STB WIND/X Video Card Interferes with COM4 Serial Port

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.