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Control apparatus for controlling data flow between a control processing unit and peripheral devices
| Details |
Inventors: Dalmasso, Ginette;
Assignee: Compagnie Internationale pour l'Informatique Cii-Honeywell Bull (Societe (Paris, FR)
Primary Examiner: Chapnick; Melvin B.
Assistant Examiner:
Attorney, Agent or Firm: Cameron, Kerkam, Sutton, Stowell & Stowell
A peripheral controller capable of simultaneously handling data transfer microprocesses for several different peripheral devices. The controller includes a set of memories, logic circuits and a physical interface channel for transmitting data between a control processing unit and the peripheral controller and for transmitting data between the peripheral controller and the peripheral devices, an interface control unit for enabling a predetermined one of the peripheral devices to communicate with the peripheral controller, a memory for storing microprograms for controlling the data flow between the control processing unit and the peripheral devices, and a processing circuit for administering the sharing of the processing time of the peripheral controller between the plurality of peripheral devices and the control processing unit. |
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DETAILED DESCRIPTION What I claim is: 1.
In a data processing system, a peripheral control apparatus for controlling the flow of data between a control processing unit and a plurality of peripheral devices, said peripheral control apparatus comprising: 1.
interface channel means coupled to said control processing unit and to the plurality of peripheral devices for transmitting data between said peripheral control apparatus, said control processing unit and said plurality of peripheral devices; 2.
interface control means coupled to said interface channel means for enabling a predetermined one of said plurality of peripheral devices or said control processing unit to communicate with said peripheral control apparatus; 3.
memory means coupled to said interface control means for storing microprograms for controlling the data flow between said control processing unit and said one peripheral device, and for storing data derived from the said interface control means; and 4.
processing means connected to said memory means and said interface control means for administering the sharing of processing time of said peripheral control apparatus between said plurality of peripheral devices and said control processing unit, and for processing data derived from said interface control means.
2.
Peripheral control apparatus according to claim 1, wherein said interface control unit means comprises: 1.
multiplexing unit means for exchanging data and orders between said processing means and each of said peripheral devices; 2.
first interface means operatively connected to said control processing unit and said plurality of peripheral devices, including: a.
first means for connecting each of said peripheral devices and said control processing unit; b.
second means for indicating the type of operation which is to take place at a selected peripheral device; and c.
third means for indicating that an event has occured at said selected peripheral device; 3.
second interface means operatively connected to said processing means and to said control processing unit, including: a
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I/O Systems 
