From owner-freebsd-questions Sat Mar 2 00:03:30 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id AAA18037 for questions-outgoing; Sat, 2 Mar 1996 00:03:30 -0800 (PST) Received: from specgw.spec.co.jp (specgw.spec.co.jp [202.32.13.1]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id AAA17983 for ; Sat, 2 Mar 1996 00:02:45 -0800 (PST) Received: from localhost (uucp@localhost) by specgw.spec.co.jp (8.6.5/3.3Wb-SPEC) with UUCP id QAA04227; Sat, 2 Mar 1996 16:45:46 +0900 Received: by tama.spec.co.jp (8.7.3/6.4J.5) id QAA02341; Sat, 2 Mar 1996 16:45:36 +0900 (JST) From: Atsushi Murai Message-Id: <199603020745.QAA02341@tama.spec.co.jp> Subject: Re: Backup problem To: tomppa@fidata.fi Date: Sat, 2 Mar 1996 16:45:35 +0900 (JST) Cc: nate@sri.MT.net, questions@FreeBSD.org In-Reply-To: <199602292328.BAA02445@zeta.fidata.fi> from "Tomi Vainio" at Mar 1, 96 01:28:04 am Reply-To: amurai@spec.co.jp X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-questions@FreeBSD.org Precedence: bulk > AMI SCSI adapter is EISA bus master and it also can do DMA over 16MB > memory in Adaptec 1542 compability mode but FreeBSD driver doesn't > support it. Sounds like you are confusing.. 1. Adpatec 1542 compatible mode is impossible to handling above 16MB due to 24bit pointer architecutre of firmware. So even hardware has 32bit addressing like EISA, driver can tell to firmware as 32bit address. 2. Some old EISA mother board has a limitation to over 24 bit addressing phygically. > I'm not using options BOUNCE_BUFFERS when running this > card in Buslogic 742a EISA mode but with Adaptec driver FreeBSD wont > even boot without it. As far as I know, BOUNCE_BUFFERS is not for driver opiton, it's implement to upper layer (i.e. SCSI system). Addition aha driver is no longer compatible adaptec 1542 well know as industry standard ;-) Atsushi. -- Atsushi Murai Internet: amurai@spec.co.jp System Planning and Engineering Co,.Ltd. Voice : +81-33833-5341