I talked with our hardware area and they said it's more than likely that the response boxes you are using are not set up to send nor receive ttl signals. They function just like two other keyboards running in parallel. However, to confirm that, we would appreciate it if you could send a picture of any label on the bottom of the box to service@empirisoft.com, please include "case 13508" in the subject line of any such email.


Without getting into to too much detail, the reason you saw signals in the IOTest using the response boxes is because DirectRT still allows for any keypresses defined as ttl signals in an input file to also be entered as keypresses on any keyboard. For more detail, see "Receive a TTL signal on the following DirectRT manaual page: http://www.empirisoft.com/directrt/h...tl_signals.htm.


Finally, I did want to let you know that what you were trying to accomplish in your original post would be possible if you had external devices with ttl capabilities. However, any keyboard also hooked up to that computer would also be capable of entering input, so you would need to be aware of that.