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OT: Can CMOS battery on PC motherboard be hot-swapped?

Started by Joerg February 24, 2013
On Sat, 02 Mar 2013 17:42:33 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

> >> >>Ok, I just bought a new set of ink roller pens so at least I wouldn't >>run out of ink :-) > >I just bought some T\u\l (that's an over-bar :) medium needlepoint >pens. I've been having problems with the usual rollerball offerings >going all the way thru the cheap-ass paper masquerading as "green", >and bleeding such that readability goes to hell. So far the T\u\l >pens seem quite good. > >Do the world a favor... locate a greenie and burn his ass to the >ground >:-} > =09 > ...Jim Thompson
The way to really get the point across to the is to force them to use = only the green products that are seriously inferior. ?-)
On Sat, 02 Mar 2013 09:06:15 -0800, Joerg <invalid@invalid.invalid> =
wrote:

>josephkk wrote: >> On Mon, 25 Feb 2013 09:54:28 -0800, Joerg <invalid@invalid.invalid> =
wrote:
>>=20 >>> Jeff Liebermann wrote: >>>> On Sun, 24 Feb 2013 15:42:39 -0800, Joerg <invalid@invalid.invalid> >>>> wrote: >>>> >>>>> Well, it's already done. So not I am wondering about the laptops. >>>>> They've got to have such batteries as well. Maybe time to check =
those out.
>>>> Laptops do not have button cell holders. They have wire leads spot >>>> welded or soldered to the button battery, a short pair of wires, and=
a
>>>> tiny connector. The battery is insulated in shrink tube. The =
ritual
>>>> is the same if you want to preserve the settings. Leave the power >>>> applied to the laptop and the laptop running. Unplug the old =
battery
>>>> and quickly insert the new battery. Most such batteries are easily >>>> accessible through a door on the bottom of the laptop, although =
there
>>>> are a few abominations where the manufacturer elected to hide the >>>> battery in difficult to find location. >>>> >>> Why does the change have to be quick? Isn't the circuit powered as =
long
>>> as the laptop is? Because then one could solder in a new battery and >>> re-use the connector instead of shelling out lots of dough for a >>> specialty battery plus shipping charges. >>> >>> Hey, it's nice, this morning the PC showed the correct time again :-) >>> >>> What I really don't understand why in this day and age they don't =
write
>>> the settings into flash. I mean, we even successfully do that on =
totally
>>> cheapo uC design. >>=20 >> I kinda hate be snotty here but, since when is time a constant value? =
The
>> battery is to keep the clock running. Replacement cycles should be >> similar to most watch batteries. >>=20 > >I meant all the other settings. Think about it a little more: Why does >the handbook insist you copy everything in the setup before swapping the >battery? They would surely not say that if all you'd lose is date and >time (which nowadays cen even be auto-updated from the web).
I'll check my manuals, but it is more difficult to make static ram that needs battery than a bit of flash. Look at the common PICs, AVRs, and such; very many have flash, none have static ram requiring battery. ?-) =20
On 2013-03-03, SoothSayer <SaySooth@TheMonastery.org> wrote:
> On 3 Mar 2013 04:20:56 GMT, Jasen Betts <jasen@xnet.co.nz> wrote: > >>On 2013-03-02, josephkk <joseph_barrett@sbcglobal.net> wrote: >> >>>> >>>>I'm currently within 50ms of UTC/ >>>> >>>> ...Jim Thompson >>> >>> You do not need an addon since Win2000/XP they do ntp natively, should be >>> within 1 ms or better. >> >>speaking NTP is half of the solution, clock scaling is the other half. >>without clock scaling you get serious jitter each time the clock is >>resynchronised. > > Your Internet connection has latencies and jitter as well. > > see what the FCC says about your hooks. > > See who they say the best is. > > http://www.broadband.gov/qualitytest/ookla.htm
they say I've got 4ms jitter not bad for the other side of the world,
> I get 24 down and send 20 up, and have 36ms latency with 2ms jitter. > > Damn near T3. Not bad for $50 a month.
I pay about half that, for a slow DSL connection. to nz.pool.ntp.org I get ICMP pings between 34.7 and 35.8 ms (6 hops). and TCP pings in the same ballpark. OTOH to the national standard I get 5ms jitter I haven't bothered to optimise my NTP settings I'm still using the defaults. which is pick 4 servers at random from an international pool. -- &#9858;&#9859; 100% natural
SoothSayer <SaySooth@TheMonastery.org> writes:

> On Sat, 02 Mar 2013 17:14:10 -0700, Jim Thompson > <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Sat, 02 Mar 2013 16:09:27 -0800, Joerg <invalid@invalid.invalid> >>wrote: >> >>>krw@attt.bizz wrote: >>>> On Sat, 02 Mar 2013 09:03:38 -0800, Joerg <invalid@invalid.invalid> >>>> wrote: >>> >>>[...] >>> >>>>> But what I meant was PC sales in general, including laptops. Many older >>>>> folks buy laptops these days because they don't want a space-hogging >>>>> tower and monitor setup. And it's the saem thing there: Writing setup >>>>> info that hardly ever changes into voltaile RAM is not smart. >>>> >>>> Who does that, with flash being so ubiquitous? >>> >>> >>>Jeff brought an example, I don't know which mfgs use this: >>> >>>http://www.bioscentral.com/misc/cmosmap.htm# >>> >>>I have a Dell and the manual states that an image of the CMOS should be >>>taken before removing the battery, in order to be able to restore the >>>settings in there. But it fails to say how and what software to use for >>>this. >> >>Maybe just write down the settings? There's not very many. >> >> ...Jim Thompson > > One of the best points in the entire thread.
I usually try to set things up to work with the defaults anyway. -- John Devereux
SoothSayer wrote: 

>>Yes. Just be careful not to drop it on a energized circuit board! > > > The strap or the battery? The strap is NOT the degree of "conductive" >you may think it is.
The battery. Make sure you have a good hold on it before removing & replacing. If you drop it on an a energized circuit you can short something out.