Toshiba 120/150 Operator's Manual page 81

Connecting the parallel interface cable
1 Obtain an IEEE1284 shielded parallel interface cable.
2 Ensure that your computer and unit are turned off.
3
Insert the cable into the parallel interface connector
located on the rear of the unit, and fasten with clasps.
4 Insert the other end of the cable into the interface connector of your computer.
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INSTALL THE SOFTWARE