🚀 go-pugleaf

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

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 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