Hexadecimal digit shifter output control by a programmable read only memory
US4295202A · kind A · utility
6Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1979 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Nov 9, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/3844
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Scientific Instruction Processor (SIP) uses a Programmable Read Only Memory (PROM) to control the output of a two stage shifter. The shifter performs the necessary mantissa shift operations of shift right, shift left, shift right around, as well as inserting certain constant information into the system. Control signals and shift signals applied to the input address terminals of the PROM select the PROM output signals which enable the selected mantissa hexadecimal digits which output the shifter. This forces hexadecimal digits from the enabled positions and hexadecimal ZERO digits in those positions not enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.