Alan,
Well, the goal is software compatibility with the original Softrock (to the extent possible).
But if this is too much of a challenge for me, I'll switch to some other approach.
I think CAT control is a more portable/multiplatform solution than ExtIO DLL. There are already programs to do this, for example one by WA6PZB:
I'll just need to port it to Attiny85 with a smaller Si5351A library and a different I2C. Maybe also do the quadrature output.
But then it is no longer a Softrock.
73, Mike AF7KR
