Controlling ill-behaved computer add-on device through a virtual

Details Controlling ill-behaved computer add-on device through a virtual Controlling ill-behaved computer add-on device through a virtual

1996-12-10

1999-03-09

Auve, Glenn A.

395591, 39518401, 395284, G06F 1100

Patent

active

058812822

ABSTRACT:
A computer system is programmed with basic input/output services (BIOS), including an initialization service, and an associated virtual mode execution monitor. The initialization service scans for option ROMs of add-on devices at power on/reset. For each detected option ROM, the initialization service creates the runtime definition of its initialization task, setting up the initialization task to be executed in a virtual mode, redirecting all interrupts and exceptions arisen during execution of the initialization task to the virtual mode execution monitor. For each redirected interrupt/exception, the virtual mode execution monitor either allows the triggering attempted operation to be performed, or substitutes an impermissible triggering attempted operation with one or more fail safe recovery operations, or simply terminates the "ill-behaving" initialization task.

REFERENCES:
patent: 5675748 (1997-10-01), Ross
patent: 5689726 (1997-11-01), Lin
patent: 5692189 (1997-11-01), Lipe

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