This line is ok MOVE?CB 1 ,_Flag what means the question mark.
NOTHING , MOVE?CB IS THE NAME OF A PBP MACRO that moves a constant to a byte var
advantage is that the macro does all the banksel for you

more proper would be FOR YOUR isr vars

Code:
Flag var bit  bank0
enc_new VAR BYTE  bank0
enc_old VAR BYTE  bank0
enc_counter VAR WORD  bank0