+3f8 typically designates the base [I/O address](/wiki/IO_Address) for the first [serial port](/wiki/Serial_Port) (COM1) on IBM PC compatible systems. This hexadecimal value is foundational for hardware [communication](/wiki/Communication), enabling early data exchange with peripherals.
+## See also
+- [COM Port](/wiki/COM_Port)
+- [Peripheral](/wiki/Peripheral)
+- [Hexadecimal](/wiki/Hexadecimal)
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