Thanks Eddy, looks just like what my version is. I now suspect our differences come from you using an ethernet smoothstepper and me using a parallel port. I have a strong suspicion that the PC is filtering some voltage via the P/port that the BD679 is seeing. I can confirm that by taking the p/port cable off the BOB and the LED goes out. Of course I can't then test Pin 14 out. However, an ESS is in my immediate future (next week some time) so I will see if my gut feeling is correct.

Cheers
Bruce