| 摘要 |
<p>Computer apparatus comprising a central computer (13) having a data input port (12), means (5, 6, 7, 8, 9) connecting two or more remote chord keyboards (1, 2, 3, 4) to the input port, means (10) for identifying with each respective keyboard aplpha-numeric and like character data and command instructions generated by operation thereof and received through the input port; the central computer being programmed to process and combine the character data from the keyboards in accordance with the commands and to output resultant information for display in common by video and/or audio display means (14); in a preferred embodiment the key switches (U, S, O, E, SPACE and CONTROL) are connected in an R-2R resistive ladder network so that operation thereof either singly or in combinations of two to all will produce ratiometric changes in an analog output voltage (VI/P) that uniquely varies as the binary weighting of the operated switch or switches-combination, an analog-to-digital-converter (10) being connected to the input port of the computer. </p> |
