Hyung-song Nam <nam@wi.mit.edu> wrote;

> This message is probably slightly off-topic, but my web searches 
> yielded nothing, so I solicit your wisdom: Where the heck can I get a 
> TC FastSCSI-2 (10 MB/s) card for a 3000/300X?

Please shop eBay or other auction sites for PMAZC-A.

> How much do they go for?

It depends on how much people are willing to pay for.

I have tested PMAZB-A on DEC3000/300 (150MHz 21064) expecting it would
show any difference from builtin single channel TCDS.  It might have
been faster or slower.  I composed 16 (or some) RZ28B drives
striped/concatenated with ccd psuedo devices in a single /300, and ran
disk performance measurements.  The result was simple; no gain nor
loss between them.  It's interesting to notice because /300 has
12.5MHz TC option slot while builtin TCDS is directly attached with
system bus.  Having PMAZC-A instead might bring a benefit or little
gain.

I ran performance measurement on DECstation 5000/25.  It also showed
little difference between the builtin IOASIC SCSI and PMAZB-A sat on
12.5MHz TC slot, so it's imprecative.

Technically, it'd be possible to expect performance boost with KZTSA-A
i960 equipped single channel differential SCSI TC card, however,
NetBSD does not have any support for it this moment.

Tohru Nishimura
Information Technology Centre
Nara Institute of Science and Technology