Communications: electrical – Digital comparator systems
Patent
1974-03-27
1976-07-13
Ruggiero, Joseph F.
Communications: electrical
Digital comparator systems
179 18ES, G05B 1500, H04M 300
Patent
active
039697010
ABSTRACT:
In a SPC (Stored Program Controlled) system including function blocks of the controlled system proper and function blocks of the controlling computer, an improved function block orientation is introduced by providing each function block with its own program and data stores and with its own addressing device. Via an address decoder, access to control information of the respective function block, registered in its stores is possible only by means of its addressing device identified by a responsive function block number. The central processor unit of the computer communicates with the addressing devices of the function blocks by means of a selection device which is set by the respective function block identifiers or numbers. In each addressing device are stored addressing parameters which define the storage structure of the control information in the associated stores. For performance of a control operation, operation parameters are supplied to the central processor unit. The actual function block number is one of the operation parameters which, however, are not bound to the storage structure. An address calculation unit associated with the central processor unit calculates on the basis of the operation and addressing parameters an address number allotted to the responsive control information. The address number is transferred via the selection device to the address decoder of the called function block.
REFERENCES:
patent: 3560936 (1971-02-01), Busch
patent: 3568157 (1971-03-01), Downing
patent: 3569939 (1971-03-01), Doblmaier et al.
patent: 3757307 (1973-09-01), Cosserat et al.
patent: 3818455 (1974-06-01), Brenski et al.
Ruggiero Joseph F.
Telefonaktiebolaget L M Ericsson
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