On 12/4/17 12:17 PM, drlegendre . wrote: > Is there an old-fashioned schematic in those files? > Nothing is popping out at me. <https://github.com/John-Nagle/ttyloopdriver/blob/7bc53daa01a3cae08989dfaa7493b284ef94c354/board/ttydriver01.png> -- "I am a river to my people." Jeff-1.0 WA6FWI www.foxsmercantile.com