Digital computer structure providing arithmetic and boolean logic operations, the latter controlling the former
US4212076A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1976 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Sep 24, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/30094
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital computer of relatively simple and efficient structural organization which is capable not only of conventional arithmetic operations according to a program but also of (i) performing chained Boolean logic processing on any selected bit of any of various selected words held in memory, (ii) using the logic processing result by storing it at any selected bit location in any of various selected words held in memory, and/or (iii) causing different, predetermined instructions within a program to have their execution dependent upon the results of previously performed single bit logic processing. The logic processing is carried out in response to specially coded instruction words which may be randomly interspersed between conventional arithmetic instruction steps within an overall program. Existing registers and apparatus components necessary for conventional arithmetic operations are utilized in large measure to carry out the routing of signals to and from the logic processor, and very little added hardware is required to create the logic processing, storing, and dependent conditioning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.