My old Dell laptop had an on board VIA chip set Firewire port. My Tascam FW-1884 would not work on that. Bought a TI Express Card; problem solved.
Thanks, Ed. Anecdotal evidence isn't too hard to find, especially when it comes to issues with integrated ports on laptops. What I've been searching in vain for - for years - is a technical explanation for why it is so.
For all we know, VIA may have just released a badly-written driver. That wouldn't be a good reason to avoid, say, NEC chipsets.