Microsoft KB Archive/49719

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Paintbrush Using Extended/Expanded Memory

Article ID: 49719

Article Last Modified on 11/16/2006


  • Microsoft Paintbrush

This article was previously published under Q49719


The "User's Guide" for Microsoft Paintbrush version 4.0 states on pages 3-4 that Paintbrush uses extended/expanded memory. This is true only if you use the extended/expanded memory as a RAM drive.


The Paintbrush documentation states that Paintbrush takes advantage of extended/expanded memory. This suggests that Paintbrush creates images that use the extended/expanded memory. This is not true; the only way Paintbrush can use extended/expanded memory is if this memory is set up as a RAM disk. This drive speeds up the use of cutting, pasting, and many of the other editing functions.

To set up extended or expanded memory as a RAM disk, you must use either VDISK.SYS, RAMDRIVE.SYS, or a similar RAM disk driver. Instructions on using these drivers to install a RAM disk are available in your MS-DOS manual.

Once the RAM disk is created add the following line to your AUTOEXEC.BAT file:

   set tmp=n:

where n represents the letter that was assigned to your RAM disk.

Additional query words: 4.0 mouse paint brush docerr noupd

Keywords: KB49719