The is a reliable hardware solution for adding legacy hardware communication ports. It provides two high-speed physical RS-232 serial COM ports and one DB25 parallel LPT port over a standard 32-bit PCI slot.
Because these expansion cards lack modern automated installers, the standard executable setup file may fail or report that it cannot find the hardware. A manual installation ensures Windows forces the driver onto the correct PCI slot allocation.
Typically configured as either 2 Serial RS-232 ports (DB9), 4 Serial ports, or a combo layout of 2 Serial ports and 1 Parallel port (DB25 IEEE1284).
Select the driver file (often named CH35X.INF , NM98XX.INF , or similar matching vendor strings), click , and then click OK .
Based on the chipset identified, follow these sources:
I hope this guide has helped you identify your hardware and provided a clear path forward. Finding the correct drivers for older or specialized hardware can be a challenge. If there are other computer components or peripherals you're having trouble with, feel free to ask.
Extract the downloaded folder to your Desktop using a tool like 7-Zip. Open .
to a dedicated folder on the desktop. Open Device Manager and right-click the failing PCI device. Click Update driver . Choose Browse my computer for drivers .
Click , navigate to the folder you extracted on your desktop, and look for a file ending in .inf (e.g., netadapter.inf or mdmconex.inf ).
Based on available information, here are the most common driver versions found for various Windows operating systems:
- Links checked on 3 January 2026 - |
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- Links checked on 3 January 2026 - |
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- Link checked on 3 January 2026 - |
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The is a reliable hardware solution for adding legacy hardware communication ports. It provides two high-speed physical RS-232 serial COM ports and one DB25 parallel LPT port over a standard 32-bit PCI slot.
Because these expansion cards lack modern automated installers, the standard executable setup file may fail or report that it cannot find the hardware. A manual installation ensures Windows forces the driver onto the correct PCI slot allocation.
Typically configured as either 2 Serial RS-232 ports (DB9), 4 Serial ports, or a combo layout of 2 Serial ports and 1 Parallel port (DB25 IEEE1284).
Select the driver file (often named CH35X.INF , NM98XX.INF , or similar matching vendor strings), click , and then click OK .
Based on the chipset identified, follow these sources:
I hope this guide has helped you identify your hardware and provided a clear path forward. Finding the correct drivers for older or specialized hardware can be a challenge. If there are other computer components or peripherals you're having trouble with, feel free to ask.
Extract the downloaded folder to your Desktop using a tool like 7-Zip. Open .
to a dedicated folder on the desktop. Open Device Manager and right-click the failing PCI device. Click Update driver . Choose Browse my computer for drivers .
Click , navigate to the folder you extracted on your desktop, and look for a file ending in .inf (e.g., netadapter.inf or mdmconex.inf ).
Based on available information, here are the most common driver versions found for various Windows operating systems:
- Links checked on 3 January 2026 - |
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| Last update of this page: 2026-02-04 |
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