The safest and most reliable source is the official Nanjing Qinheng Microelectronics website.

The approach for Linux is different. The CH382L is supported in two ways.

Many older CNC software programs or industrial tools require the parallel port to occupy a specific legacy input/output (I/O) address, traditionally 0x378 or 0x278 .

The most reliable source for the driver is directly from the manufacturer, Nanjing Qinheng Microelectronics (WCH). Downloading from the official site ensures you get a version that is safe, up-to-date, and signed by Microsoft.

WCH CH38XDRV.EXE (Ch382/Ch384 Driver Pack) Supported Operating Systems

Once you've downloaded the driver, follow these steps to install it:

Download the ZIP version of the driver and extract it to a folder on your desktop. Press Windows Key + X and select .

In Device Manager, right-click the WCH Parallel Port and go to > Resources . Note the I/O Range value.

With a functional driver, the WCH CH382L becomes a powerful tool for various applications.

The official driver for the WCH CH382L (a PCI-Express to dual serial and parallel port chip) is the CH38XDRV.EXE

The WCH CH382L is a PCI-Express (PCIe) bridge chip from Nanjing Qinheng Microelectronics (WCH). It is a low-cost solution for adding legacy parallel (LPT) and serial (COM) ports to computers that lack them. Many PCIe expansion cards sold online under various brand names use this chipset, often as a "PCIe to 2x RS232" serial card or a "PCIe Serial + Parallel" combo card.

Supported (requires compiling the Linux driver module provided in the WCH package). Verifying a Successful Installation

Unlike its sibling (the CH382), the L variant is often found on single-port parallel cards. It functions as a translator, taking high-speed PCIe signals and slowing them down to the steady, rhythmic beat of the IEEE 1284 protocol.

This error usually indicates a hardware seating issue or a resource conflict. Try moving the CH382L card to a different PCIe slot on your motherboard and reinstalling the driver. If you need help with a specific issue, tell me: Your version (e.g., Windows 11 64-bit) The error message or code you see in Device Manager

Click download to save the compressed ZIP file or direct executable to your local drive.