Really a software topic, but relevant to control:
I hear of problems with old instrumentation software using PC COM ports when it's used with a newer PC which emulates the port using a USB adaptor. Without any direct experience, I guess that the problem may be that the newer arrangement uses a driver that make the port acceessible through Windoze API calls (ie. looks like a file) rather than as a proper UART with standard I/O port mapping. No doubt a lot of the older software would expect a 'real' UART, accessing it via direct port read/write.
Is anyone aware of a robust solution to this problem, ie. a USB-based solution that presents on the OS side as a dinky-di COM port, that can be accessed like a real one? I've done a fair amount of googling and checking of product specs, nothing is particularly specific on the matter. Suppliers haven't been any help. TIA