On Fri, Oct 16, 2020 at 8:05 PM Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote: > get that ulx3s echo example i sent you to yesterday up and running > first. that will eliminate two unknowns. three. the other unknown: you have no idea if the FT232 USB-UART IC on the - new - ulx3s - is actually working.