answer to "how do I connect two 1080p displays to a raspberry pi" is "you can't"
<Ellied>
I suppose you might be able to do something with time multiplexing where you divide the framerate instead of resolution, not sure if HDMI supports that
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<Ellied>
the other obvious thing to try is just to use two Pis
<Ellied>
although that probably makes the problem worse instead of better, because there's no good way to get the bandwidth between two pis that you'd need to just send the stream straight across
<Ellied>
what resolution/framerate are you hoping for, anyway?
<Ellied>
ohhhh, 'ds emulator' means Nintendo DS, duh
<Ellied>
that explains the two screens
<Ellied>
okay so you don't need 1080p then lol
<Ellied>
but you're probably hoping for a handheld
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<SilverFox>
the nintento ds didnt have a 1080p display
<SilverFox>
so maybe the splitting might work
<SilverFox>
im quite sure the bottom screen is like 360 maybe 480p, and the top one probably is 480p as well, doubt it's 720
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<kmath>
<MSFarhadinia> گشت و گذار گربه پالاس در هوای برفی در خراسان ⏎ ⏎ A magnificent Pallas's cat enjoy snowy day patrolling in NE Iran… https://t.co/pRQIwGwKdl
<Ellied>
SilverFox: You might be able to do that with SPI displays, like the Adafruit PiTFT. The Adafruit ones are overpriced and shit, but they do at least show that SPI displays do work and require minimal driver electronics. HDMI for small devices is incredibly frustrating because there's always a huge driver board to convert the HDMI signal to LVDS or whatever
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<Ellied>
HDMI is only necessary when you're driving a large high-density display with a long (read: between separate machines) cable
<Ellied>
even DSI requires a surprising amount of extra stuff, too bad we couldn't just have an LVDS connector on the Pi, lol broadcom I guess
<Ellied>
anyway, the Raspberry Pi SPI bus can run at 125 MHz, so that's more than enough to run two 480x320 displays at 60 Hz
<Ellied>
it's single-ended and not differential, so there might be some issues with EMI and shit if you run the tracks any real distance; might be worth looking into some kind of differential line driver
<Ellied>
but the main problem with this approach I guess is that it's harder to buy the hardware you need prebuilt and even though it's a lot simpler than HDMI it's still pretty involved
<Ellied>
computer displays are complicated
<Ellied>
otoh, if you do drop 80 bucks or whatever on two Adafruit displays, a lot of work is done for you. I think they still have a working kernel module for them, including touch support.
<SilverFox>
only need touch on one
<Ellied>
right
<Ellied>
that doesn't change much since touch data is sent over the same interface as the picture data
<Ellied>
the most technically simple way of having two displays is probably just daisy-chaining them in hardware and then convincing the driver that it's operating a single double-height display, but I have no idea if the necessary pins exist on the Adafruit board or if they're in any way accessible
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<Ellied>
I don't think the display uses more than one peripheral-select pin, and the Pi has two of those, so theoretically you could have one display on each one
<Ellied>
But that does require running three data lines carrying signals in at least the tens of megahertz a good few centimeters from one side of the device to the other
<Ellied>
I guess the displays could be at opposite orientations so that both have their SPI buses in close to the same place, nvm
<Ellied>
I don't really have that good a sense of how far you can expect to run 125-MHz pcb traces without differential signalling honestly
<Ellied>
clearly you can manage it over like 3 or 4 cm without doing anything dumb because they managed it for the PiTFT
<oeuf>
!wpn whitequark
* Qboid
gives whitequark a panzer walrus
oeuf is now known as egg
<Ellied>
the hardest part with the PiTFT approach is probably figuring out how to modify the kernel module to let you control two displays
<Ellied>
I'm sure the source code is out there, but I have no experience at all with Linux kernel-level programming
<kmath>
<marcan42> It's January and we already have the best research paper of the year. ⏎ ⏎ Analysis and Qualitative Effects of Large Br… https://t.co/iru0WgT6AN
<SnoopJeDi>
err, title of the paper is "Analysis and Qualitative Effects of Large Breasts on Aerodynamic Performance and Wake of a “Miss Kobayashi’s Dragon Maid” Character"
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<bofh>
SnoopJeDi: ROFL. clearly you should. :P
<bofh>
Also gah, that article is *so* bad.
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<SnoopJeDi>
I erred on the side of irreverance/"fuck it the profs don't read the emails anyway"
<SnoopJeDi>
ALTHOUGH there is one prof who does often at least look at the link I include, and has occasionally printed out a hardcopy of the paper that I sent out to...give to me?
<SnoopJeDi>
I'M VERY PERPLEXED BY HIM AS A HUMAN
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<bofh>
SnoopJeDi: huh, that's odd. I guess at the least it seems he's interested as a result?
<SnoopJeDi>
yea it's kind of touching in a "but y tho" way
<SnoopJeDi>
same guy wrote a middling Physics II book, a copy of which lives in our favorite dive bar because he wrote 90% of the goddamned thing there
<kmath>
<askForCharon> @FioraAeterna I'm missing some key context (or I'm just dense) so I've decided to assume that this is like all the… https://t.co/w5L5eONGLb
<kmath>
<✔NASAJuno> If I have seen further it is by standing on the shoulders of Giants. https://t.co/IvIlwKx5lg
<SnoopJeDi>
Learning that full quote has ruined it for me :/
<SnoopJeDi>
or I guess the context that surrounds the quote in the original text? whatever, Newton was a dick is what I'm getting at
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<SnoopJeDi>
still, <3 Juno
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<bofh>
SnoopJeDi: I don't know if dick so much as a bit of a jerk, but yeah.
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<SnoopJeDi>
tbf most of what I "know" about his offputting nature is heresay/apocryphal, but seems like there's too much volume for it to be untrue at the core
<SnoopJeDi>
bofh, Juno (the goddess) got a shoutout in the speech I gave at my sister's wedding reception last fall :D
<kmath>
<Astro_Wright> Correction: Tabby's big paper showing the dips are due to dust was published in Astrophysical Journal Letters. "Sol… https://t.co/sq27n3n56B