Wrapping up a few things here... 3Com 3C515. Of course, you don't get full bandwidth out of it, but if you really, really have to get an ISA-only box on a 100Mb network, it does work quite well. And there's a Linux driver :-). FWIW...the HP ISA 100Mb card is probably a 100baseVG card, which requires a special hub. Hmm...there are a bunch, actually. As far as motherboards (as in, not systems) that you can run out to web sites and buy: - Intel boards based on ServerWorks and i860 have them, and they showed up occasionally on earlier Xeon boards - Sun ATX form factor UltraSPARC boards have them - Later Alpha ATX form factor boards have them - At least one version of the Motorola MTX PowerPC ATX motherboard has them (well...okay...this one is pretty obscure) - Finally...my odd/rare Galileo MIPS-based system has them...:-) Umm...not sure what you are trying to say. As far as I know 32-bit & 64-bit interoperability *is* part of the the PCI standard, and works vice versa. In fact, I'm pretty sure per the standard, there is interoperability between 33MHz and 66MHz cards. You really only get locked out with 5v v. 3.3v issues. In other works, a card that claims PCI 2.1 compliance will interoperate. Ken