Operator controlled programmable keyboard apparatus

Details Operator controlled programmable keyboard apparatus Operator controlled programmable keyboard apparatus

G - Physics

06

F

354/230.8

G06F 15/02 (2006.01) G06F 3/023 (2006.01) G06F 3/14 (2006.01) H03M 11/20 (2006.01)

Patent

CA 1098213

OPERATOR CONTROLLED PROGRAMMABLE KEYBOARD APPARATUS ABSTRACT A cathode ray tube (CRT) and keyboard display terminal are shown wherein the keyboard/display terminal is operated in accordance with the program routines of a microcontroller which is dedicated to the control of the display keyboard. The terminal is adapted for connection with the I/O channel of a host data processing system. The microcontroller includes a read only store (ROS) which includes instruction routines primarily dedicated to the transfer of data between the host processor and the microcontroller. The micro- controller further includes a random access store which is loadable by the customer during initial program load (IPL) operation to store customer selected program routines for controlling the CRT display and keyboard and for initializ- ing tables in the store which define the customer selected character and symbol set. The tables in store are utilized to provide data for determining the functions which are to be performed incident to the depression of each key on the keyboard and since these are customer loadable, the functions of the keyboard can be changed by reinitializing the system. The tables are also utilized to provide data which directs the execution of the various graphic, local function and interrupt functions. These tables also provide the mechan- ism whereby an operator making use of the keyboard can manually change the functions of each and every key on the keyboard except one key which is dedicated to the func- tion of redefining the functions of other keys. BC9-77-001 -1-

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