Method of resetting sequence of access to extended memory disrupted by interrupt processing in 80286 compatible system using code segment register
US5125087A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1988 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Nov 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/3861
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for allowing an interrupted computer program to detect the occurrence of an interrupt. In a preferred embodiment, a system according to the present invention allows an Intel 80286-compatible based computer program executing in real mode to detect the occurrence of an interrupt during the execution of a set of instructions. According to a preferred method of the present invention, the LOADALL instruction is used to load the code segment selector with the segment address of the code in the interrupted routine to be executed upon return from an interrupt and to load the code segment base address with the segment base address of the set of instruction during whose execution interrupt is to be detected. A preferred method then executes the set of instructions. Upon occurrence of an interrrupt, the preferred method saves the value in the code segment selector and executes an interrupt routine. Upon return from the interrupt routine, a preferred method loads the code segment base address based on the saved code segment value so that the interrupted routine resumes execution at an instruction other than the interrupted instruction. The methods of the present invention a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.