Microsequencer in a data processing system using stack storage for controlling the sequencing of microroutines
US4679138A · kind A · utility
5Cited by
4References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 23, 1981 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Apr 23, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/226
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing system in which macroinstructions are decoded to provide a sequence of microinstructions comprising one or more microroutines. A stack storage means stores data for use in such microroutines. The final microinstruction of the microroutines is a request to retrieve or remove data from the stack. When no data is present therein (the stack is empty) a new macroinstruction is requested and when data is present in the stack the microroutine returns to another mircoroutine in which it is acting as a micro-subsroutine to permit continuation of the other microroutine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.