This is an old revision of the document!
Both scanners are equipped with an 8-button 2-box device from Current Design Inc. This device has a separate response box for each hand, with 4 buttons on each box. You can use just one box if you only need 4 buttons, or both boxes for up to 8 response buttons.
The 8-button box is a USB device that functions like the number keys on a computer keyboard. The button keys send a number code that is identical to the codes sent when you press a keyboard number key. The buttons are coded: '1', '2', '3', '4' on one hand box, and '6', '7', '8', and '9' on the other box.
The '5' key is used for a scanner trigger code, but this option is not connected at BIAC because anytime the scanner is acquiring images the button box acts as though you are repeatedly pressing the '5' key on the keyboard, which can be very annoying. We have other input devices connected to the scanner trigger pulse.
Because the 8-button box behaves llike a keyboard you should not need to do anything special to configure your software to recognize the device. If the number keys on the computer keyboard work, the 8-button box should also work.
Previously the Wiki described how to connect and disconnect the 8-button box for use on different computers. That feature has been discontinued because we now use only one PC for stimulus programs. (disconnect)