From owner-freebsd-alpha Wed May 16 6:50:40 2001 Delivered-To: freebsd-alpha@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id 0532D37B422 for ; Wed, 16 May 2001 06:50:35 -0700 (PDT) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id JAA17568; Wed, 16 May 2001 09:50:20 -0400 (EDT) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.3/8.9.1) id f4GDno327305; Wed, 16 May 2001 09:49:50 -0400 (EDT) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15106.34174.166105.432424@grasshopper.cs.duke.edu> Date: Wed, 16 May 2001 09:49:50 -0400 (EDT) To: Riccardo.Veraldi@fi.infn.it Cc: "Michael A. Smith" , Subject: Re: 500a/au In-Reply-To: References: <5.0.2.1.2.20010516095407.00a6dd48@www.maiatech.com> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Riccardo.Veraldi@fi.infn.it writes: > > Anyway in the file HARDWARE.TXT in the FreeBSD ftp site there is written > that the thing which make difference in recognizing a Miata MX5 against a > Miata GL is that the last one has 2 USB ports. But is it really correct ?? > > Rick As far as I know, yes, as long as the USB ports are on the MLB. One would think that one could just use the version of the chipset. However, I was told that they couldn't change the version number when they fixed the problems. If they did, they'd be forced to re-certify the platform with Microsoft for use with NT. This was expensive & time consuming, so they avoided it, and now we have this confusing situation. I do know that the MLB was redesigned when they came out with the fixed pyxis (21174) chipset. The MX5 Miatas uses an Intel PCI/ISA bridge, a National PC87303 Super I/O chip and a CMD PCI0646 IDE controller. The newer GL models have a Cypress 82C693 which has the PCI/ISA bridge (function 0), SuperIO (on ISA bus) and IDE controller functionality (functions 1 & 2) in one chip. Additionally, at function 3, it has the USB controller. As to why I'm pretty sure that this is true -- DEC was contractually obligated to supply stable Miatas to us (*) so we got an early engineering sample of the GL MLB. As far as I can tell, both it and the production MLB upgrades we received are identical to the above description. I'm pretty sure the MLB upgrade coincided with the PCI riser upgrade. This upgrade involved integrating the ISP1040 SCSI adapter onto the PCI riser card, as well as upgrading the version of the PCI-PCI bridge. When we received our MLB upgrades, we also received riser upgrades and were told we must upgrade the risers as well. I only bothered if I needed to free up a SCSI adapter, as it was such as a PITA. (the MLB upgrades are trivially easy). BTW, I think this is where the discrepancy in the version of scsi controllers on the "a" and "au" models comes from. Since the 1040 is integrated onto the riser board, there is little point in slapping a 2940 into an a-series GL, so the a-series GLs almost certainly shipped with ISP1040 adapters. Cheers, Drew ------------------------------------------------------------------------------ Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin Duke University Email: gallatin@cs.duke.edu Department of Computer Science Phone: (919) 660-6590 (*) MX5s aren't stable under heavy PCI load. By heavy PCI load, I mean multiple bus masters on the 64-bit bus which are capable of sustaining over 120MB/sec. I doubt you'll push it this hard. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message