Upon testing, i found that the "Power good" (PG) pin on the motherboard 
connector must be held Low for the board to operate. this is done by 
connecting it to ground.
does not seem to have any adverse affects.
I researched the issue and found that the reason for the PG pin is because 
there is a power up time for power supplies. this means that for the first 
few miliseconds when you turn on the supply, the power rises untill it 
reaches the needed amount. then it pulls the PG pin to ground to let the 
motherboard know it is safe to operate.

With a battery operated supply, there should not be any power up. turn it on 
and it's there. so it is safe to say the PG pin can be connected to ground 
while on battery power supply. if it is doen while on AC power supply, it 
will probably degrade the board components over time.

-Travis


>From: "Travis Farmer" 
>Reply-To: psn-l@..............
>To: 
>Subject: RE: Gas Generator recommendations
>Date: Tue, 8 May 2001 22:53:33 -0400
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>2001 19:56:16 -0700
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>From larry_cochrane@.............. Tue May 08 20:06:34 2001
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>
>Last I knew, the "power good" signal was directed at the power supply so it
>knew if it was getting power to the board. If not, the supply shutdown.
>I have an old 486 board I can fiddle with and see what happens.
>I will just connect the power supply wires needed for +-12V, and +-5V. I
>will report back with the results.
>I my self am curious if it will work now that I really get to thinking 
>about
>it.
>
>-Travis
>
>-----Original Message-----
>From: psn-l-request@.............. [mailto:psn-l-request@.................
>Behalf Of Erich Kern
>Sent: Tuesday, May 08, 2001 10:11 PM
>To: psn-l@..............
>Subject: Re: Gas Generator recommendations
>
>Computer power supplies also have a "good power" output lead which tells 
>the
>processor that AC power has been applied to the power supply. I've never
>checked
>the lead to see if it's AC, DC or what voltage, but without this input, a 
>DC
>only system may not work.
>
>Cheers,
>Erich Kern
>
>
>-----Original Message-----
>From: Travis Farmer 
>To: psn-l@.............. 
>Date: Tuesday, May 08, 2001 3:39 PM
>Subject: Re: Gas Generator recommendations
>
>
>Re: the direct battery powered computer.
>
>A computer generally has 4 power sources. +12VDC, -12VDC, +5VDC, and -5VDC.
>all sources are needed to run the computer.
>check out http://home.midmaine.com/~cgf/graphics/comp_power_supply.jpg for
>an example of how it can be done. (charger not shown)
>
>Re: the carburetor on my Honda generator.
>
>Depends on how mechanically inclined you are. (visit the Honda shop
>otherwise)
>Get a can of spray carb cleaner (available at 99.9% of auto parts stores).
>if the carb venturi area is accessible with the carb mounted, spray a few
>small squirts on the jets. Pull the engine over a few times to burn off the
>cleaner (don't spray too muck or you will flood the engine). if it does not
>run smoothly yet, turn it off (unless it didn't start in the first place)
>and spray a few more times. make sure to pull it over a few times every now
>and then. Take notice, carb cleaner is very volatile. about the same as a
>burst of nitro into the engine. don't spray too much.
>If the carb is easily removable (enough so that you can do it without help)
>then do so and give the jets a good spray. if it is of the float bowl type,
>fill the bowl with cleaner and lightly shake it (cleans the bowl and the
>needle jets). Make sure to replace any gaskets with new ones (unless they
>are of the paper kind, those are multi use usually. if there is a mettle
>ring on the gasket, replace the gasket.)
>if doing this gets it into a more or less running state, then run a tank of
>high octane gas. Octane booster is available at wal-mart last I knew. about
>a pint to a 5 gallon can seems to work well (read the directions). Add this
>to premium gas (highest level of octane from the pump). the engine will run
>a little hotter so make sure to stop it and give it some cool off time if 
>it
>gets too hot (don't cool off with water, it will crack the block). the
>higher octane will dissolve most of the remaining varnish.
>A way of figuring the running temp, feel the exhaust gas (about a foot away
>from the muffler/pipe so as not to get burned) with your hand. most engines
>run cool enough that the exhaust is hot but not so hot it burns. if it 
>feels
>too hot, give it a break for a little while.
>only use a tank of gas (or two if it is a small tank) because the higher
>octane will lower the lifetime of the engine if used too much. If all else
>fails, visit your local Honda shop.
>
>if there is allot of super high octane gas left over, pour it into your car
>(unless it has oil pre-mixed for a 2 cycle engine). it will do wonders.
>(cleans injectors, fuel lines, pump, ect...) and as an added bonus, it 
>gives
>better acceleration.
>
>-Travis
>
>
>
> >From: CapAAVSO@.......
> >Reply-To: psn-l@..............
> >To: psn-l@..............
> >Subject: Re: Gas Generator recommendations
> >Date: Tue, 8 May 2001 11:24:31 EDT
> >MIME-Version: 1.0
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> >2001 08:26:48 -0700
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>id
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> >-0400 (EDT)
> >From larry_cochrane@.............. Tue May 08 08:37:12 2001
> >Message-ID: 
> >X-Mailer: AOL 4.0 for Windows 95 sub 114
> >Sender: psn-l-request@..............
> >
> >
> >Hi Travis,
> >
> >I like your idea and plan on eventually building a similar backup system.
> >What I would like to know is how can I go about eliminating the 12V 
>DC/120V
> >AC inverter in your system. Since the computer ultimately runs on DC 
>power,
> >how can I just run it from the 12V batteries? Then a charger with an
> >automatic cutoff when the batteries are fully charged, could be connected
> >permanently to the 12 V batteries so they are always kept fully charged. 
>If
> >the 120V AC mains go down as is happening in California, the computer 
>would
> >not know it happened because it is running off the batteries. They will 
>of
> >course run down eventually but that problem can be taken care of with a
> >generator. I have an 800 Watt Honda 120V AC generator that also has a 12 
>V
> >DC
> >output that could be used to keep the batteries charged until the mains
> >came
> >back on. I hope somebody can tell me what to do inside my computer to
> >convert
> >it to run on 12V DC from the batteries.
> >
> >Also another question, does anybody know how I can clean the carburetor 
>on
> >my
> >Honda generator. I left gas in it for too many months and now it won't
> >start.
> >I took the carburetor apart and blew it out with air but it still won't
> >start. How can I get it running again?
> >
> >Best regards,
> >Cap
> >----------------------------------------------------------------------
> >In a message dated 05/07/2001 11:32:27 PM Eastern Daylight Time,
> >travis5765@........... writes:
> >
> ><<  You can build a battery backup fairly simply.
> >  just get a 12V - 110V (or whatever you need) power inverter in the
> >wattage
> >  you need, connect lots of Deep-cycle marine batteries in parallel to 
>the
> >  inverter. get a hefty, low noise, battery charger to charge all the
> >  batteries (as fast as you use the power). set up a 12V relay (with lots
> >of
> >  power handling) so that the relay coil is directly powered by the 
>charger
> >  and the switch (duel or single pole) connects/disconnects the batteries
> >from
> >  the charger. it should be setup in such a way that when the charger no
> >  longer has power, it deactivates the relay and disconnects the 
>batteries
> >  from the charger so that it does not discharge them. at least this is 
>how
> >  the UPS I have works (just one battery at the moment).
> >  Just a note, the charger should be an auto charger (automatically stops
> >when
> >  the batteries are fully charged) so as not to over charge the 
>batteries.
> >
> >  -Travis
> >   >>
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