.-STOPNOP--.   
>>-+----------+------------------------------------------------><
   '-NOSTOPNp-'   

STOPNOP tells IDF to stop on NOP and NOPR instructions that follow BAL, BALR, BAS, and BASR instructions.

NOSTOPNP prevents IDF from stopping on NOP and NOPR instructions that follow BAL, BALR, BAS, and BASR instructions.