Windows 98 RAM

  Stour23 08:26 10 Sep 2003

Changed the system.ini file [vcache] MinFileCache=524288 MaxFileCache=524288, then increased my RAM from 512mb to 1024mb, didn't work, Windows refused to boot up. Any further suggestions welcomed!

  Jester2K II 08:51 10 Sep 2003

Windows 98 doesn't like more than 512 mb RAM. Very unstable - better to stick to 512mb.

  Jester2K II 08:57 10 Sep 2003

The information in this article applies to:
Microsoft Windows Millennium Edition
Microsoft Windows 98 Second Edition
Microsoft Windows 98
Microsoft Windows 95

If a computer that is running any of the versions of Windows that are listed above contains more than 512 megabytes (for example, 768 megabytes) of physical memory (RAM), you may experience one or more of the following symptoms:

1.You may be unable to open an MS-DOS session (or command prompt) while Windows is running. Attempts to do so may generate the following error message:

There is not enough memory available to run this program.
Quit one or more programs, and then try again.
The computer may stop responding (hang) while Windows is starting, or halt and display the following error message:

2.Insufficient memory to initialize windows. Quit one or more memory-resident programs or remove unnecessary utilities from your Config.sys and Autoexec.bat files, and restart your computer.

The Windows 32-bit protected-mode cache driver (Vcache) determines the maximum cache size based on the amount of RAM that is present when Windows starts. Vcache then reserves enough memory addresses to permit it to access a cache of the maximum size so that it can increase the cache to that size if needed. These addresses are allocated in a range of virtual addresses from 0xC0000000 through 0xFFFFFFFF (3 to 4 gigabytes) known as the system arena.

On computers with large amounts of RAM, the maximum cache size can be large enough that Vcache consumes all of the addresses in the system arena, leaving no virtual memory addresses available for other functions such as opening an MS-DOS prompt (creating a new virtual machine).

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