16	$0010	POKMSK

||BIT||DECIMAL||FUNCTION
|7|128| The BREAK key is enabled. 
|6|64| The "other key" interrupt is enabled.
|5|32| The serial input data ready interrupt is enabled. 
|4|16| The serial output data required interrupt is enabled.
|3|8| The serial out transmission finished interrupt is enabled.
|2|4| The POKEY timer four interrupt is enabled (only in the "B" or later versions of the OS ROMs).
|1|2| The POKEY timer two interrupt is enabled.
|0|1| The POKEY timer one interrupt is enabled.