Abstract: A digital control device is used with a character generator for producing text in a typescript having multiform characters, such as Arabic script. The character generator includes a character store with a base page section to store codes identifying the base body of the characters and at least one additional page section to store codes identifying special character forms. The control device is arranged to register and process the incoming character identification codes to produce a control signal having a first state to enable a final address code to be produced to address the base page section in the character store and having a second state to enable a final address code to be produced to address the additional page section in the character store.

Abstract: An apparatus is described which permits a dual display on two pages one next to the other on a cathode ray tube. During the scanning of each line of n characters, the address of the character position k, where k is lower than n, is detected and in response to this detection, a signal is generated for stopping the counting of the character positions during a predetermined time. Thereafter, the address of the character position (k+1) is detected and in response to this second detection, an inhibit signal is produced for the duration of the stop signal for inhibiting the illumination of the spot on the CRT screen. Also the addresses of character positions o-k are converted into addresses of character positions n through (k+1) respectively in response to a select signal indicating the selection of one of the pages on the CRT screen.