At just 44 grams, it's the second lightest adapter on this list ... a USB device that plugs into the USB port, or alternatively it can take the shape of PCIe - a Peripheral Component Interconnect ...
Xilinx provides a 7 Series FPGA solution for PCI Express® (PCIe) to configure the 7 Series FPGA Integrated Block for PCIe and includes additional logic to create a complete solution for PCIe. This ...
PCI Express offers high flexibility by supporting multiple physical links (“lanes”) combined into a single logical link for increased bandwidth. This way, the same protocol provides optimal solutions ...
However, [CircuitValley] found some IBM RS-485 boards that are little more than a PCIe board with an Intel FPGA onboard. These are widely avaiable on the surplus market for around $20 shipped.