General > General Technical Chat
Why aren't computers designed to handle power failure?
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bd139:
Oh yes that's a complete shit show that is. Completely agree. And don't get me started on x86 as an architecture  :-DD

Edit: incidentally http://danluu.com/cpu-bugs/. Ryzen here. Slightly less buggy  :-DD
filssavi:

--- Quote from: NiHaoMike on June 12, 2020, 12:56:28 pm ---Just make it an ATX PSU with a standardized connection for a battery and USB for monitoring. In fact, with many modern ATX PSUs internally generating 5V and 3.3V from 12V using DC/DC converters and a 3S pack being just perfect for supplying 12V directly, it might not take much hacking to convert a PSU to do that.

What I would like to see is an additional signal that instantly drops the CPU speed to minimum to allow using a smaller battery, I have DIYed one fairly easily by adding a circuit to a motherboard that pulls down the PROCHOT line.

--- End quote ---

If you want a one off prototype/ small production run I am shute you can hack together something that sort of works with a battery, am arduino and not much more

That said the question was why is not a standard feature of all PCs. In that case with the volumes we are talking about, coupled to how anal the enthusiast market is (just waiting for the smallest technicality to raise a major shitstorm against anyone) you need something much better engineered and integrated.

The hard part is the software not the hardware, and not from a CS perspective, it is the software engineering that kills you, making sure everything is compatible, right drivers, client software must not be too obstructive, backward compatibility, etc
ogden:

--- Quote from: Raj on June 12, 2020, 07:28:40 am ---This would be most efficient if the battery were to directly interact with the motherboard.
Why don't we do this?

--- End quote ---
We indeed do this. In every laptop and tablet/handheld computer. Some time ago Google did that with server as well - gel battery plugged directly into motherboard. https://www.cnet.com/news/google-uncloaks-once-secret-server-10209580/
bd139:

--- Quote from: filssavi on June 12, 2020, 02:57:55 pm ---
--- Quote from: NiHaoMike on June 12, 2020, 12:56:28 pm ---Just make it an ATX PSU with a standardized connection for a battery and USB for monitoring. In fact, with many modern ATX PSUs internally generating 5V and 3.3V from 12V using DC/DC converters and a 3S pack being just perfect for supplying 12V directly, it might not take much hacking to convert a PSU to do that.

What I would like to see is an additional signal that instantly drops the CPU speed to minimum to allow using a smaller battery, I have DIYed one fairly easily by adding a circuit to a motherboard that pulls down the PROCHOT line.

--- End quote ---

If you want a one off prototype/ small production run I am shute you can hack together something that sort of works with a battery, am arduino and not much more

That said the question was why is not a standard feature of all PCs. In that case with the volumes we are talking about, coupled to how anal the enthusiast market is (just waiting for the smallest technicality to raise a major shitstorm against anyone) you need something much better engineered and integrated.

The hard part is the software not the hardware, and not from a CS perspective, it is the software engineering that kills you, making sure everything is compatible, right drivers, client software must not be too obstructive, backward compatibility, etc

--- End quote ---

BTW you can use "picopsu" boards to do this and then use a standard BMC board as the supply for it.

https://www.mini-itx.com/store/?c=10

Don't expect to hang a Ryzen 9 off it  :-DD
pepelevamp:

--- Quote from: bd139 on June 12, 2020, 03:02:59 pm ---BTW you can use "picopsu" boards to do this and then use a standard BMC board as the supply for it.
https://www.mini-itx.com/store/?c=10

Don't expect to hang a Ryzen 9 off it  :-DD

--- End quote ---
thanks a bunch now i have lost the rest of my life to this rabbit hole. what a fantastic idea. I have long wished that all the devices in my house simply ran off DC. you could have a stack of 18650s in there with a BMS and have your own sweet sensual UPS for a fraction of the cost of those horrible big nasty UPSes that just include those disgusting alternators with their jaggedy excuses for sine waves.
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