Control store system with flexible control word selection
US3958227A · kind A · utility
15Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Sep 24, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/267
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A branch-address translation register (BAXR) is loaded by a current or a prior control word field. A word selection decoder circuit receives the BAXR outputs and combines them with machine-status signals to generate a word selection signal for selecting a control word from a currently accessed branch group in the control store. A BAXR switching circuit is also provided so that any control word can switch off the BAXR output and cause a control word selection without translation. The invention can obtain any required degree of addressing flexibility in microcode branch selection, i.e. from partial to total flexibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.