07010671 cites 21 patents.

A computer system is disclosed herein including a given microprocessor specifically designed to operate in a virtual operating mode that allows a software program previously written for an earlier designed single program microprocessor to execute in a protected, paged, multi-tasking environment under a particularly designed host operating software program. The system also includes means for executing software interrupt (INTn) instructions, using emulation software forming part of the host program in order to emulate the way in which these instructions would have been executed by the earlier microprocessor. As a unique improvement to this overall computer system, certain ones of the INTn instructions are executed by means of emulation software while others are executed by means of the previously written program in cooperation with the given microprocessor and its host operating software program.

Title
Computer system and method for executing interrupt instructions in two operating modes
Application Number
10/94498
Publication Number
7010671 (B2)
Application Date
March 7, 2002
Publication Date
March 7, 2006
Inventor
Donald Alpert
Santa Clara
CA, US
John H Crawford
Santa Clara
CA, US
Agent
Blakely Sokoloff Taylor & Zafman
Assignee
Intel Corporation
CA, US
IPC
G06F 13/24
G06F 9/48
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