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.
Jim
On 5/16/2012 4:15 AM, Torfinn Ingolfsen wrote:
  On Wed, May 16, 2012 at 2:46 AM, Benjamin Huntsman
 <BHuntsman at mail2.cu-portland.edu>  wrote:
  Anyone here interested in a PCI-based IBM P/390
board (Not E)?  I've actually got two that I'm not using, and a PARCA
 bus-and-tag board, and think that some other hobbyists should have a chance to acquire
this stuff... 
 Interesting. Do you need OS/2 on the host machine for this card to
function?