Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!uluru5!danielce
From: danielce@uluru5.ecr.mu.oz (Daniel Ake CAROSONE)
Newsgroups: comp.sys.zenith
Subject: SupersPort 286 memory.
Message-ID: <3909@munnari.oz.au>
Date: 4 May 90 07:29:54 GMT
References: <44029@iuvax.cs.indiana.edu>
Sender: news@cs.mu.oz.au
Lines: 32

I am puzzled about the memory configuration in the SupersPort 286.
Looking at the chipset on the motherboard, I can clearly see 1Mb
of memory chips, all connected.

In the SETUP facility of the MFM-200 monitor, the item referrring to 
addidtional memory says "the amount of memory above 1Mb"

However, when the MFM-200 boots, it says "Total Memory: 640Kb"

All attempts to find this memory by all sorts of means has failed, I
cannot get anything to use it, either as expanded or extended. The single
exception is using PC-Tools Deluxe Rev 4.24, which reports that I have
an EGA card with 256K of memory - blatantly untrue, but at least it found
*something*. Attempts to directly read locations in that memory space yield
mixed (usually bad) results.

I called Honeywell-Bull, who repair the machines here, and the tech was very
helpful, saying that, as he understood it, the extra memory was being used
to map video memory, but this could be configured out. How?

I currently run DOS 3.21, from Zenith. BIOS 3.37.

I am considering changing to run Xenix, mainly for novelty value. Has 
anybody else tried this? I do know that the laptop won't run Microsoft
MS-DOS, from experience it just won't boot it. It needs a modified DOS
from Zenith. Will it run Xenix, or do I have to use my desktop instead?

Does anyone, particularly at Zenith, have any info, the more technical the 
better? Another poster mentioned success at getting EMM to use that memory.

Thanks in advance
danielce@ecr.mu.OZ.AU