|4||LK4||Screen Refresh Rate ("1"=50Hz, "0"=60Hz)||Set to "1"=50Hz (but ignored by the KC BIOS, which always uses 50Hz even if LK4 is changed)
|-
|3||LK3|| rowspan="3" |3bit Distributor ID, see [[LK-selectable Brand Names]] for details. Usually set to 4=[[AmstradAwa]], 5=[[AwaSchneider]], or 7=[[SchneiderAmstrad]], see [[LK-selectable Brand Names]] for details.||Purpose unknown (set to "1")
|-
|2||LK2||Purpose unknown (set to "0")