Plus4 Power Supply

From: Niklas Ramsberg (
Date: 2002-09-17 19:58:07

Hej allihop!

As of today I am the proud owner of a Plus4 and 1551 disk drive. Unforunately the computer came without a PSU. 

So I was thinking of using a C64 PSU. I'll take the square plug from an old Amiga 600 PSU and attach that to the C64 PSU cable. As you all know by now, I'm an idiot when it comes to electronics. Using my multimeter I've managed to figure out which leads provide the 9V AC (brown & yellow), but how do I know which is ground and which is +5V? When I connect the red probe to the white lead and the black probe to the green lead, I get a +5V readout. If I switch them around, I get -5V. Please help me out!

/Niklas Ramsberg

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