TTLIO is a board-control-register, which can be used to set or read CPLD pin-states.
TTLIO can be found on most Keith&Koep baseboards which got a CPLD ( i.e. ConXS or i-PAN7)
C# Sample App
C#-Sample-Application with drvlib_app.dll Download: ttlio_sampleapp.zip
C++ Sample-Application with Streamed-Mode Driver Download: ttlio.zip