Osstest doesn't find my sound card (SB600)

[axellec]

I believe I have a SB600 (with Realtek Codec ALC888) on Solaris 10 x86.
osstest doesn't report anything:

Sound subsystem and version: OSS 4.0 (b1014/200802281506) (0x00040003)
Platform: SunOS/i86pc 5.10 Generic_127112-11
NOTICE! You don't have any audio devices available.

though OSS says this is a supported sound card.
Can somebody provide hints to help me activate my sound card ?

Regards,
Axelle.