Alan
Had a look back not too much on the subject.
Found driver https://github.com/ik1xpv/ExtIO_sddc/releases/download/v1.1/ExtIO_sddc_v1.1RC1.zip
No luck with SparkSDR but installed the DLL’s into HDSDR and that works and shows ExtIO with RX888mkII.
Just wondered if there is anyone out there that has this working.
Andrew