Abstract: A communication bit pattern detection circuit that provides an output signal upon the occurrence of one of several predefined bit patterns for a series of a specified number of bits for a multiple of input signals where each input signal is a continuous stream of serial bit data. The communication bit pattern detection circuit includes a detection stage having combinational logic connected to receive the input signals and providing the logically combined bits to latches of a shift register. The number of latches in the shift register is less than the specified number of bits for the predefined bit patterns. The output of these latches are provided to a logic stage that includes additional combinational logic that provides a nondetection signal. This nondetection signal is provided to indicate that the bits received are not part of any of the predefined bit patterns. The nondetection signal is input to reset a counter.

Abstract: The present invention describes an integrated text and data processing system allowing processing of link data before output. The system also provides simultaneous dual emulation of a display and printer normally associated with a host data processor. In accordance with the first aspect of the invention, an input/output terminal includes a support logic circuit for interconnecting the input/output terminal to a port of an intermediate control unit attached to a central processing unit. The input/output terminal includes separate link and display buffers whereas link data may be stored in the link buffer for processing before output to the display associated with a text processor. In accordance with another aspect of the invention, the input/output terminal may include a plurality of support logic circuits each connected to one of the ports of one or more control units associated with one or more central processing units.

Abstract: The present disclosure relates to word processing systems wherein material to be printed is formatted on a display unit having a display, e.g., CRT display and a text formatting processor which formats the display material. The display unit further includes means for controlling a printer to print the formatted text. In the present invention a plurality of such display units share a printer. This is accomplished by having at least one of the display units comprise means for controlling the sharing of the printer by the plurality of display units and each of the other display units communicate with the printer through these printer sharing control means. At least part of this printer sharing control means is contained in the text formatting processor of the primary display unit through which the other display units communicate with the printer.