Hobbyists have written custom wrappers around the default WCH drivers to:
The driver is typically distributed as part of a package named or similar. Segment Destek ch351q parallel port driver
The CH351Q is a PCI Express to Parallel Port bridge chip made by WCH (Nanjing Qinheng Microelectronics). It’s cheap, readily available on Amazon/eBay, and works if you know the secret trick. Hobbyists have written custom wrappers around the default
: Supports SPP, PS/2, EPP, and ECP IEEE 1284 parallel port modes. : Supports SPP, PS/2, EPP, and ECP IEEE
. It is primarily used in PCI expansion cards to provide legacy communication interfaces, such as IEEE 1284 parallel (LPT) RS-232 serial (COM)
Manufactured by Nanjing Qinheng Microelectronics (WCH), the CH351Q is a PCI-to-Parallel port bridge chip. It is the silicon glue that keeps the 1990s alive inside modern motherboards. While it is often dismissed as a cheap "dongle chip," the driver ecosystem surrounding the CH351Q offers a fascinating look at how we force modern Operating Systems to speak a dialect they have long forgotten.
This is where the enters the story. It is a PCI-bus chip that creates a "virtual" parallel port. For a technician, finding the CH35XDRV.EXE driver package is often the final piece of a stressful puzzle. The "Plug and Pray" Era