ReadPort procedure
Read data from a PC port.
Declaration
procedure ReadPort(Port: LongInt; var Value: Byte)Description
ReadPort reads one Byte, Word or Longint from port
Port into
Value.
Note that you need permission to read a port. This permission can be set by the root user with the FpIOPerm call.
Errors
In case of an error (not enough permissions read this port), runtime 216 ( Access Violation) will occur.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.