I've just realised I'd wrote your name Richard, instead of Rogers, as it was his initialisation listing I was querying, no worry.

I see one of Roger's later posts shows the two subsequent bytes, as with the subsequent Page Address command ($22) two bytes.





The Internal IREF Setting' command ($AD), appears to be listed on older pdf's for the 72x40 type(?), a command not required on later board as set by a resistor.