Pinnacle - FAQs
All files and documentation are offered on an *AS IS* basis and you assume full responsibility for using them.
No digital audio 
If the digital I/O card is installed pointing in the wrong direction, the
digital audio may not work.  

Install the digital I/O board underneath the SIMM sockets on the card, 
covering the large socketed chip.

See also the article: Connections - Daughterboards