Texas Instruments 51X - Manual (Page 29)

2.5.2 Installing External Parallel Printer
The Notebook is equipped with a bidirectional, ECC/EPP compatible, 25-pin
parallel printer port. The connector pinouts and connector location are
shown in Figure 2-6.
If you will be using a parallel interface, connect the 25-pin male connector
of your printer cable to the 25-pin female parallel port on your notebook.
Refer to the manual which accompanied your printer for instructions on
configuring your operating environment
Figure 2-6 Parallel Port Location/Pinouts
Installation 2-7