beginners-question parallel port

[mrtj]

I have a beginners-question regarding my E-prime programming.
I want to send event-related triggers to BioPac and after doing some
research I figured that an Inline with the following should do the
trick:

Stimulus.OnsetSignalEnabled = True
Stimulus.OnsetSignalPort = &H378
Stimulus.OnsetSignalData = 1

Stimulus.OffsetSignalEnabled = True
Stimulus.OffsetSignalPort = &H378
Stimulus.OffsetSignalData = 0

However, it seems to me that I should define/open/set-to-zero the Port
at the beginning of my experiment first. Am I correct to assume, and
if do... how can I do this.

I hope you can help me out. Many thanks!
Maartje



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