The information in this article applies to:
SUMMARY
Windows NT detects up to 4 gigabytes (GB) of RAM, but if you are using a
computer with more than 64 megabytes (MB) of RAM, Windows NT may detect
only up to 64 MB. This behavior is based on how the BIOS returns the amount
of memory to Windows NT. Even though the BIOS may correctly display memory
above 64 MB, it may not pass this information correctly to Windows NT.
NOTE:The AST Manhattan may display this behavior and may require updating the EISA configuration by running the EISA configuration utility. AST Manhattan machines may also require disabling video memory range in BIOS in order for NT to report the actual amount of memory (RAM) installed.MORE INFORMATION
Windows NT supports only memory the BIOS reports using INT 15, 88H, E801H,
and E820H. Depending on how the BIOS reports memory is how Windows NT will
recognize it. If the BIOS is using INT 88H, it can only support up to 64 MB
RAM. If the BIOS is using INT E801H can support more, but it can only be in
three ranges: 0 - 640K, 1 MB - 16 MB, 16 MB and up. For the BIOS to support
INT E801H, INT 88H can only support up to 16 MB. This may be a problem,
since it means that some existing applications or products only see 16 MB
of memory on computers with more than 64 MB. Also, supporting E801
typically means the manufacturer of the computer ships a TSR that turns off
INT E801 and allows INT 88H to return 64 MB.
Additional query words: prodnt INTEL PCI
Keywords : kbhw nthw |
Last Reviewed: January 20, 2000 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |