Command controlled multi-storage space protection key pretesting

Boots – shoes – and leggings

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

3642466, 3642557, 3642551, 364247, 364259, 3642592, 364265, 3642472, 364969, 364971, 364963, 3649633, 364955, 3649555, G06F 1214, G06F 1210

Patent

active

049997700

ABSTRACT:
A multi-address space control for use in a information processing system includes accessing a plurality of address spaces produced by different address translation table based on a selection command for a plurality of first address registers, and comparing a program status word key with a main storage key in a main storage to protect the main storage. The multi-address space control between different address spaces includes a PSW key register for holding the program status word key, a work access key register capable of arbitrarily designating an access key in accordance with a data transfer instruction, access apparatus for allowing an access to the main storage irrespective of the value of a main storage key when the value of the key selected by a selector as an access key from the work access key register and the PSW key register is a predetermined value, and setting apparatus for accessing the different address spaces by changing-over the plurality of leading address registers and the work access key register and PSW register, detecting an access exception, and setting the predetermined value in the work access key register to judge the work access key as an access key if an access exception is not detected.

REFERENCES:
patent: 3264615 (1966-08-01), Case et al.
patent: 3328765 (1967-06-01), Amdahl et al.
patent: 3328768 (1967-06-01), Amdahl et al.
patent: 3573855 (1971-04-01), Cragon
patent: 3576544 (1971-04-01), Cordero
patent: 3742458 (1973-06-01), Inoue
patent: 3825903 (1974-07-01), Brown
patent: 3947823 (1976-03-01), Padegs
patent: 4037214 (1977-07-01), Birney et al.
patent: 4038645 (1977-07-01), Birney et al.
patent: 4099243 (1978-07-01), Palumbo
patent: 4136385 (1979-01-01), Gannon
patent: 4355355 (1982-10-01), Butwell
patent: 4366537 (1982-12-01), Heller et al.
patent: 4430705 (1984-02-01), Cannavino et al.
patent: 4439830 (1984-03-01), Chueh
patent: 4472790 (1984-09-01), Burk et al.
patent: 4500952 (1985-02-01), Heller
patent: 4521846 (1985-06-01), Scalzi et al.
patent: 4589064 (1986-05-01), Chiba et al.
patent: 4669043 (1987-05-01), Kaplinsky
patent: 4733344 (1988-03-01), Watanabe et al.
patent: 4961139 (1990-10-01), Hong
The HITAC5020 Time Sharing System, Proc. 24th ACM National Conference, 1969, pp. 419-429.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Command controlled multi-storage space protection key pretesting does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Command controlled multi-storage space protection key pretesting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Command controlled multi-storage space protection key pretesting will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-452480

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.