Multi-mode file storage calculator
US4080659A · kind A · utility
Inventor
Key dates
| Filing date | Feb 28, 1977 |
| Grant date | Mar 21, 1978 |
| Priority date | — |
| Expiry date | Feb 28, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0232
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multi-mode calculator apparatus is provided including microprocessor means controlled by a control program contained in read only memory means, random access memory means, a keyboard unit, mode selection means and a display unit. In one mode, the calculator apparatus provides for selectively storing data and for updating data already stored in a plurality of permanent storage registers organized in one or more file blocks. In a second mode, step by step processing of the stored data under microprocessor control is enabled including step by step line indication means for guiding the calculator user through the filling out of complex forms. A third mode enables erasure of a file as a block and for transfer of the contents of one file to another again as a block. A standard calculation mode for simple arithmetic calculations may also be provided. The apparatus includes a replaceable programming assembly, enabling different operations to be performed by the control program as a function of the given programming assembly presently installed in the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.