LIM 3.2 Expanded Memory
To create a LIM 3.2 expanded memory page frame, you need to have a 64K
contiguous block of memory available in the UMA. Using four-digit hex
notation, a 64K block is equal to 1000h of memory (for example, E000h
to EFFFh, or C800h to D7FFh). If you have a 64K block available in the
UMA, the default values for EMM386.EXE will automatically create a LIM
3.2 page frame. Assuming that the HIMEM.SYS and EMM396.EXE files are located in the root folder, your CONFIG.SYS file should contain the following lines:
This will create a default of 256K of expanded memory. If you use the
include or exclude switches (i=<mmmm-nnnn>, or x=<mmmm-nnnn), you may
also need to specify the starting location of the page frame using the
m<n>, frame=<nnnn>, or /p<nnnn> switches.
LIM 4.0 Expanded Memory
If you don't have a full 64K contiguous block available, you can
create up to four LIM 4.0 expanded memory pages using 16K blocks of
the UMA. Please note that these pages will not be LIM 3.2 compatible.
Using four digit-hex notation, a 16K block is equal to 400h of memory
(for example, D000h to D3FFh). Use the p<n>=<mmmm> switch to specify
the location of each block. For example, you could use the following
lines in your CONFIG.SYS to create four LIM 4.0 pages:
DEVICE=EMM386.EXE RAM i=C800-CFFF p0=C800 p1=CC00 p2=E000 p3=E400
Note: The address ranges used here are for demonstration purposes
only. These address ranges may not work on your computer. Consult your
hardware documentation to determine the address ranges used by your
See pages 606-607 of the version 5.0 "Microsoft MS-DOS User's Guide
and Reference" for more information on these switches.
For more information on this subject query on the following words:
(c) Microsoft Corporation 2000, All Rights Reserved. Contributions by Kevin Zollman, Microsoft Corporation.