Send different markers for different randomly appearing stim

[cblaison]

Hi all..me again

It is about the same prog (please see my last mail for a description
of the prog), but another question. Please download the prog here:

https://docs.google.com/leaf?id=0Bw6aNdKBxq4tM2JlOGE4N2ItNmY1Ni00MDY3LWJmMDctMzY2YTg2MWNmYjdl&hl=en&authkey=CNeUqe8C

I make psychophysio measurement, so I have to synchronize what is
triggered by eprime with the physiological data of the participants.
What I do is sending a signal through the port of the computer to mark
in the physio what type of stim is presently shown by eprime. For
example:

write port &378, 2
sleep 50

write port &378, 0
sleep 50

What I would like to do is to send a different signal (thus place a
different marker) for the different face stimuli of my prog. Problem
is that the faces appear randomly, so eprime has to note which face is
selected and send the corresponding signal through the port (for
example if "211.tif" than send "4" through the port, if "221.tif" than
send "8" through the port, etc..) Can someone please help me? Thank
you very much

cheers,
christophe.

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