Data processing apparatus and method with encoded system bus

Details Data processing apparatus and method with encoded system bus Data processing apparatus and method with encoded system bus

G - Physics

06

F

354/230

G06F 15/16 (2006.01) G06F 13/42 (2006.01)

Patent

CA 1123107

ABSTRACT OF THE DISCLOSURE A data processing apparatus including a processor unit and one or more storage units, and input/output control- ler units by a common system bus. The system bus includes a system operation code field and an associated system informa- tion field. A system operation code is encoded to designate the function and nature of the information in the associated system bus information filed. Synchronous clocking is typi- cally employed on the system bus to insure time synchroniza- tion throughout the data processing apparatus. The system operation code represents many different types of information. For example, when the system bus is connected for transfers between the storage unit and other parts of the system, the system operation code is encoded to specify that the associ- ated system information field contains either a storage unit address or storage unit data. Access control apparatus is provided for allocating access to the system bus among the various units connected to the system bus. A-33069/DEL -1-

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