|-
|3||LK3|| rowspan="3" |Distributor ID. Usually set to 4=[[Awa]], 5=[[Schneider]], or 7=[[Amstrad]]
see See [[LK-selectable Brand Names]] for details
||Purpose unknown (set to "1")
|-
|-
|3||rowspan=4|Keyboard line||rowspan=4|Select keyboard line to be scanned (0-15)
See [[Programming:Keyboard scanning]] for details
|-
|2