Windows 95 and Windows 98 use memory differently than earlier versions of Windows. If you encounter unusual random problems in Windows 95 that you did not experience in an earlier version of Windows, your computer may have faulty memory.
This article describes how to use a RAM drive to test the memory in your computer and what to do if this does not solve the problems you are experiencing.
Microsoft RAMDrive is a memory-resident program that lets you use part of your computer&qt;&qt;s RAM as if it were a disk drive. By creating a RAM drive that uses most of your computer&qt;&qt;s physical RAM, you may be able to isolate the memory problem to a particular memory chip. To create a RAM drive using Windows 95, perform the following steps:
1. Restart your computer. When you see the "Starting Windows 95" message, press the F8 key, and then choose Command Prompt Only from the Startup menu.
2. Use any text editor, such as Edit.com, to add the following line to the Config.sys file
amdrive.sys 12288 /E
The value 12288 is derived from the following formula using the example above:
(16 * 1024) – 4096 = 12288 bytes
NOTE: The Ramdrive.sys line must follow the Himem.sys line, or the RAM drive may not function.
3. Save the Config.sys file and then restart your computer normally.
4. If the problems no longer occur, halve the value for
5. If the problems persist, there may be a problem in the memory above the high memory area (HMA) that Ramdrive.sys is not using. To test the memory above the HMA (starting at 1088K), remove Ramdrive.sys from the Config.sys file and add the following line to the Config.sys file
If you continue to have problems, one of the following situations may exist:
- The problems may be caused by memory within the 1088K of RAM that the RAMdrive and HIMEM statements cannot reserve for Windows 95. To test this, try new memory modules or switch the order of the RAM modules in your computer. If you are unfamiliar with this process, Microsoft recommends that you contact your hardware manufacturer for assistance.
- The problems may be caused by CPU cache RAM. Many new processors implement a method of optimization that uses motherboard and internal CPU cache RAM to increase performance and optimize data and code execution. This cache is used to offset the number of direct reads that are performed against main memory for frequently used data and code.
To test this, disable the internal and external CPU cache. For information on how to do this, please read your hardware documentation or contact your hardware manufacturer.