Data processor having two types of carry flags
US4245327A · kind A · utility
8Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Mar 5, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/325
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Two flip-flops for carry information are provided in a data processor; one for carry of arithmetic operation and the other for carry occuring when a program counter is incremented. A state of the latter flip-flop provides a condition of a conditional branch instruction. With the provision of those flip-flops, a multidigit operation can be performed without increasing programsteps to save carry information attendant on the operation data. A simple program may be prepared without increasing hardware for skip instruction processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.