Desk top electronic computer with a removably mounted ROM
US4091446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1976 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Jan 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic computer is provided with a numerical keyboard, a microprogrammed CPU, as well as RAMs and ROMs, some of them of pluggable type. A pluggable ROM stores a plurality of programs and comprises a portion formed of an associated plurality of registers each one storing a jump instruction and the associated programs. The numerical addresses of said registers are represented by a series of numerals which can be entered by the keyboard. Programs can be entered from the numerical keyboard into a RAM memory, in form of a sequence of numerical codes, each code corresponding to a subroutine prerecorded in a ROM. Each program so "learned" by the computer can be repeatedly executed by depressing a fixed code on the keyboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.