Microsoft KB Archive/73580

= Configuring AutoCAD 386 or AutoCAD Release 11 with MS-DOS =

Article ID: 73580

Article Last Modified on 5/12/2003

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APPLIES TO


 * Microsoft MS-DOS 5.0 Standard Edition
 * Microsoft MS-DOS 5.0a
 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q73580



SUMMARY
Autodesk's AutoCAD 386 running under MS-DOS version 5.0 or later may appear to either run very slowly or to hang the machine. AutoCAD 386 is a VCPI (virtual control program interface) program; it will access and use all of the extended memory on a system without the need for HIMEM.SYS.

AutoCAD 386 is the same product as AutoCAD release 11.



MORE INFORMATION
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 &quot;Dxfix / Newdx / B1_step&quot;. 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. -or-

  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:      device=c:\dos\himem.sys /int15=2048 -or-

  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. -or-

 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 &quot;AutoCad 386 Installation and Performance Guide&quot; 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.

Additional query words: 6.22 5.00 5.00a 6.00 6.20 autocadd auto cad 6.21

Keywords: KB73580

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