Subscribe via RSS

Amiga 1200: ATX Power Supply

Amiga 1200s are ancient now... if you're having phantom issues with hardware or software then a crappy power supply may be to blame! Adding extra hardware, overclocking and otherwise modding these old machines also puts undue strain on their ageing power supplies.

DSC05022 DSC05023 DSC05024

DSC05025 DSC05028 DSC05030

Due to this, it's best to prevent problems and provide a fresh and powerful source from which the A1200 can drain as many electrons as it wants.

Wiring up an ATX Power Supply

This is very straight-forward. All ATX supplies provide the required wires for the Amiga motherboards. Unfortunately, they also provide 100 other cables of which we don't need.

Ian Stedman's site has all the information you need to get the power supply hooked up. I followed the instructions and had no issues at all.

DSC05034 DSC05036 DSC05037

If you're installing this in a tower case, then you can easily hide the extra wiring. If you're still using the 'keyboard' case, then you may want to find a way to discard all the extra cables. One method might be to de-solder or cut them right back at the power supply main board. Just be careful if you're opening it.

The wiring for the cable goes as follows.

ATX Power Supply Red Yellow Blue Black not connected
Component +5v +12v -12v Ground Shield
Amiga 1200 Red Brown White Black Yellow

Note: Don't forget to connect green from the ATX supply to ground! This is the soft-power latch that needs to be grounded for the supply to turn on.

DSC05038 DSC05040 DSC05043

I entirely recommend you confirm the wiring from your Amiga power cable is wired as above! Also make sure that you test the cable prior to plugging it in to your Amiga!

After a quick test, I plugged it in and the A1200 purred away. Unfortunately my PCMCIA Ethernet issues still continued!