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WINDOWS.TEC
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1989-09-15
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DESQview 2.2 and QEMM 4.2 Technical Notes:
Microsoft Windows and Windows Applications
*** QEMM-386 4.2 ***
Using QEMM-386 4.2 with Microsoft Windows 2.1 and EXCEL 2.1
If you have QEMM.SYS in your CONFIG.SYS file, Windows 2.1 will
refuse to install itself. We have not found a conflict, and so
you should try to overcome this restriction. One way to do this
is to edit your CONFIG.SYS file so that the line:
DEVICE=QEMM.SYS {existing switches}
says instead:
REM DEVICE=QEMM.SYS {existing switches} EXT=64
Install Windows normally and then edit the QEMM line of the
CONFIG.SYS file to remove the REM statement before QEMM.SYS. If
the Windows installation has added a device called HIMEM.SYS to
your CONFIG.SYS file, move the line that specifies the HIMEM.SYS
driver so that it loads after QEMM.SYS. You SHOULD NOT reboot
the machine, so Windows install will see that you have expanded
memory. It is enough that the REM statement is put before the
QEMM line. After you install Windows, be sure to remove the REM
statment.
------------------------
QEMM-386 and Windows 386
Windows 386 and QEMM-386 are not compatible. This is because
Windows 386 does it's own memory management of the memory above
640K. You may however, run QEMM-386 with Windows 286 or Windows
Run-time programs (such as PageMaker) on a 386 machine and
Windows 286 can take full advantage of the memory provided by
QEMM. Operation in this fashion provides expanded memory for
programs whether they are running in Windows or not, while
providing full support for Windows 286's desire for EMS 4.0
compatible memory. The WIN86.COM program provided with Windows
386 is a subset of Windows 286 and can be run with QEMM-386.
----------------------------------------------
Using QEMM-386 4.2 with Microsoft Windows 2.03
Microsoft Windows 2.03 cannot tolerate more than 1 mappable area
larger than 48K, between 640K and 1MB. Use the QEMM.COM program
to see what areas are available above A000. If more than one
area larger than 48K is "Mappable", then you will need to use
either the EXCLUDE or RAM parameter to keep QEMM from reporting
more than 1 area larger than 48K to Windows. It's not necessary
to EXCLUDE or RAM all of the memory, just enough to make the
mappable memory sizes less than 48K. If you don't do this,
Windows will start but will not run any programs.
*** DESQview 2.2 ***
Running Windows 286 in DESQview:
First, you will want to set up Windows so that it does not
implement the HIMEM.SYS driver. This is because, the same memory
area that is used by Windows to obtain 60K of extra usable memory
will be used by QEMM to give 60K of extra memory for ALL windows,
not just the Windows window, so it makes sense to have QEMM
manage this memory. To bypass Window's use of the HIMEM.SYS
driver, you should install Windows as shown above and when it
comes to the section of the Windows install where it asks if you
"want to use extended memory for Windows", answer "No". Windows
will not install the HIMEM.SYS driver.
Your CONFIG.SYS file would not require the "EXT=64" parameter as
shown above, since the memory for HIMEM.SYS need not be reserved.
It is also possible to simply remove the HIMEM.SYS driver from
your CONFIG.SYS driver without reinstalling Windows. When
started in this fashion, Windows will always report an error
message saying "Your memory configuration has changed...", but
you can simply hit escape to continue, with no further problem.
In a sense, Windows and Windows applications run in DESQview
windows just as any other large graphics based applications do
and their installation can be approached from that stand-point.
Only Windows 286 (not Windows 386) can be run in DESQview and it
is important that Windows be operating in a display mode that is
supported by DESQview's video drivers and that you are able to
open a window with sufficient memory (approximately 450K), but
those are the only requirements.
Windows and many Windows applications are not shown as selections
on the DESQview Add a Program menu, but can be easily configured
by adding the "PageMaker" entry from Add a Program and then using
Change a Program, modifying the "Program Name", "Program" and
"Directory" fields to be correct for the specific application.
All other settings should be correct.
Please also note that you should use the "Maximum Expanded
Memory" field in Change a Program to limit the amount of expanded
memory the Windows application can take, or it will take it all.
This will cause unnecessary swapping to disk, even on systems
with large amounts of memory. Judging the amount to set as
maximum depends on the size of the data you have, but you should
be able to determine this by running the program and loading your
largest data file and see how much it takes.
* * * E N D O F F I L E * * *