Abstract: An auxiliary device for editing document comprises a computer peripheral and a modular key set with document editing function. The modular key set is arranged on the computer peripheral and connected to an I/O bus of the single-chip microprocessor. Therefore, user can directly use the modular key set to edit document without invoking a composite key or mouse.

Abstract: A multimedia keyboard structure which includes a standard keyboard having a control key pad having a set of keys for cursor, number, screen scroll and multimedia function controls. The control key pad is connected to the scan matrix formed by the I/O lines of the microprocessor of the internal circuit structure of the keyboard. The scan code of Num Lock or Scroll Lock is adapted to match Win 95's register in testing the flag bit of Num Lock or Scroll Lock and judging its flag bit through a driver so that the job of code converting can be executed. The operator is allowed to directly control the control key pad and to monitor the operation through a display screen to which the standard keyboard is connected by means of employing the function provided by WindExec O of Windows API to the path of the file and the file index of the application program.

Abstract: The subject invention relates to a type of keyboard with expandable function keys, on the keyboard are a number of expanded function keys, said function keys are connected to the additional I/O cable for the microprocessor in the circuit structure in the keyboard, to coordinate with the original keyboard scanning matrix, forming a new scanning matrix, hence the default codes of said function keys may coordinate with the execution of the application programs in the window system, so the operator may directly control the existing functions of a peripheral device (multimedia) on the keyboard, with the control panel operation displayed on the monitor screen, with one IRQ connector pin of said microprocessor being connected jointly to the negative poles of three LED diodes, while the positive poles of each LED diode is connected to one line of the scanning matrix, so said keyboard may be compatible with an XT microprocessor in its application; so said function keys may be defined in the original scanning matrix th

Abstract: The present invention relates to an electromagnet induced switch comprises a substrate having an upper and lower conductive membranes, a plurality of electromagnet induced switches and a circuit controlling device. The electromagnet induced switches are suitably mounted onto the substrate and are suitably controlled by the circuit controlling device (including an analog multiplexer, a signal amplifying device, a signal triggering device, a signal locking-up/deleting device, a CPU and a breaking point controlling device during operation.) By this arrangement, the depressing position can be suitably recognized and the resulted signal is suitably and properly processed by the CPU. Consequently, a quick, missing free, free of incorrect works, linear and silent inputting device is resulted.