Used in newer iterations or parallel port versions. The universal CH38X Driver Package supports various PCIe-to-Serial and Parallel configurations.
The is a specific printed circuit board (PCB) model commonly found in PCI Express (PCIe) expansion cards . It is used to add legacy communication ports, such as Serial (RS-232) or Parallel (LPT) ports, to modern desktop computers. Device Identification & Drivers Pi40952 3x2b Driver
Three motors mean differential drive (two wheels) plus one extra for an arm, gripper, or pan-tilt mechanism. It eliminates the need for two separate dual H-bridge modules. Used in newer iterations or parallel port versions