I note in some photos there's a 40 pin connector on top of the Edison (opposite face to the 70 pin DF40 underneath)
eg OLED Display + Edison Breakout Board + Node.js
What signals does this 40 pin connector connect to?
The 40 pin connector provides a JTAG (hardware debug) interface. However, all of the production Edison modules I have seen do not have the header populated (and there is a sticker where the header would be).
Retrieving data ...