Parallel Port Configuration

The configuration of the LPT port consists of

  • Selecting the port's operating mode

  • Selecting the IRQ, I/O port address, and DMA channel (for certain modes)

For an overview of how IRQ, I/O port addresses, and DMA channels are used, seeHardware Resources,” p. 75.


As you prepare for the A+ Certification Exam, you should note that the parallel designation for the LPT port comes from its use of eight data lines (pins 2–9) and that the port has provisions for printer status messages (pins 10–12).

LPT Port Operating Modes ...

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