POWERING THE AMIGA THRU THE FLOPPY CONNECTOR

[amigaoneproductions]

I know of one thing at -12v is used for.

Try playing some music (mod, mp3 or whatever)

The sound will probably sound terrible,  the -12v is needed for the audio system,  I don't know if its used for anything else as an Amiga WILL power up and run stuff without it (Hmm thinking about it,  it MIGHT be used for the comms ports in some way or other,  but not 100% sure on that)

If you dont need sound or comms,  you might get away with it

[amigaoneproductions]

Is there any way of using the existing soft switch in the Tower case to switch the amiga on?

No,  an atx soft switch is a momentary push to make,  which means when you let go,  the circuit is broken again and the psu will switch off.

What you need to do is replace that switch with a locking or toggle switch that stays in the same state until you press it  again