Data processor controlled by microprograms
US4394735A · kind A · utility
10Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Mar 25, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/261
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processor which is controlled by microprograms and which can execute machine instructions having suboperation codes in addition to operation codes. In the data processor, access to a control memory is performed by using a next address data obtained by a logical operation between contents of a next address field of a micro instruction read out of the control memory by using the operation code of the above-mentioned machine instruction and a selected one of suboperation index data of a micro instruction read out from the control memory by using the suboperation code of the machine instruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.