Big problems with Firewire iPod and camcorder - please help!

Hi all,
I don't know where else to turn with this problem. I think I've damaged my Firewire kit.
I have an iPod 4G 20GB and a Canon MV901 MiniDV Camcorder. I used them both over Firewire with my Pismo without difficulty, but I then tried video editing on my Windows machine with a firewire PCI card. Scrabbling around the back of my computer, I think I somehow managed to get the firewire cable to the camcorder in the socket upside down, reversing the power and data conncectors. Nothing really happened, but the camcorder stopped showing up. I tried it a good few times, then tried my iPod. By some bizarre coincidence, I think I managed to plug the iPod in the same way. Now, my iPod doesn't work on either the Windows machine or the Pismo over firewire, but does over USB2.0 on my Windows machine.
I measured the power going through the Firewire power pins as around 13.5 volts on my Pismo and the card, but the card also has an auxiliary power connector. This was disconnected when I tested it, but was connected when the iPod and camcorder were.
The thing I would like to know is whether a voltage spike of this size could fry the firewire controllers on both devices. The iPod's diagnostic mode detects that firewire is connected, but will not show up. Strangely, it still charges over firewire from either machine. Have I permanately damaged the firewire controllers?
Thanks in advance,
Rob Johnson

Rob,
If you mistakenly inserted the FireWire connector twisted 180 degrees, the power lines can be directly connected to the data lines and can result in a fried PHY (connects the port to the FireWire bridge) or the FireWire bridge itself.
You can take a look at the voltage specs for FireWire ports and see that your voltage readings are well withing specs:
http://docs.info.apple.com/article.html?artnum=58207
I am not sure where you go from here. You could try a known-good FireWire device connected to your Pismo and see if it works. If not, the data-side of the FW port may have failed. I don't know about testing the iPod or camcorder.
A possible cheap fix for the Pismo FireWire is a FireWire PC card; if running 10.x, it will just be a plug & play affair. However, unlike built-in FireWire ports, FireWire PC cards supply very little bus power. Your camcorder will work since it has it owns power supply (assuming there is no hardware failure) and but am unsure about the iPod. The iPod will not charge, of course, but it may still work in data transfers. There are a few FireWire PC cards that also have their own power supply.

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