Re: AlphaPC 164 Power..
As far as I know there is not a motherboard connection for the power-on
function in the power supply (went down this same road <grin> and had to
reverse engineer the ATX power supply to figure out what was going on...)...
If you check the power supply wiring definitions (use an ATX Intel based
motherboard for the pin defs) you will find one of the connector pins
(fourth over from the only 3.3V pin on one side I think) labeled something
like DC_CTL or such - anyway, it is usually a rather thin green wire in most
ATX power supply wiring to the motherboard - this is the DC power control
line and when tied to ground will "turn" on the DC output of the power
supply (that is the method the ATX motherboards use to control the DC power
to the system for power down operation). If you take the wire and tie it to
ground you can use the power switch on the back of the computer case to
control the power (and it had the advantage where you or someone else can
not accidentally power down the system from the front "pwr" switch
<grin>)...
Once you make your changes check the power supply outputs PRIOR to
connecting to the motherboard to make sure you have everything wired
correctly - nothing worse than letting the "magic smoke" out of the
motherboard because of a wiring mistake!!!
hope the information helps...
gm..
-----Original Message-----
From: Matthew R. Pavlovich <mpav@purdue.edu>
To: debian-alpha@lists.debian.org <debian-alpha@lists.debian.org>
Date: Monday, August 23, 1999 9:40 PM
Subject: AlphaPC 164 Power..
>I am having problems figuring out where to connect the power switch to the
>motherboard. I have a AlphaPC 164 Motherboard (not SX/LX). I am assuming
>that I will need a special ATX power supply or that I am not reading the
>manual correctly.
>
>Any help would be appreciated.
>
> Matt
>
>P.S. My powersupply does have an external power switch next to the
>powercord.
>
>
>
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