sad when you think of all the cards that have been scrapped over the last 20 years for early PC Ed# In a message dated 8/14/2016 10:55:54 P.M. Pacific Daylight Time, cclist at sydex.com writes: On 08/14/2016 10:15 PM, Fred Cisin wrote: I think that the switches mostly relate to output configurations; that is, they don't change the basic operation. For example, the "monochrome composite" is probably just luminance, blank and sync (VBS), whereas the "color composite" is the complete CVBS signal. I suspect that setting either of the two composite modes probably disables the output at the DE-9. It would be interesting to see what other combinations of switches produce something useful. Of course, this is all wild-hare speculation on my part, as I don't have anything like this card sitting in my hellbox. FWIW, Chuck