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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!pipex!warwick!dcs.warwick.ac.uk!cae
- From: cae@dcs.warwick.ac.uk (Charles Elliott)
- Subject: AMI BIOS Shadowing problems (again!)
- Message-ID: <1993Jan25.130101.14684@dcs.warwick.ac.uk>
- Sender: news@dcs.warwick.ac.uk (Network News)
- Nntp-Posting-Host: stone
- Organization: Department of Computer Science, Warwick University, England
- Date: Mon, 25 Jan 1993 13:01:01 GMT
- Lines: 32
-
-
- I posted something about this a week ago, but got no replies. Here is the
- current situation.
-
- I have a 486/33 with 8Mb, SIS chipset and AMI BIOS dated 07/07/91. When
- I boot up, the memory test only tests to 8064 Kb (a loss of 128Kb). Okay,
- so this is for shadowing. In the setup, there is no option to turn BIOS
- shadowing on or off specifically, but there is an option saying 'Shadowing
- Option', and the BIOS help says that all shadowing is disabled if this option
- is disabled. Despite disabling this, the memory only test up to 8064. Despite
- this, I can turn video and other 32Kb shadows on, but even with them all
- enabled (and the shadowing option enabled) I still only lose 128Kb. Regardless
- of all settings (shadowing on or off, all or no other blocks shadowed), MSD
- tells me that 32Kb at C000 is taken for ROMS (I assume for the video) and
- 64Kb is taken at the top of the 1Mb (for BIOS code?) and also, 8Kb is taken
- (I think at D800) for the BIOS on board my cacheing IDE controller.
-
- This shadowing control problem (or complete lack of it) seems to be an
- AMI BIOS bug!! Has anyone else come across it.
-
-
- Thanks in advance (somebody must know some answers!)
-
- Charles
-
- ---
- Charles Elliott E-Mail:cae@dcs.warwick.ac.uk
- Department of Computer Science cstadbt@csv.warwick.ac.uk
- University Of Warwick
- Coventry CV4 7AL
- England
-
-