there are two versions of the TCDS (turbo channel dual scsi) card,
one is slow (5MB/sec) and one is fast (10MB/sec).  the slow one
appears to be the PMAZB-A and the fast is PMAZB-AA.  i get decent
performance out of both them on a dec3000/400 (alpha), but i've
only tried the slow card in my pmax (/260) where it performs about
as well as you'd expect.  note that only very recent netbsd/pmax
has support for the tcds (ie, not NetBSD 1.5) .. it was about 2
weeks ago or less i commited the support.


.mrg.