User`s guide

Communications 13
Parallel Printer Port
This port, labeled “PAR,” is designed for connection to a parallel
printer, which has a Centronics interface with a 25-pin D-shell
female connector. This port, unlike the others, is a uni-
directional device—it only serves to output data to the printer
and cannot receive data. The pins and signals supported are
shown below:
Parallel Port Pin Assignments
* These signals are held high, in an inactive state.
If you have opted to use a parallel printer, but it is not
connected, an error message will appear on the status line
when any PRINT operation is done. To clear the message,
press Ctrl-Shift-Tab.