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Q96093
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1993-06-05
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ARTICLE-ID:Q96093
TITLE :Manifest Shows EMS Memory with NOEMS Switch
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The information in this article applies to:
- Microsoft MS-DOS operating system version 6.0
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Summary:
Quarterdeck's Manifest program shows that there is expanded memory
specification (EMS) memory, even if EMM386.EXE is loaded with the NOEMS
switch. If the NOVCPI switch is added to the EMM386.EXE line in the
CONFIG.SYS file, Manifest will no longer show any EMS memory.
More Information:
EMM386.EXE is a VCPI provider even when the NOEMS switch is specified.
With VCPI support enabled, EMM386.EXE supplies an upper-memory frame
buffer for the VCPI applications to use. When an application checks for
EMS memory it may see this buffer and believe it to be an EMS page
frame, thus reporting that EMS memory is available when in actuality it
is not. When the NOVCPI switch is added, it disables this upper-memory
buffer, thus disabling what the application is seeing as EMS.
This is a functional change in MS-DOS 6.0. To make EMM386.EXE perform
like it does in earlier versions of MS-DOS, both the NOEMS switch and
the NOVCPI switch are required.
Manifest is manufactured by a vendor independent of Microsoft; we make
no warranty, implied or otherwise, regarding this product's performance
or reliability.
Additional reference words: 6.00