Date: Sat, 26 Aug 1995 22:40:18 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org Subject: Re: Byte-swapping on NEC IDE CD ROM Message-ID: <199508262040.WAA17141@uriah.heep.sax.de> In-Reply-To: <199508261409.JAA25201@chrome.onramp.net> from "Jon Loeliger" at Aug 26, 95 09:09:56 am
next in thread | previous in thread | raw e-mail | index | archive | help
As Jon Loeliger wrote: > > As Joerg suggested, I byte swapped the entire atapi probe tb buffer, > and things look promising. It's raised a few questions too. ... > One question: Is it likely that I will have to byte swap the buffers > headed out to the drive? Will the user data buffers need to be swapped > too, or just things like the command/response buffers? No idea, but i've found this in the archive, even though i've never seen Søren's original message, just Paul's reply only: : From: Paul Richards <paul@netcraft.co.uk> : Message-Id: <199508211013.LAA28054@server.netcraft.co.uk> : Subject: Re: ATAPI : To: sos@freebsd.org : Date: Mon, 21 Aug 1995 11:13:39 +0100 (BST) : Cc: paul@freebsd.org, vak@cronyx.ru, FreeBSD-current@freebsd.org : In-Reply-To: <199508210531.WAA21303@freefall.FreeBSD.org> from "sos@freebsd.org" : at Aug 20, 95 10:31:41 pm : Reply-to: paul@freebsd.org : X-Mailer: ELM [version 2.4 PL24] : MIME-Version: 1.0 : Content-Type: text/plain; charset=ISO-8859-1 : Content-Transfer-Encoding: 8bit : Content-Length: 1591 : Sender: current-owner@freebsd.org : Precedence: bulk : Status: OR : : In reply to sos@freebsd.org who said : > : > In reply to Paul Richards who wrote: : > > : > > My IDE cdrom seems to think it's a hard disk. : > > : > > wdc0 at 0x1f0-0x1f7 irq 14 on isa : > > wdc0: unit 0 (wd0): <WDC AC2540H> : > > wd0: 515MB (1056384 sectors), 1048 cyls, 16 heads, 63 S/T, 512 B/S : > > wdc0: unit 1 (wd1): <WDC AC2540H> : > > wd1: 515MB (1056384 sectors), 1048 cyls, 16 heads, 63 S/T, 512 B/S : > > wdc1 at 0x170-0x177 irq 15 on isa : > > wdc1: unit 0 (atapi): <EN C DCR-MOD IREV2:06>, removable, dma : , iordis : > > wdc1: ATAPI hard disks not supported : > > : > > It's not working anyway. It's an NEC CDR-260, claims to be ATAPI rev 1.7B : > > compatible. : > : > Oh well, you have one of the drives that doesn't byteswap its name :) : > It probably has other "non-std" things as well, making the driver : > fail to see it as a CDROM. This was one of the probelms that effectively : > delayed my ata driver, there seems to be no clear way to deal with this : > except searching through a table with known stange devices.... :-( : -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199508262040.WAA17141>