Virtual computer system

Details Virtual computer system Virtual computer system

1988-07-06

1991-05-21

Chan, Eddie P.

Boots, shoes, and leggings

3642321, 3642563, 3642551, G06F 1200, G06F 1208

Patent

active

050180649

ABSTRACT:
In the conventional virtual computer system, in order to provide the same access method for the host and the guest, there exists a great overhead for the operations to save and to restore the host resource at a change-over between the host and the guest. In the of the invention system, the same access method is provided for the host and the guest and at the same time the overhead is removed. The host resource and the guest resource are separately allocated. There is disposed a mode line indicating whether the present state is associated with the host or the guest. There is also disposed an access controller which operates such that when the mode line indicates the host, the host resource is accessed, and when the guest is indicated, the guest resource is accessed.

REFERENCES:
patent: 4456954 (1984-06-01), Bullions, III et al.
patent: 4674038 (1987-06-01), Brelsford et al.
patent: 4779188 (1988-10-01), Gum et al.
patent: 4816991 (1989-03-01), Watanabe et al.
patent: 4843541 (1989-06-01), Bean et al.

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