There are four ways to get AutoCAD 386 to run under MS-DOS 5.0 or later:
• If you are using release 11(c2), run the program NEWDX.EXE found on
the AutoCAD disk "Dxfix / Newdx / B1_step". This program updates
the Phar Lap 386/DOS-Extender. The new updated DOS-Extender allows
AutoCAD 386 to use the XMS memory that HIMEM.SYS provides.
NOTE: If you are also using EMM386.EXE, AutoCAD reverts to the
VCPI (as opposed to XMS) specifications for memory allocation. You
must use at least a 16K page (LIM 4.0) if you use EMM386.EXE.
• On the HIMEM.SYS line in the CONFIG.SYS file, specify /INT15=xxxx,
where xxxx equals the amount of memory you want to allocate to
AutoCAD 386. This parameter allows other memory schemes other than
the XMS to co-exist. For example:
Specify EMM386 to use expanded memory, which AutoCAD 386 can use as
well. Make sure HIMEM.SYS is loaded first. An example of choosing
expanded memory is
device=c:\dos\emm386.exe xxxx ram
where xxxx is equal to the amount of expanded memory you want.
Remove HIMEM.SYS from the CONFIG.SYS file altogether; however,
there are disadvantages to doing this. You will lose the capability
of loading MS-DOS high; also, you will not be able to load TSRs and
other programs in the UMA (upper memory area).
For more information on AutoCAD 386 (Release 11), refer to the
"AutoCad 386 Installation and Performance Guide" or contact Autodesk.
The products included here are manufactured by vendors independent of
Microsoft; we make no warranty, implied or otherwise, regarding these
products' performance or reliability.