I was looking up various information last night about the Open Logic Sniffer, along with operating it with the wing and an external clock, and came up with
http://www.hp9845.net/9845/tutorials/an ... x.html#ols, which is reasonably in-depth. I was seeing some mention of pairing the OLS with an old HP 9845, for a triggering device, since I wasn't quite sure which piece of HP kit it was, and now I know.
On the upside, despite being catered for the HP 9845, it is a decent primer on working with a logic analyzer and also covers the wing in operation too.