Data and text processing system having terminals with dual emulation capability.

摘要

The system comprises at least one central processing (10, 12), a plurality of input/output terminals (14) and at least one control unit (16) having a plurality of ports (40, 42) each being connected to an input output terminal (14) for interfacing it with at least one central processing unit (10, 12). Each input/output terminal comprises a plurality of support logic means connected to one of the ports (40, 42) of the control unit (16), a buffer to each support logic means for storing data received from or to be transmitted to a central processing unit (10, 12), a text processor (38), a keyboard connected to the text processor (38) for effecting processing of link data and a printer and display (36, 48, 56) for outputting data and text character information. This structure allows the text processor (38) in the input/output terminal (14) to simultaneously, yet independently, emulate a display and printer normally associated with a host central processing unit.