For generating and finishing documents, a first data file in a first format, which describes the content of a document, is provided. Depending on fluid pressure in the first and fluid pressure in the second spatial areas, the pressing element is movable with respect to the housing for producing and canceling a frictional engagement between the and the second friction surface formations. In one embodiment the replacement pieces are placed on the square they originated on at the beginning of the game or the next available open square in the file. Enabling techniques include sequential sensing of memory columns, a two-pass write operation, a two-step refresh operation, a reference scheme that uses reference data stored in regular memory cells, and the application of digital signal processing to determine sensed data and cancel crosstalk noise.