From owner-freebsd-hardware Mon Apr 20 10:34:53 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA19117 for freebsd-hardware-outgoing; Mon, 20 Apr 1998 10:34:53 -0700 (PDT) (envelope-from owner-freebsd-hardware@FreeBSD.ORG) Received: from caladan.tdx.co.uk (caladan.tdx.co.uk [195.188.177.4]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA18987 for ; Mon, 20 Apr 1998 17:34:33 GMT (envelope-from kpielorz@tdx.co.uk) Received: from tdx.co.uk (lorca-tx.tdx.co.uk [195.188.177.242]) by caladan.tdx.co.uk (8.8.8/8.8.8) with ESMTP id SAA12902; Mon, 20 Apr 1998 18:34:20 +0100 (BST) (envelope-from kpielorz@tdx.co.uk) Message-ID: <353B870B.C27F99AD@tdx.co.uk> Date: Mon, 20 Apr 1998 18:34:03 +0100 From: Karl Pielorz Organization: TDX X-Mailer: Mozilla 4.04 [en] (WinNT; I) MIME-Version: 1.0 To: "Gregory P. Smith" CC: freebsd-hardware@FreeBSD.ORG Subject: Re: Recomended ISA SCSI Cards References: <199804201726.KAA01852@ryouko.nas.nasa.gov> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Hi, Gregory P. Smith wrote: > > > Can anyone recomend any good ISA SCSI cards to use with FreeBSD? - > > Preferably something that'll work with a machine with >16Mb of RAM etc. - I > > have a 1542 but it's been nothing but trouble... > ... > > I'm not too sure I would want to replace an AHA1542 with an AHA1520/22 > > though - unless anyone else has any comments? > > "good" and "ISA" should not be used in the same paragraph. I know, I know... Don't remind me! > Any "good" ISA SCSI card is busmastering. The ISA bus only has 24 > address lines, meaning busmastering ISA cards can only access the > first 16mb of RAM. Your other option is the port I/O style card such > as the AHA1522. These require lots of CPU for the transfer but don't > have the 16mb limit. Yep... > My ISA recommendation is the 1542, followed by a 1522 if you don't like > the 16mb thing (really, these are your only sane choices). Most OSes I have a 1542 - but I've seen theres problems with bounce-buffers and stuff on the 1542 - I was looking to moving away from it if I can... > Real recommendation: get a PCI motherboard, they're cheap. The board allready is a PCI motherboard, I've just about got 1 PCI slot free - but I'd rather not waste it on a PCI SCSI card when all it's running is a Zip drive... I think I'll try to find out the current state of the 1542 vs Bounce buffers etc. - if not I'll plumb for the 1522... For once 'speed' is not of the essance... Regards, Karl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message