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- Newsgroups: comp.unix.ultrix
- Path: sparky!uunet!ulowell!swlvx2!swlrgj!fct
- From: fct@swlrgj (Fred Thompson)
- Subject: Re: Software test of Floating Point Unit in 5000/240??
- Message-ID: <1992Sep11.140053.22132@swlvx2.msd.ray.com>
- Sender: news@swlvx2.msd.ray.com (NEWS USER)
- Organization: Raytheon Company, Tewksbury, MA
- References: <18o7urINNppv@darkstar.UCSC.EDU>
- Date: Fri, 11 Sep 1992 14:00:53 GMT
- Lines: 30
-
- In <18o7urINNppv@darkstar.UCSC.EDU> paul@aztec.ucsc.edu (Paul Tatarsky) writes:
-
- >A prof pointed out that the little code frag at the end of this
- >note was producing bad output on one of our 5000/240's and not on the
- >other ones. I checked the kernel for anything odd, and then the manuals,
- >and I have two questions:
-
- >1. What is the story with the EMULFILT option? Older manuals say don't
- >use it if you _have_ an fpu, newer ones say don't remove it from the
- >config file. Well, it wasn't in my config file and when I added it
- >and rebuilt/rebooted, I got the same results.
-
- >2. Anyone have a sure fire software test of the FPU unit?
-
- >What is going on here? Further configuration info available on request.
- >Eternal thanks to anyone with a solution.
-
-
- You probably have a bad floating point chip (FPU) and need to have DEC
- replace it. When these go bad, other things also show up as problems,
- like graphics programs can't draw circles any more, ntp can't keep
- the date correctly, etc.
-
- In regards to EMULFILT (I think it's EMULFLT), we leave it in and it doesn't
- seem to make a difference. I think the newer versions of the OS look to
- see if there is a FPU and then use the code if there isn't.
-
- --
- Fred Thompson, ...!ulowell!swlvx2!fct or fct@swlvx2.msd.ray.com
- Raytheon Co, Missile Systems Division, Tewksbury, Mass. 01876
-