The is a "bridge" chip made by WCH (Nanjing Qinheng Microelectronics). In the world of industrial maintenance and retro-computing, the story of its driver is one of keeping the "ghosts of industry" alive on modern hardware. The Bridge Between Generations
If your CNC machine isn't responding, ensure the software (like Mach3 or LinuxCNC) matches the I/O address found in the Device Manager. LinuxCNC Forum Quick Tip: ch351q parallel port driver
: If using an older motherboard, ensure the PCI bus is enabled and "Plug and Play OS" is set to "Yes." CH351Q The is a "bridge" chip made by
The official driver package for the CH351 series is the utility. Official Download: CH35XDRV.EXE on WCH-IC.com Operating Systems Supported: Windows: 11, 10, 8.1, 8, 7, Vista, XP, 2000, ME, 98, NT4.0 Server: 2022, 2019, 2016, 2012, 2008, 2003 Other: DOS, Linux LinuxCNC Forum Quick Tip: Bios Settings : If
: The driver may assign a non-standard I/O address (e.g., something other than 0x378 ). You can find the assigned address in Device Manager -> Ports (COM & LPT) -> Properties -> Resources .