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Parallel Interface
C-6
Auxiliary output 1 (Pin 33)
This signal line is not used.
Power Ready (Pin 35)
This signal is high when the printer’s power is on.
Select In [NSelectIn] (Pin 36)
This signal is used in some versions of the Centronics interface to enable the computer to force the
printer on-line. In high-speed mode, it is used as an interrupt.