# How to send trigger via parallel port I/O on Windows 7/64bit

**URL:** <https://psychtoolbox.discourse.group/t/how-to-send-trigger-via-parallel-port-i-o-on-windows-7-64bit/2067>\
**Category:** Uncategorized\
**Created:** [March 2, 2017, 2:01pm UTC](https://psychtoolbox.discourse.group/t/how-to-send-trigger-via-parallel-port-i-o-on-windows-7-64bit/2067 "2017-03-02T14:01:04Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![he\_qing](https://avatars.discourse-cdn.com/v4/letter/h/8dc957/32.png) [@he\_qing](https://psychtoolbox.discourse.group/u/he_qing)\
**Post date:** [March 2, 2017, 2:01pm UTC](https://psychtoolbox.discourse.group/t/how-to-send-trigger-via-parallel-port-i-o-on-windows-7-64bit/2067/1 "2017-03-02T14:01:04Z")

</div>

Hi,  
I am an EEG newbie.Recently I want to impliment an EEG expriment on my 64 bit Windows 7 PC.  
I try to use the methods introduced in [https://github.com/Psychtoolbox-3/Psychtoolbox-3/wiki/FAQ:-TTL-Triggers-in-Windows](https://github.com/Psychtoolbox-3/Psychtoolbox-3/wiki/FAQ:-TTL-Triggers-in-Windows) and [http://apps.usd.edu/coglab/psyc770/IO64.html](http://apps.usd.edu/coglab/psyc770/IO64.html)  
  
However, it alway informs me that there is an error when initializing the _inpoutx64_ system driver.  
  
So how to solve this problem?  
Is there an alternative solution?  
  
Thank you!  
  
He, Qing

---

<div class="post-metadata">

**Author:** ![qx1147](https://avatars.discourse-cdn.com/v4/letter/q/b4bc9f/32.png) [@qx1147](https://psychtoolbox.discourse.group/u/qx1147)\
**Post date:** [March 7, 2017, 3:30pm UTC](https://psychtoolbox.discourse.group/t/how-to-send-trigger-via-parallel-port-i-o-on-windows-7-64bit/2067/2 "2017-03-07T15:30:23Z")

</div>

Your description of the problem is a bit too unspecific to tell, but alternatively you could try the parPulse solution (http://display-corner.epfl.ch/index.php/TachistoscopeSoftware). I just added the link also to the FAQ (https://github.com/Psychtoolbox-3/Psychtoolbox-3/wiki/FAQ:-TTL-Triggers-in-Windows#alternatives).  
  
However, parPulse also relies on the Inpout driver, so the Inpout driver needs to be correctly installed, which I never had problems with. Make sure that you didn't miss any of the installation steps.   

  
  
---In psychtoolbox@yahoogroups.com, \<he\_qing@...\> wrote :  
  

Hi,  
I am an EEG newbie.Recently I want to impliment an EEG expriment on my 64 bit Windows 7 PC.  
I try to use the methods introduced in [https://github.com/Psychtoolbox-3/Psychtoolbox-3/wiki/FAQ:-TTL-Triggers-in-Windows](https://github.com/Psychtoolbox-3/Psychtoolbox-3/wiki/FAQ:-TTL-Triggers-in-Windows) and [http://apps.usd.edu/coglab/psyc770/IO64.html](http://apps.usd.edu/coglab/psyc770/IO64.html)  
  
However, it alway informs me that there is an error when initializing the _inpoutx64_ system driver.  
  
So how to solve this problem?  
Is there an alternative solution?  
  
Thank you!  
  
He, Qing