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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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INP Function Details
 
Syntax
  INP(port)
 
The port must be an integer in the range 0-65,535. The INP function
complements the OUT statement.
 
The INP and OUT statements give a BASIC program direct control over
the hardware in a system through the I/O ports. These statements must
be used carefully because they directly manipulate the system hardware.