I personally wouldn't bring in power through the floppy connector...
My $0.02...
- You may be bypassing some important power conditioning circuits.
- You won't bring in the -12v line, which is probably necessary for the audio and serial circuits.
- You won't have the earth ground line. Maybe not a big deal, but could possibly cause some audio noise.
The standard power supply on the 500/600/1200 has the following lines...
+12V
-12V
+5V
Ground
Earth Ground
I learned a lot about the PS building my "mega" power supply for my 1200...
http://www.amiga.org/gallery/index.php?n=2905=10
