How to use the printer buffer to operate the serial port in the risk operating system

摘要

A typical operating system supports two serial ports. However, the risk operating system (RISC OS) can only support one serial port and can not mount the device on the other serial port. In order to do this, it is virtually impossible to modify the inside of the risk operating system.;Accordingly, in the present invention, in order to solve such a problem in the risk operating system, in a risk operating system that allows both of the serial ports to be used simply and conveniently by using resources supported by an operating system (OS) called a printer buffer of a risk operating system, To provide a method of driving a serial port.