Subject: [OT] Jumping PC164 to work with ATX power supply
To: NetBSD/Alpha <>
From: B. James Phillippe <>
List: port-alpha
Date: 10/16/2001 19:16:04

I am trying to install a PC164 board into a custom mini-tower case with a
standard ATX power-supply.  After having trouble, I did a Net search and
discovered that the PC164 does not support soft-poweron, and thus doesn't
work with a standard ATX power-supply.  Further, I learned that it can be
made to work by either using a modified power-supply or shorting the PSON
and GND pins of the ATX connector on the mainboard.  This effectively tells
the power-supply that soft-poweron is always on, so the power-supply will
activate at full power.  This is ideal for me because my power-supply has
an override switch on the back.

I tested this theory by using a (plastic-handled!) screwdriver to short
those pins and voila, instant power.  Just to be safe, I measured the
impedence of those pins with an Ohmmeter beforehand. :-)

Anyway, has anyone does this before?  I have a soldering iron and eltronics
solder and am willing to give it a go.  Anyone who has done this and had
problems (or knows of other reasons I should proceed with caution) please
let me know.

Here is the web site I found for reference:

# bryan at terran dot org                      Support the American Red Cross