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- Path: sparky!uunet!sun-barr!ames!elroy.jpl.nasa.gov!usc!venice!gumby.dsd.trw.com!r3vm.dsd.trw.com!JWEST
- From: JWEST@r3vm.dsd.trw.com (Judson West)
- Subject: Re: When is an AMI BIOS
- Message-ID: <16843C042.JWEST@r3vm.dsd.trw.com>
- Sender: news@gumby.dsd.trw.com
- Organization: TRW Electronic Systems Group
- References: <IMER400.1.713805716@mrapp.ics.iupui.edu> <1992Aug14.160725.18416@bnr.co.uk>
- Date: Fri, 14 Aug 1992 20:40:16 GMT
- Lines: 47
-
- In article <1992Aug14.160725.18416@bnr.co.uk>
- adsb@bnr.co.uk (Andrew Benham) writes:
-
- >Date: Friday 14th August 1992
- >
- >not an AMI BIOS?
- >
- >We've several 486DX machines in the lab at work with AMI BIOSs. The features
- >provided by this BIOS (e.g. configurable NUM LOCK at start-up, drive boot
- >order chosen by user, and many others) was one of the reasons when I bought
- >my own 486DX that I specified an AMI BIOS.
- >
- >Now, my machine has an AMI BIOS in it, *but* it only implements a small
- >sub-set of the features of the machines in the lab. The two features
- >I give as examples as above are missing, as is a number of others.
- >
- >I'm slightly puzzled! I can understand that certain BIOS features (ROM
- >shadowing, memory wait states, etc) are functions of the chipset and
- >perhaps the motherboard: however I would have thought that the startup
- >NUM LOCK state (for example) could be user-configurable on any machine.
- >
- >I'm further confused in that looking through a "Buyers' Guide" for 486 PCs,
- >there are PCs listed with identical motherboards, identical chipsets, with
- >AMI BIOSs, *but* with different BIOS features.
- >
- >So I'm wondering whether I've been sold a pup? Looking through the BIOS ROM
- >area of memory, I can see all the text strings for the options that don't
- >appear. Is there perhaps a table of flags in the ROM which controls which
- >features are implemented in a particular ROM? Or do I need to buy a full-
- >spec AMI BIOS to get the extra features?
- >
- >Andrew Benham
- >(adsb@bnr.co.uk)
- >(also g8fsl@g8fsl.ampr.org [44.131.19.45])
-
- I believe that the BIOS, while many of them are written by AMI, are specific
- to the chipset used on your motherboard. AMI just enables what options are
- supported on your board and does not have to have specific code for every
- machine type.
-
- I'm sure I will be corrected if I'm wrong.
- -----------------------------------------------------------------------------
- | Judson West Phone: (310) 812-4394 |
- | VM System Programmer Internet: JWEST@r3vm.dsd.trw.com |
- | IBM Operating Systems IBMMail: IBMMAIL(USTRW001) |
- | TRW/Electronic Systems Group, One Space Park, Redondo Beach, CA 90278 |
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