Network expansion method for application software based on serial device and self-service terminal
A technology of application software and self-service terminal, which is applied in the field of computer communication, can solve the problems of poor security and high cost, and achieve the effect of high cost, low cost performance and non-destructive upgrade
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[0033] The virtual serial port is a software serial port (COM port) fabricated out of thin air at the operating system level using the virtual driver technology of the operating system. Compared with the hardware physical serial port (COM1, etc.) of the computer itself, the virtual serial port does not really exist, but from the operating system It can also be seen, set and used in the hardware device manager of . All computer application software can use the virtual serial port as the hardware serial port. For the serial port application software, there is no difference between the virtual serial port and the hardware serial port.
[0034] The purpose and significance of using a virtual serial port instead of a physical serial port is to change the traditional inherent mode of data transfer from software to hardware of the serial port (COM port), making it a de facto software-to-software transfer, so that the serial port application software can be conditionally The communica...
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