Patent · US Expired

Data processing system

US4589086A · kind A · utility

4Cited by

4References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Wolfgang Beifuss · Chieming, DE
Bernd Haussmann · Königstein, DE
Michael Pomper · Schliersee, DE
Ewald Soutschek · Haar, DE

Key dates

Filing date	Aug 30, 1982
Grant date	May 13, 1986
Priority date	—
Expiry date	Aug 30, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG06F7/523
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A data processing system having an arithmetic unit is designed for a multiplication of n-place numbers in 2's complement according to the Booth algorithm, and for division of unsigned numerals. A 2n-stage shift register is connected over a logical control circuit to the operation code inputs of an ALU. The control circuit automatically forms instruction code signals to the ALU as a function of informational bits derived from the shift register, whereas other operation code input signals are directly connected to the operation code inputs. The control circuit is a sequential circuit having a multiplexer for the selective through-connection of the multiplication code signals, the division code signals, or other operation code signals to the operation code inputs of the ALU.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.