Hello, I am rebuilding a Northgate ZX-Portable (almost done) but need some information on the AC charger. The AC Adapter output connector (the part that plugs into the computer) was hacked off when I acquired the computer. I've bought a replacement connector, but still need information on the AC Adapter pin-outs. Does anyone have a similar machine, and could tell me the pin-outs for the battery charger, or offer some advice on where to find this information. The part number for the Northgate AC Adapter is 850-0215. I am new to this list, and glad to have found it. Classics are great! Thanks in advance, Dan Lee