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Line Printing Terminal is the usual name on IBM Machines for a Parallel Data Bus at the computer designed to drive a Line Ascii Printer.

But today it can be used for a wider variety of devices.

It has an 8bit parallel databus, 4 Ports for control output (such as Strobe, Linefeed, Initialize, and Select In) and 5 Ports for control input (such as ACK, Busy, Select, Error, and Paper Out)

On IBM Machines LPT1 usually resides at 0x378, LPT2 at 0x278.

This Port is easy to use for self-made devices.

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