Date: Tue, 17 Mar 1998 12:20:42 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: Eivind Eklund <eivind@yes.no> Cc: hackers@FreeBSD.ORG, Alfred Perlstein <perlsta@cs.sunyit.edu> Subject: Re: DPT driver? Message-ID: <XFMail.980317122042.shimon@simon-shapiro.org> In-Reply-To: <19980316235350.62977@follo.net>
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On 16-Mar-98 Eivind Eklund wrote: .. > The DPT is a specific SCSI chipset (or at least a specific vendor). > The DPT driver only work for those cards. The vendor has a web-page > at "http://www.dpt.com/". A bit of background; Most DPt PCi cards actually have a Qlogic chip burried within. I do not know of any way of getting to them from the system bus. The way we talk to the DPT card, is via a protocol called EATA. It is an Extended ATA, and an ANSI standard. The protocol is basically a DMA arrangement of mailboxes. The next patch to the DPT driver will include in usr.sbin/dpt, a file called DPTdesign.{lyx,ps}. There is more information there. Unlike most/many other SCSI HBA vendors, ALL DPT cards since the mid 1980's use this very same protocol. The next generation cards speak I2O and this will be available to FreeBSD too. Once I get the card & docs to write the drivers (which are ``on the way''). ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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