I have a Dell 4100 with Adaptec Firewire and USB 2.0 cards, and an HP XT395
laptop, which has a built-in Firewire port (4-pin).
The 4100 runs Windows 98SE and the laptop has XP Home. The Epson software,
including Silverfast installed on both machines without a problem.
When I hooked the scanner to the 4100 using Firewire, it was unhappy and the
device manager showed a Firewire device with no driver (???). Rather than
troubleshoot this, I hooked the scanner to the 4100 with the USB 2.0 cable and
it worked fine.
So I disconnected the 4100 and hooked the scanner to the laptop with a Firewire
cable and it worked just fine as well.
So, I thought, what will happen if I hook the scanner, through their respective
cables, to both computers at the same time? Smoke and flame? neither one
working? So I tried it.
And guess what? It worked just fine. The 4100 through USB, and the laptop
through Firewire. The ports are isolated from each other, and they only receive
a signal when the scanner software in the respective machine is activated.
So it looks like the Epson 3200 can be used as a shared peripheral, between two
computers, if you hook it up as I described.
As a test, I just opened the TWAIN capture on both machines at the same time.
Then I did a preview on each machine, one at a time. No problem.
Just don't try to do scans from both machines at the same time. As long as the
green light on the scanner is not flashing (busy) either computer can access