Connect from my previous writings, when we set the bit with the previous way to the port that we want, then the state of other bits to be erased. For example, we want to set bit 0, but a fixed situation, but every bit we set using the command above, then the state of other bits will be 0. To handle these circumstances, we will discuss using Port_In function.
How to read data from parallel port is just as easy to send.
[Store_Variable] = port_in (Port_Address)
For example, if we want to get data from the PS (port 889), we can use the command:
Store_Variable = port_in (889)
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