English Amiga Board - View Single Post - PIC interesting a1200 m/b power hack: takes power from normal HDD power cable plug!

keropi · 16 June 2006, 13:41

Here what the owner said:

The cable is connected to the 12V,5V and Ground layers on the mainboard, near to the Power connector. Easy to find using a multimeter. Your are able to bridge the 5 Volt and the 12 Volts to the Floppy connector on the mainboard. The advantage of this solution is not loosing so much voltage on the way to the Expansion Port. Your accelerator will get nearly the 5 and 12 Volts and not only 11,5 and 4,6 Volts as the Amiga mainboard has thin layers and acts as a resistence ...

no mention of the -12V line, but he had a g-rex installed....

On my g-rex I only give +5 / +12 / GND, where the -12 goes to???

16 June 2006, 13:41	#9
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	Here what the owner said: The cable is connected to the 12V,5V and Ground layers on the mainboard, near to the Power connector. Easy to find using a multimeter. Your are able to bridge the 5 Volt and the 12 Volts to the Floppy connector on the mainboard. The advantage of this solution is not loosing so much voltage on the way to the Expansion Port. Your accelerator will get nearly the 5 and 12 Volts and not only 11,5 and 4,6 Volts as the Amiga mainboard has thin layers and acts as a resistence ... no mention of the -12V line, but he had a g-rex installed.... On my g-rex I only give +5 / +12 / GND, where the -12 goes to??? Last edited by keropi; 16 June 2006 at 13:49.