On 2020-05-10 05:30 PM, Karen Lewellen via talk wrote:
May I ask a side question here? On a couple of other lists to which I belong, one of which involves the development of the freedos project, there were questions about how a USB to serial adapter manages the communications associated, by which a mean port definitions that a serial port used to use. If one is trying to access a device connected with a USB to serial adapter, what port does USB use? for example if the program would talk to a serial device on com 4, how would you achieve the same goal via a USB to serial adapter? thanks, Kare
That depends on the OS. I have a ThinkPad, with 3 USB ports. With Linux, it doesn't matter which port I use, the adapter gets the same port number, such as /dev/ttyUSB0, which implies it's tied to a specific adapter. On the same computer, with Windows 10, the com port number depends on which USB port the adapter is plugged into. I have never used any USB device with FreeDOS or any other DOS.