Hi,     I tried the alpha load disk with @HiassofT's atariserver at HSIO rate 10, and it worked without issue (so the Raspberry Pi hardware is good):   atariserver -S 10 -C sd/test_alpha.dd.atr   When I tried the original and high speed+zx0 autoruns, neither could load the Alpha Load disk, and both seemed to have problems loading the FujiNet config program.  I had already set the HSIO value to 10 in the web-page.   Logs attached of both attempts: