You need specific models of machines for the card to
be hosted. The
 microcode for the system I think includes OS/2 It's been some time since
 I loaded and ran the microcode on a cold machine.
 There is also a way to run the cards hosted on an RS 6000 hosted by AIX. 
 It actually pretty much works behind any PC that can run OS/2 and has a
 secondary PCI bus behind any of several specific models of PCI-PCI bridge.
 It also works just fine on AIX 4.3.3, but when Dave McGuire and I were
 hacking on it last time, we couldn't get the code to work on 5.1.