If one replaced the 1397 w/ a 1398 on the Compac F would your driver for CGminer work?
They appear pin compatible. Or are the comms too different?
I highly doubt a simple 'drop-in' replacement is possible. Looking at older chips data sheets it is obvious that Bitmain plays around with different timing specs for the internal circuits - none of them are the same. Since BM no longer releases the data sheets Sidehack had to manually debug the signals/commands and timing for the 1397 and then supplied that info to Kano to work into the driver.