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Date:      Thu, 28 Oct 1999 22:21:15 +0200 (MET DST)
From:      Gerard Roudier <groudier@club-internet.fr>
To:        "Kenneth D. Merry" <ken@kdm.org>
Cc:        BOISSEAU Jean-Philippe <jean-philipe.boisseau@sextant.thomson-csf.com>, freebsd-hardware@FreeBSD.ORG, nsouch@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG
Subject:   Re: Tekram DC 395
Message-ID:  <Pine.LNX.3.95.991028221121.372B-100000@localhost>
In-Reply-To: <199910280226.UAA12960@panzer.kdm.org>

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You must be aware of the following when deciding to buy such a controller:

The S1040 has no phase engine, unlike the aic7xxx and the sym53c8xx chips,
for example.

The means that all phase changes must be handled by the C code.  Result is
at least 5 (more?) interrupts + some (much?) programmed IOs from the C
code for the execution of a each SCSI IO (the chip does DMA for the data).=
=20

Basically the design of this chip is similar to the amd53c974.

I suggest people to prefer the Tekram Boards based on SYM53C8XX chips that
are excellent products for a quite reasonnable price.
(DC-390-U/F/U2B/U2W etc ...)

G=E9rard.

On Wed, 27 Oct 1999, Kenneth D. Merry wrote:

> [ CCed to -scsi, as people there might be interested ]
>=20
> BOISSEAU Jean-Philippe wrote...
> > Hi.
> > I'd like to know if there is a work in progress for Tekram DC 395 SCSI
> > card.
>=20
> Actually, Tekram has written a driver for the card.  I don't know much
> about the card or driver, but the driver is available at ftp.tekram.com.
>=20
> I have a slightly newer version (1.06, the version on the ftp site is 1.0=
5)
> that Erich Chen sent me in early September, but I haven't had a chance to
> do much with it.
>=20
> In any case, I'd suggest that you first contact Erich Chen
> <erich@tekram.com.tw>, as he is likely to have the latest version of thei=
r
> driver for the TRM-S1040 chip that's on their 395 and 315 boards.  If tha=
t
> fails, I can just give you a copy of the driver he sent me.
>=20
> Tekram is to be commended for putting forth the effort to support FreeBSD=
=2E
> They have actually written three different FreeBSD/CAM drivers -- one for
> their AMD 53c974 boards (the amd driver in the tree is based on that
> driver), one for their NCR/Symbios boards, and now one for their own SCSI
> chips.
>=20
> Ken
> --=20
> Kenneth Merry
> ken@kdm.org
>=20
>=20
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> with "unsubscribe freebsd-scsi" in the body of the message
>=20
>=20



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