venky@pawl.rpi.edu (venkatesh ravirala) (08/30/90)
Hi Netters :
I'm using Overlays of TP5.5 installed on an AT&T workstation.
Following the code and examples presented in the reference manual(s)
I have successfully overlayed several units. But as expected the
execution has slowed down becuase I couldnot put overlays in the
Expanded Memory Specification (EMS). Use of OverInitEMS is giving the
error " EMS driver not loaded ". Then I executed the EMS.pas sample
program provided by TP5.5 and the programs halts with the message
" The LIM Expanded Memory Manager is not installed ".
I would like to know more about this LIM EMM. What it is? How to
and where to obtain it? etc.
I sincerely appreciate any help. Thanks.
with regards.
Venkatesh
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venky@pawl.rpi.eduffritze@hpwad.HP.COM (#Fromut Fritze) (09/04/90)
> I would like to know more about this LIM EMM. What it is? How to > and where to obtain it? etc. LIM is a specification for Expanded Memory controlled by an Expanded Memory Manager (EMM). Currently versions 3.2 or 4.0 are used. The method to access extra memory could be described as bankswitching, while 3.2 places a single 64k area above 640K and beyond 1M between adapters cards (e.g. VGA, LAN) and BIOS, version 4.0 adds bankswitching below 640K. Unless you own an 386, which is capable to simulate expanded memory by software only, your computer needs special hardware (either on mainboard or as standard slot card) to provide the switching hardware and additional memmory chips. This hardware will be controlled by a dedicated driver to be provided by the supplier of the hardware (as different hardware solutions, chipsets, registers are used). It will provide the standarized EMM interface toward your software. For 286 computers manufactured during the last two years, that hardware is probably available on the mainboard. ------------------------------------------------------------------------------ internet: ffritze@hpwadrd.hp.com hpdesk: Fromut FRITZE / HPB400 / R1 phone: Germany 7243 602296 address: Fromut FRITZE, Waldbronn Analytic Division R&D, Hewlett Packard Str, D 7517 Waldbronn 2, Germany ------------------------------------------------------------------------------