Date: Sun, 21 May 1995 13:21:26 -0700 From: Torbjorn Granlund <tege@cygnus.com> To: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> Cc: davidg@Root.COM, sef@kithrup.com, freebsd-bugs@FreeBSD.org Subject: Re: MAJOR problem with FreeBSD-2.0-RELEASE Message-ID: <199505212021.NAA25309@cygnus.com> In-Reply-To: Your message of "Sun, 21 May 1995 12:44:11 PDT." <199505211944.MAA03687@gndrsh.aac.dev.com>
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If this is the Intel Zappa board, make sure you are using TIN connectors on the SIMM modules, if they are gold you may have a very serious memory system problem. (The data book that came with your Zappa board will say to use only Tin SIMM modules, believe it!!!). The SIMMs have tin connectors. This really smells like memory system problems. Are you running a 90Mhz or 100Mhz CPU?? The Zappa board is not rated for 100Mhz operation (or at least the 2 board I looked at clearly stated 75 or 90Mhz but not 100 Mhz.) I use a 90 MHz CPU. (Becasue of the 20ns SRAMs I didn't dare to set the jumpers for a 66 MHz external clock rate.) > Another problem is the driver for the buslogic card (bt742.c?). It doesn't > do synchronuous SCSI with my Buslogic KT-946C. I cannot get to > ftp.cdrom.com, so I cannot check if the driver is improved. Is it? Humm.. been running bt946's in sync mode for over a year, what version of the board/BIOS/firmware do you have? I don't remember, but the card is brand new. (I'll check the version in a bit.) Do you have the sync options enabled on the bt946C? They are enabled correctly. And the BIOS recognizes that the drive is capable of synchronuous transfers! > Note that we observed the exact same behaviour when using FreeBSD 2.0 on > a completely different system (different CPU, motherboard, disks, SCSI > card) . This makes it unlikely to be hardware problems. Ahh... FreeBSD 2.0, been a long time since I've run it, could very well be problems in that release. Though I have run make world using it to upgrade a system to 2.0 current back in February (initial boot strapping of my build environment here after being gone for some time). That was run on a Opti based P54C-90 with a BT946C and 16MB, would not have seen a bounce buffer bug :-(. Could you possibly make a newer kernel that I can try?
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