This error usually points to a resource conflict or an incompatible driver version (often caused by trying to run a 32-bit legacy driver on 64-bit Windows 10/11).
Completely uninstall the driver, reboot into your computer's BIOS/UEFI, ensure "PCI Interrupt Steering" or "Plug and Play OS" options are optimized, and reinstall the latest certified 64-bit driver from the manufacturer. Issue: Buffer Overrun / Data Corruption
Drivers for Oxford/PLX 16C95x cards are available from various manufacturers (like StarTech, Sunix, or Siig) who use these chips. Method A: Direct Driver Download (Recommended) 16c95x serial port driver
: Once installed, you can modify COM port assignments and performance settings via the Port Settings > Advanced tab in the device properties. specific download link for a particular hardware model or operating system? Resolved: Windows serial port driver problem - Mbed
Use the Advanced Port Settings in Windows Device Manager to manually reassign the COM Port Number to an open, lower designation (like COM1 or COM2), even if Windows warns that it might be in use by a phantom device. Conclusion This error usually points to a resource conflict
: Once installed, the device should appear under Ports (COM & LPT) as "Oxford PCI Express UART" or "High Speed Communications Port." Linux
Solution: This is often caused by a failure in the driver's "bus enumerator." Reinstall the master PCI driver package provided by the card manufacturer, rather than updating individual ports manually. Conclusion Method A: Direct Driver Download (Recommended) : Once
The original reference drivers from Oxford Semiconductor provided support for :