Microsoft KB Archive/102923

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STB WIND/X Video Card Interferes with COM4 Serial Port

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Q102923

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The information in this article applies to:


 * Microsoft Windows versions 3.1, 3.11

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SUMMARY
According to STB Systems, Inc., the STB WIND/X video card may conflict with the address of the COM4 serial port (2E8h). This article contains an excerpt from the "WIND/X Video Card" user's manual that describes the problem and workarounds.

MORE INFORMATION
The following text is from page 1-4 of the STB "WIND/X Video Card" user's manual:

The WIND/X graphics controller chip uses the hex port address 46E8 for one of its extended register sets. When only the first 8 bits of this 16 bit address are decoded in any operation, the address appears as hex port address 2E8, which is a popular hex port address for a COM 4 serial port. This may result in an address conflict and prevent COM 4 from functioning or cause it to operate in an unpredictable manner. (e.g., Windows losing text, COM 4 locking up)

If you have a COM 4, or any other device in your system that you suspect uses the 2E8h address, consult the device documentation for alternate address selection/configuration. For more information about the WIND/X video card, contact STB Systems.

The WIND/X products included here are manufactured by STB Systems, Inc., a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: hardware 3.10 Simply The Best

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Issue type :

Technology : kbWin3xSearch kbWin310 kbWin311