Certain R2-based PC cards may be incorrectly enumerated as
memory cards (MTD-0002) if the PCMCIA CIS window was mapped in a high range
(greater than 0xFF000000 in the system physical memory). Also, the card may not
function correctly if it was assigned a memory resource in that range.
This behavior is caused by a bug in the Pcmcia.sys module.
Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain the latest Windows 2000 service pack
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain the latest Windows XP service pack
Windows 2000 hotfix
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows 2000 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note
In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone
tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
08/28/2001 02:33 P.M. 34,772 ntdetect.com
11/26/2001 07:39 P.M. 5.0.2195.4689 59,216 pci.sys
04/13/2002 05:52 P.M. 5.0.2195.5581 109,488 pcmcia.sys
Windows XP hotfix
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table.
Date Time Version Size File name
04/16/2002 11:27 A.M. 5.1.2600.42 115,584 PCMCIA.SYS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows 2000 Service Pack 4. This problem was first corrected in Windows XP Service Pack 1.
The bug mentioned in the "Cause" section of this article
occurs because the math that was used to compute values to address the memory
window (CIS or common) was flawed. The "base" value of the memory window that
needs to go into a host controller window register is the offset of that window
in the system physical memory minus the window offset on the PC card. However,
care was not taken to avoid a carry into the twenty-fourth bit position. This
occurs only with certain values of physical memory positions, and it also
depends on the memory window offset on the card. Additionally, it appears to
affect only certain PC cards. Note
This issue does not occur if the memory window (CIS or common)
was mapped somewhere within the first megabyte of the system physical memory,
which is the preferred resource request range for the memory windows of R2
cards. But this mapping itself may cause other problems in card installation
(generally error code 12) if there are not enough memory resources in that
range of the physical memory (A0000 through FFFFF).
The first megabyte of system physical memory is typically
divided as follows:
- 0 through 9FFFF: Reserved
- A0000 through DFFFF: Used to map ROMs of devices with ROM
onboard. Also used to map memory windows for earlier versions of
- E0000 through FFFFF: Used to map the System BIOS. Some
smaller BIOS systems use a smaller range.
For more information about how to obtain a hotfix for Windows 2000
Datacenter Server, click the following article number to view the article in the Microsoft Knowledge Base:
The Datacenter program and Windows 2000 Datacenter Server product
For more information about how to install multiple hotfixes with a
single reboot, click the following article number to view the article in the Microsoft Knowledge Base:
How to install multiple Windows updates or hotfixes with only one reboot