Boots – shoes – and leggings
Patent
1992-09-09
1995-07-11
Black, Thomas G.
Boots, shoes, and leggings
364DIG1, G06F 1540
Patent
active
054329299
ABSTRACT:
A data storage and retrieval system is described having one or more key-lock storage areas which can be modified under the control of commands received from an attached computer. Each key-lock is stored in nonvolatile data storage. A key-lock contains a key field and a lock field. The contents of the key-lock are read and modified based on commands received from the computer. The command to write a new key-lock value specifies a first key and a proffered key-lock. The subsystem reads the current key-lock from nonvolatile storage, then compares the first and current keys. When the first and current keys are equal, the proffered key-lock is stored in the key-lock storage area of nonvolatile data storage, thereby replacing the original key-lock. When the keys are not equal, the key-lock is left unmodified and status data is transmitted to the computer indicating that the update request has failed. The subsystem will send the original key-lock value to the computer upon demand. One alternative embodiment of the invention has means for designating a predetermined unlocked key value as indicative of the key-lock being unlocked.
REFERENCES:
patent: 4128874 (1978-12-01), Pertl et al.
patent: 4380798 (1983-04-01), Shannon et al.
patent: 4471163 (1984-09-01), Donald et al.
patent: 4574350 (1986-03-01), Starr
patent: 4725946 (1988-02-01), Prange et al.
patent: 5261063 (1993-09-01), Kohn et al.
patent: 5265245 (1993-11-01), Nordstrom et al.
patent: 5274809 (1993-12-01), Iwasnki et al.
patent: 5327556 (1994-07-01), Mohan et al.
Wagner, "Shared Resource Locking Controls", IBM Technical Disclosure Bulletin, vol. 25, No. 7B, Dec. 1982.
Escola Dennis R.
Gerdt Steven D.
Harding Barrie N.
Hunter Paul W.
Shipman, Jr. Lloyd R.
Black Thomas G.
International Business Machines - Corporation
Wang Peter Y.
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