It seems that EIP 615 specifies 0xb0 JUMPTO 0xb1 JUMPIF 0xb2 JUMPV 0xb3 JUMPSUB 0xb4 JUMPSUBV 0xb5 BEGINSUB 0xb6 BEGINDATA 0xb7 RETURNSUB 0xb8 PUTLOCAL 0xb9 GETLOCAL Which doesn't quite gel with your list aroudn 0xb2.