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- Path: sparky!uunet!shady!kevin
- From: kevin@shady.UUCP (Kevin Smith)
- Newsgroups: biz.sco.general
- Subject: Re: BIOS shadowing, Re: Performance degradation under SCO UNIX
- Message-ID: <72@shady.UUCP>
- Date: 31 Dec 92 18:20:55 GMT
- References: <9212300958.aa07997@scoke.sco.COM>
- Organization: ShadeTree Software, Inc.
- Lines: 23
-
- In article <9212300958.aa07997@scoke.sco.COM> belal@sco.COM (Bela Lubkin) writes:
- :>
- :>(*) The boot program runs under BIOS. You will notice some performance
- :>difference in booting. Also, the VGA driver reads certain constants out
- :>of the VGA BIOS ROM when switching modes. The performance difference is
- :>insignificant.
- :>
- :>HOWEVER. Shadowing is implemented various ways, depending on the
- :>machine's BIOS. Some implementations of shadowing are actively harmful
- :>to UNIX and *must* be turned off. I always recommend turning all
- :>shadowing off if you are having any odd problems. If you are absolutely
- :>sure that it doesn't hurt your system, and you want the dots to move
- :>quickly at boot time, then turn it back on.
- :>
- :>>Bela<
-
- On my AMI bios you can relocate the RAM reserved for shadowing, thus
- giving me another 256K in the never ending battle for more memory.
- --
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- Kevin Smith | Voice - (+1) (908) 874-7980
- | Mail - ShadeTree Software, Inc., 192 Capricorn Dr. #10,
- | Somerville, NJ 08876, USA
-