Call instruction for ring crossing architecture

Details Call instruction for ring crossing architecture Call instruction for ring crossing architecture

1985-06-27

1987-10-27

Williams, Jr., Archie E.

Boots, shoes, and leggings

G06F 906

Patent

active

047034173

ABSTRACT:
In combination with a multiprocessing/multiprogramming computer system having a ring protection mechanism for protecting computer programs from unauthorized access, a new call instruction architecture is implemented partly in firmware and partly in hardware. Also, a new stack mechanism stores hardware managed control information in a control frame and software controlled data in a data frame.

REFERENCES:
patent: 4297743 (1981-10-01), Appell et al.
patent: 4525780 (1985-06-01), Bratt et al.

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