|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. Usually set to 4=[[Awa]], 5=[[Schneider]], or 7=[[Amstrad]], see [[LK-selectable Brand Names]] for details.||Purpose unknown (set to "1")
|-
|2||LK2||Purpose unknown (set to "0")
|0||[[CRTC]] VSYNC||Vertical Sync ("1"=VSYNC active, "0"=VSYNC inactive)||Same as on CPC
|-
|}
{| class="wikitable"
|+ Distributor ID
!Bit 3
!Bit 2
!Bit 1
!Brand name
|-
|0
|0
|0
|Isp
|-
|0
|0
|1
|Triumph
|-
|0
|1
|0
|Saisho
|-
|0
|1
|1
|Solavox
|-
|1
|0
|0
|Awa
|-
|1
|0
|1
|Schneider
|-
|1
|1
|0
|Orion
|-
|1
|1
|1
|Amstrad
|}