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From: fredch@starlite.hf.intel.com
Newsgroups: comp.sys.laptops,comp.sys.ibm.pc.misc,comp.binaries.ibm.pc.d
Subject: Re: **** PHEONIX 386 BIOS QUESTION IN MY ZEOS LAPTOP! ****
Message-ID: <833@intelhf.hf.intel.com>
Date: 28 Sep 90 15:31:46 GMT
References: <1990Sep26.233311.8081@ux1.cso.uiuc.edu> <1990Sep28.031257.5187@karnak.uucp>
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Organization: Intel Corp., Development Tools Operation, Hillsboro, OR
Lines: 16

Various BIOS seem to handle the 384K between 640K and 1M in different ways.
My 386DX system at work has Phoenix BIOS, uses the 386K for shadow, period.
However, my 386SX at home has AMI BIOS.  It permits me to select portions
of the 384K for shadow (in chunks of 128K) and lets me map the leftovers
into extended memory.  Hence, the 2MB is split thus:

	 640K base
	 256K system and video BIOS shadow
	1152K extended (of which 128K is mapped from the 384K)

Btw, the BIOS call that returns the amount of extended memory also says 1152K,
so things look pretty shipshape.
----------
Fred Christiansen, Intel, JF1-67   503-696-4214 |  fredch@starlite.hf.intel.com
5200 NE Elam Young Prkwy, Hillsboro, OR  97124  | uunet!intelhf!starlite!fredch
Children spell love this way:  t-i-m-e.  "Quality time" must be in quantity.