Method of transferring control in a multitasking computer system

Details Method of transferring control in a multitasking computer system Method of transferring control in a multitasking computer system

1988-09-13

1990-11-27

Zache, Raulfe B.

Boots, shoes, and leggings

364280, 3642813, 3642817, G06F 946

Patent

active

049741594

ABSTRACT:
An improved method and system for transferring control in a multitasking computer system is provided. In preferred embodiments for use with 80386 machines, the virtual machine monitor (VMM) writes a virtual machine break point (VMBP) instruction into the executable code of selected DOS routines to cause the DOS routines to transfer control to the VMM. By selecting systems calls of indefinite duration for the application of this method, system performance can be improved. In this preferred embodiment for 80386 machines, 8086 programs designed to run under DOS can be more efficiently executed in a multitasking environment.

REFERENCES:
patent: 4486831 (1984-12-01), Wheatley et al.

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