I have no idea what it means.  However, I checked my PC (Windows 98), as
follows. Go to Control Panel, open System, click Device Manager tab, and
open System Devices.  Select PCI bus, and click Properties, which will
open a PCI bus Properties window.  Click IRQ Steering tab.   You will
see some options, two of which mention PCIBIOS 2.1.  I suppose that is
what they refer to.  My settings have "Get IRQ table from Real Mode
PCIBIOS 2.1 call", which is probably the usual setting, I never looked
at it before.  I do not have the SB live card, but I cannot imagine that
something different from other sound cards is needed.  Hope this helps.

Job van Zuijlen

richard bowers wrote:
> 
> Sorry that this is not really to do with CSound, but you're my only source
> of help. The SBlive system requirements state PCI 2.1. What the hell does
> that mean and how can I find out which version my pc supports?
> 
> Thanks,