*BSD News Article 84317


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From: Ken Bigelow <kbigelow@www.play-hookey.com>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: boot floppy problem
Date: Wed, 04 Dec 1996 20:05:03 +0000
Organization: Erol's Internet Services
Lines: 29
Message-ID: <32A5D96F.1837@www.play-hookey.com>
References: <5804t1$63s@tofu.alt.net> <580ar5$f33@tofu.alt.net>
Reply-To: kbigelow@www.play-hookey.com
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Jim Rosemary wrote:
> 
> In article <5804t1$63s@tofu.alt.net>, Jim Rosemary <jdr@magpage.com> wrote:
> >I created a boot floppy using the following:
> >
> >dd if=/cdrom/floppies/boot.flp of=/dev/fd0 bs=36b
> >
> >When uncompressing the kernel, I consistently get crc errors.
> >I suspected the floppy drive was bad and replaced it with another but the
> >problem persists. Any ideas?
> 
>  Solved my own problem - the hardware is junk. I had to reduce the
> CPU clock speed to 100 Mhz from 133 Mhz. Unfortunately I can't just
> reduce I/O speed with the BIOS. Now I get as far as "Welcome to
> FreeBSD" before the system hangs.

If you're running an ISA or ISA/VLB bus, check the clock divider in the
BIOS setup. Make sure that the ISA bus does not exceed 8.00000 MHz by
even a little bit. Actually, most peripherals will run at, say, 8.333,
but there are some that won't. When the data throughput becomes high,
any error will show up as a loss of synchronization. I first had this
happen to me with net cards running DOOM 2 deathmatch via IPX. Slowing
down the bus solved it.
-- 
Ken

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