From owner-freebsd-scsi Wed Apr 29 21:41:21 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id VAA01036 for freebsd-scsi-outgoing; Wed, 29 Apr 1998 21:41:21 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from david.siemens.de (david.siemens.de [192.35.17.14]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id VAA01024 for ; Wed, 29 Apr 1998 21:41:16 -0700 (PDT) (envelope-from andre.albsmeier@mchp.siemens.de) Received: from salomon.mchp.siemens.de (salomon.siemens.de [139.23.33.13]) by david.siemens.de (8.8.8/8.8.8) with ESMTP id GAA03079 for ; Thu, 30 Apr 1998 06:40:50 +0200 (MDT) X-Envelope-Sender-Is: andre.albsmeier@mchp.siemens.de (at relayer david.siemens.de) Received: from curry.mchp.siemens.de (daemon@curry.mchp.siemens.de [146.180.31.23]) by salomon.mchp.siemens.de (8.8.8/8.8.5) with ESMTP id GAA13095 for ; Thu, 30 Apr 1998 06:40:51 +0200 (MDT) Received: (from daemon@localhost) by curry.mchp.siemens.de (8.8.8/8.8.8) id GAA01035 for ; Thu, 30 Apr 1998 06:40:51 +0200 (CEST) From: Andre Albsmeier Message-Id: <199804300440.GAA06386@internal> Subject: Re: I ment the AIC7895 and not the AIC7985 :-) In-Reply-To: <199804291848.MAA27221@narnia.plutotech.com> from "Justin T. Gibbs" at "Apr 29, 98 12:48:48 pm" To: gibbs@narnia.plutotech.com (Justin T. Gibbs) Date: Thu, 30 Apr 1998 06:40:48 +0200 (CEST) Cc: andre.albsmeier@mchp.siemens.de, scsi@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL40 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > In article <199804291638.SAA19643@internal> you wrote: > >> > >> I would like to know how different is the AIC7895 chip > >> compared to the AIC7880 apart from supporting two SCSI > >> channels. I know it is supported in CAM and maybe the CAM > >> developers can tell me if it is more or less two 7880's > >> in one chip. > > The 7895 has two, completely independent, SCSI sequencers and > risc processors, each with two DMA FIFOs, dumping into a single > PCI bus module. These two "cores" provide similar functionality > to independent aic7880s, but the register set is somewhat different > and it would be non-trivial to add support for the aic7895 to the > older driver. The main difference is the way commands must > be queued to the chip, but there are other, performance related, > features that should also be supported. I see. I think that's too much for me. If it had been only some initialization stuff, some probing,... I would have given it a try. Thanks anyway, -Andre To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message