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A software-based virtual serial port presents one or more virtual serial port identifiers on a PC which other applications can see and interact with as if they were real hardware ports, but the data sent and received to these virtual devices is handled by software that manipulates the transmitted and received data to grant greater functionality.
Having serial port support as provided by BNU and other similar drivers allowed the communications software programmers to spend more time on the actual applications instead of the depths and details of how to talk to the serial ports and the modems connected to them. Sending communications data across a modem link was a lot more involved than ...
This virtual COM port can be accessed and used as if it was a built-in serial COM-port. However, the characteristics of the virtual COM-port are not exactly the same as a real internal COM port, mainly due to data latency ; which means that if very sensitive and precise data transfer is required, the USB to serial adapter might be unreliable ...
Attempts by the guest operating system to access the hardware are routed to the virtual device driver in the host operating system as e.g., function calls. The virtual device driver can also send simulated processor-level events like interrupts into the virtual machine. Virtual devices may also operate in a non-virtualized environment.
COM port (DE-9 connector). COM (communication port) [1] [2] is the original, yet still common, name of the serial port interface on PC-compatible computers. It can refer not only to physical ports, but also to emulated ports, such as ports created by Bluetooth or USB adapters.
A virtual null modem is a communication method to connect two computer applications directly using a virtual serial port. Unlike a null modem cable, a virtual null modem is a software solution which emulates a hardware null modem within the computer. [6] [7] All features of a hardware null modem are available in a virtual null modem as well ...
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ttyS: (platform) serial port driver ttyUSB : USB serial converters, modems, etc. The canonical list of the prefixes used in Linux can be found in the Linux Device List , the official registry of allocated device numbers and /dev directory nodes for the Linux operating system.