Adaptec 154xB SCSI host adapter (was: Re: WD SCSI Controller)

[Doug Pintar]

In article <1990May6.135921.13129 at cti-software.nl> pim at cti-software.nl (Pim Zandbergen) writes:
>New Adaptec 154xB ? Could anybody shed some light over this?
>What is different from the A model? How compatible is it?

I have one, and it's very similar from a programming standpoint, so the
existing 386/ix HPDD driver works just fine.  It has some additional
programmability as to speeds when doing its first-party DMA, and you can
get more information (like who's negotiated synchronous transfers) from
it.  The board is half-long, and may be a bit faster.  It also supports
both target and initiator modes, so you could use SCSI to connect two
systems (386/ix, however, does not support this).  It's a nice board;
I have no idea as to how available it is, however.  I got mine from Adaptec
to make sure the new firmware/bios/hardware all worked with 386/ix.

Doug Pintar