It's this -> http://www.google.com/search?&q=ATX+AT+adapter
The older PSU are AT style. Unless you are trying to save something like my old DUAL Pentium Pro with overdrives, there is almost zero reason to do this. Walk around your neighborhood and ask if they have an old PC that they can give you. If you lucked out and found me, I'd open the garage door and give you something.
This stuff is out there. Go ask.
I'm replacing the power supply in an older computer, and the color scheme on the dead power supply wires (where it connects to the on/off switch on the front of the machine) is different than a normal ATX power supply. On the old PS, the wires are as follows: two white wires on the left, and two dark grey wires on the right, whereas an ATX PS has a white, brown, blue and black wire.
Can someone tell me what type of PS this old one is, and is there a way to wire up an ATX PS to this old machine without frying it?
thank you for your help.