Editing QEMM (section)

=== Consequences of using or disabling EMS ===
[[Expanded memory|EMS]] memory normally uses a 64KB of UMB as the Page Frame, this reduces the total UMB available to DOS.  So some recommend turning off EMS, using the NOEMS switch, to increase the total UMB free by 64KB.  QEMM supports NOEMS switch, however, it is far better to provide EMS than saving the 64K Page Frame.<br />
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QEMM takes advantage of EMS memory and usually will create more free RAM in the lower 1M address space than the 64KB required for EMS.  QEMM StealthROM, SqueezeFrame, and Stealth D*Space all require EMS to work by mapping ROM and data buffers into EMS, thus freeing more UMB's.<br />
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QEMM's TechNote ''FRAME.TEC'' states: <small>''"Thus any advice to remove the page frame is penny-wise and pound-foolish.  Remember that the page frame is 64K of address space that can be used any program, at any time, to access effectively as much memory as it likes.  Some view the page frame as 64K of address space that could be used to hold up 64K of programs, but it is much more useful to consider the page frame as a place to access up to 32 megabytes of code and/or data for the programs that use it."''</small><ref>[http://www.chsoft.com/dv.html Quarterdeck Expanded Memory Manager QEMM 8.03 and QEMM 97] {{webarchive|url=https://web.archive.org/web/20060208042052/http://www.chsoft.com/dv.html |date=2006-02-08 }}, TechNote FRAME.TEC.</ref>