🚀 go-pugleaf

The reason for the slowdown is MS-DOS 5.0's use of UMBs.  Check your
EMM386.SYS line in your CONFIG.SYS.  You CAN'T use the NOEMS switch as the
DOS extender in AutoCAD will bomb.  However, if you DON'T use the NOEMS,
then DOS 5.0 will create simulated EMS memory of at least 64K.

AutoCAD looks first for EMS memory, and if I read the docs right, will
ignore XMS (extended) memory if it finds EMS.  Therefore, if you use
EMM386.SYS, convert ALL (or as much as you can possibly spare) your XMS
memory to EMS.  

Your next choice is to not use EMM386.SYS at all (i.e., don't load DOS into
high memory and don't use UMBs at all - only use conventional memory). 
Then AutoCAD can access all your XMS as XMS.

Finally, you could purchase the Windows extension to AutoCAD and run it as
a Windows 3.x application with speed reduction (but not as slow as you
mention).

I installed AutoCAD v11 and Windows 3.0 (which perfers NOEMS, and XMS) on a
machine and had to compromise the performance of both to run them under the
same CONFIG.SYS.

Fun isn't it?

-- Via DLG Pro v0.995

jim_johnson@abcd.houghton.mi.us
from Calumet, Michigan, USA -the world's former copper mining capital, 
located on Lake Superior and home to America's newest National Park,
** The Keweenaw National Historic Park **