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Evertop: E-ink IBM XT clone with 100+ hours of battery life

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Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#181
post #62

Earlier quoted context omitted.

Then search for Raspberry Pi laptop cases and go for the one that can hold your choice of eink display + driver?

It does seem a bit strange given the overall focus on power consumption and battery life. Surely emulation is a very heavy tax on the hardware? Imagine what it could do with software running natively.

Well, the creator chose to use a regular ESP32, which is Xtensa based, and is poorly suited for this type of application.

It's really weird anyways because the ESP32 fairly old nor as useful as something like the C6 which on paper could run Linux but without floating point.

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#182

This is running under emulation, but I wonder if the power savings would be even more (an order of magnitude?) if the hardware was "gate accurate" to the original but shrunken down to a modern CMOS process. I find it amusing that the keyboard has a Windows key. Does anyone recognise what laptop it was originally from? It can't be a Thinkpad since there's no pointing stick, and I seem to remember some early Dells havi…

Intel makes the quark which is like a 486dx that runs on a watch battery. There are a few models now, but I think that qualifies?

There is a spin off of Via that makes 386 or 486 clones still today...forget the name but you can find them out there.

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#183
post #102

Earlier quoted context omitted.

> Security is not a consideration for such devices, because of their very limited number. Nobody is going to crack into your internet-connected Amiga except maybe some of your friends, as a prank. This depends pretty heavily on your threat model. You're right that a device like this is exceedingly unlikely to get exploited by attackers casting a wide net against common vulnerabilities. But an attacker targeting you-i…

Even if there are a lot of exploits on my Amiga (I don't own one, but work with me...), my value is likely low enough that it wouldn't be worth the cost to hack just me. If I was (or become) a major figure politically, militarily, or rich (maybe my 401k is that large - if you can get at it) it would be worth attacking me, but otherwise there are just not enough Amiga owners out there. Also you can expect someone with…

Your entire comment is threat modeling, which is great! But it demonstrates my point: using an old, insecure thing is sometimes obscure enough to fly under the radar of one class of threats, but presents a juicy attack surface for another class of threats. And one's own personal risk for any given class of threats will vary depending on one's circumstances. So the parent comment's unqualified statement of, "security is not a consideration for such devices," isn't quite right.

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#184

Earlier quoted context omitted.

Intel makes the quark which is like a 486dx that runs on a watch battery. There are a few models now, but I think that qualifies?

There is a spin off of Via that makes 386 or 486 clones still today...forget the name but you can find them out there.

DM&P? I think their "Vortex86" range seems to be the modern take on "low-end x86 designed for embedded markets".

Wonder what happened to some of the others-- the ALI embedded 386SX seems to be suddenly popular in those "Pocket 386" laptops, but I'd expect there are warehouses full of old AMD Elan/NSC Geode style parts waiting to get tapped.

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#185
post #70

Earlier quoted context omitted.

It's probably https://www.good-display.com/product/440.html which is also 1mil refresh cycles and a fast refresh time of 1.5sec - around 185 hours of screen updates, so ~3 months of 5hrs a day typing or a few years of e-reader style usage. I can't really see a device like this getting used super heavily every day, so expecting it to still be usable from time to time for a few years seems reasonable to me.

For e-ink, does the refresh count include the entire screen or individual pixels?

I don't know about this display but I've tinkered a bit with Waveshare E-Ink, that has this disclaimer:

"For e-Paper displays that support partial refresh, please note that you cannot refresh them with the partial refresh mode all the time. After refreshing partially several times, you need to fully refresh EPD once. Otherwise, the display effect will be abnormal, which cannot be repaired!"

https://www.waveshare.com/wiki/1.54inch_e-Paper_Module_Manua...

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#187
post #22

Love it! Any idea how long the display can last? I've been playing around with e-paper (nothing as impressive as this!) dashboards. I use Waveshare displays that has a max of 1 million refresh cycles. The display you've used seems more capable. My own humble e-paper projects: https://www.asciimx.com/projects/e-reader/ https://www.asciimx.com/projects/etlas/

Hi, I'm Eric, Evertop's creator. The screen has a refresh rate of about 350ms, or almost 3 times per second. Of course the device is smart enough to not refresh the screen unless there's a change in displayed content, so it's not like it's actually always refreshing 3 times per second. I've been using the same screen for probably an average of 1-2 hours per day for a little over two years, and can see little or no difference in the clarity of the text and graphics as compared to a brand new screen.

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#188

Earlier quoted context omitted.

The unique thing about an IBM PC compatible like this is that it has an absolutely massive library of software that will continue to work and be "supported".

i.e. The first picture you see of the machine is running Microsoft Flight Simulator. The First. They knew this was the standard for compatibility. My question would be Jet by Sublogic, and ... most unfortunately Xenix x86. Which leads me to believe that... you need a very low power cMos CPU, to have that battery life. There are 12Mhz Harris cMos 286s but they are collector items, and the next step is 486slcs, which m…

It’s an ESP32. You can emulate any system you want.

Part of the point though is that emulating an original PC takes very little power. A 286 doesn’t get you much (who on earth wants to run a 286 OS)?

I could see a case for a 386/486 for running old DOS apps just so you have extra memory, but you could also simply port DOSBox-X to the ESP32 and do things that way.

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#189

Earlier quoted context omitted.

For e-ink, does the refresh count include the entire screen or individual pixels?

I don't know about this display but I've tinkered a bit with Waveshare E-Ink, that has this disclaimer: "For e-Paper displays that support partial refresh, please note that you cannot refresh them with the partial refresh mode all the time. After refreshing partially several times, you need to fully refresh EPD once. Otherwise, the display effect will be abnormal, which cannot be repaired!" https://www.waveshare.com/…

[deleted]

Re: Evertop: E-ink IBM XT clone with 100+ hours of battery life

#190
Goodisplay says "Although the refresh rate of monochrome e-paper displays is faster than that of color e-paper, we still recommend allowing at least a 180-second interval after completing a set of display updates. Frequent updates can negatively impact the lifespan of the ePaper."

https://www.good-display.com/news/80.html

So I guess playing Space Quest a lot will rapidly kill that screen.

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