Apparatus and method enabling a computer to transfer control between two program segments that call one another but operate in different modes
US5604885A · kind A · utility
7Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1991 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Feb 1, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/4486
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A software product and method for operating a computer, so that a first program operating in a first operating mode having a first addressing format may call code located in a second program operating in a second operating mode having a second addressing format. An argument converter converts all arguments in a stack used in inter-process communication from the first addressing format to the second addressing format. A call gate converts the desired return address into the second addressing format. Thus the called second program properly recognizes the received data and upon completion generates the correct return address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.