Room Graphics Parameter read by MeasureCharacterDistance, ReadCharacter, InitialiseDisplayBuffer, ReadRoomGraphicsParameter, CheckFlagAndSetDisplayParameter, TestEndMarker, ProcessScriptDisplay, ProcessDisplayAction, AcceptGraphicsParameter, RecordResultRoomGraphics_CountCountRemaining, ProcessDisplayRecordFromScript, AcceptSetGraphicsParameter, RecordResultRoomGraphics_CountGraphicsSteps, TestLowBitsOfGraphics, SetObjectPointers, ProcessDisplayRecord, CE18, HandleRoomDisplay, ClearRoomDisplayParameters, RunSimpleAction, StoreCharacterAttribute, CombineCharacterRoom, DispatchRoomGraphics, RecordResultRoomDisplay, ReadCharacterTextPointers, StoreResultHighByte, CopyClockLink and ProcessCharacterAttribute.