When I place a QDR yellow block in a ROACH model, the "data out" port is 36 bits wide. In a ROACH2 model, the QDR "data out" port is 72 bits wide. The "data in" port seems to double in expected width as well on ROACH2 as compared to ROACH.
Why the dramatic interface change for ROACH2? Are the data ports on the ROACH2 QDR chips really twice as wide as on the ROACH QDR chips or has the QDR use pattern changed for ROACH2 or ??? Thanks, Dave