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From: toms@oakhill.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Intel/Lotus EMS hardware/software
Message-ID: <838@oakhill.UUCP>
Date: Tue, 10-Feb-87 13:48:17 EST
Article-I.D.: oakhill.838
Posted: Tue Feb 10 13:48:17 1987
Date-Received: Wed, 11-Feb-87 19:41:15 EST
Organization: Motorola Inc. Austin, Tx
Lines: 26
Keywords: EMS

I am interested in any information that the net can provide me with about
the underlying hardware for the Intel/Lotus EMS standard.  I have been able
to ascertain that this bank switched protocol uses a 64K window in the
PCs memory map that is broken down into 4-16K sections.  This is where the
questions start:  

       Why are there 4 sections (or what ever they are called)?

       If one wanted to build their own hardware would 2 sections of 32K
           each be a serious draw back to work with?

       Does anyone know were one can get sources to an EMS driver either
           PD or commercial without buying the hardware?  (if no PD
           sources are available I will consider purchasing the software
           only).

       How big are the bank select registers?

       Where do they reside in the PC memory map?

Any answers to these questions would be greatly appreciated.
-- 
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Motorola Semiconductors                     Tom Spohrer
Austin, Texas                {seismo,gatech,ihnp4}!ut-sally!oakhill!toms