Gordon, Sep 30, 12:15
Built a new kernel for titans, with a two-line fix that I hope will fix the issue where pc104 interrupts cease to be serviced.
Installed it on Aph3 from Boulder, and rebooted it. It came up and data from the emerald serial ports 5,6,7 (as well as the sonic on 2) is coming in. Previously the issue was seen within an hour or two. Wait and see...