Title: Peripheral device reassignment control technique

Abstract: A plurality of peripheral devices having physical addresses are accessed by a host processor by use of logical addresses which are utilized by the various programs in a multiprocessing environment. Input/output tables are arranged to include pointers for relating the logical address provided by a programmer to the physical address of the device thereby providing necessary device specific information to the peripheral controller coupled with the peripheral devices. The input/output tables are structured so that pointers relating the physical and logical addresses may be changed to reassign the logically addressed device to another device and accordingly to point to another physical address.

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Other info:

Inventors: Barbour, Kenneth R. (Burlington, MA, US)
Evans, Henry J. (Harvard, MA, US)

Application Number: 463018
Filing Date: 1974-04-22
Publication_date: 1976-04-06
Assignee: Honeywell Information Systems, Inc. (Waltham, MA)
Primary Class(es): 710/3 703/24
Other Classes:
US Patent Ref:

3340512	Sep, 1967	Hauck et al.	340/172.
3581286	May, 1971	Beausoleil	340/172.
3593302	Jul, 1971	Saito et al.	340/172.
3639909	Feb, 1972	Hauck et al.	340/172.
3792448	Feb, 1974	Bennett et al.	340/172.

Other Refs:
Primary Examiner: Zache, Raulfe B.
Assistant Examiner:
Attorney: Solakian; John S., Reiling; Ronald T.