Date: Mon, 26 May 1997 12:02:57 -0400 From: Randall Hopper <rhh@ct.picker.com> To: Bernie Doehner <bad@uhf.wireless.net> Cc: multimedia@FreeBSD.ORG Subject: Re: Amancio's latest mods to bt848 driver (removal of floating point) Message-ID: <19970526120257.54104@ct.picker.com> In-Reply-To: <Pine.BSF.3.95.970525092918.326A-100000@uhf.wdc.net>; from Bernie Doehner on Sun, May 25, 1997 at 10:28:20AM -0400 References: <199705250731.AAA01091@rah.star-gate.com> <Pine.BSF.3.95.970525092918.326A-100000@uhf.wdc.net>
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Bernie Doehner: |However, as soon as I started heavy disk activity (concatenating several |large files together), fxtv totaly froze and I had to reboot.. Not even |IDE timeout messages, everything, but fxtv froze. | |If I don't kill inetd/sendmail, etc and run fxtv (in a small window) in |doesn't fataly crash any more, just I do get ocassional IDE timeout |errors. | |For those of you who "tuned in late", I must the only person trying to run |a Wincast board on a 486/120 and it seems the DMA is taking too much time |on the bus. Two things you might try. See if your BIOS will let you take your system clock down to 33Mhz or less (something to pull the PCI speed down to spec, assuming it is being overclocked to 40 now). Maybe something other than your Wincast on your PCI bus can't hack 40Mhz when the bus gets busy. Also, see if you BIOS supports locking your IDE channels down to Mode 3, 2, or 1. Another thing just popped into my brain. I remember big stinks about the RZ-1000 and CMD640 IDE chips. You might browse the URLs at the bottom of the message for making sure you don't have a problem board. Randall ------------------------------------------------------------------- http://www.wi.leidenuniv.nl/ata http://warp.eecs.berkeley.edu/os2/workbench/work.htm o the CMD640x, a dual-channel PCI to EIDE interface used on many mainboards (Intel!) and interface boards, has a number of dangerous bugs you need to be aware of. o The PC-Tech RZ-1000, used on AT&T, Dell, Gateway and Intel boards, also has two data-corrupting bugs. See also <http://www.intel.com/procs/support/rz1000/index.html>. In both cases, the corruption occurs only in specific software environments and is very subtle; you can go on working for months without suspecting anything more than buggy software. The damage can be immense. For all the details, look at Roedy Green's roedy@bix.com "PCI EIDE controller flaws" FAQ included with his EIDE test <ftp://garbo.uwasa.fi/pc/diskutil/eidete17.zip>; program which will test your system for the bugs.
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