Information processing system
First Claim
1. An information processing system including a main memory unit, arithmetic control unit and a plurality of input/output units;
- a first bidirectional bus through which said main memory unit, said arithmetic control unit and at least a first of said plurality of input/output units are commonly connected;
a bus controller adapted to manage a first bus access requirement relative to said main memory unit, said arithmetic control unit and said first input/output unit;
one unit of said main memory unit, said arithmetic control unit and said first input/output unit functioning as a master unit and another of said units functioning as a slave unit under the control of the bus controller whereby data is transferred between said master and slave units;
said bus controller including means for processing a bus request from said arithmetic control unit and for granting said request, whereupon said arithmetic control unit and a slave unit are directly coupled via said first bus for the transfer of address and data information therebetween;
a second bidirectional bus through which said arithmetic control unit and a second input/output unit are commonly connected; and
bus control means provided in said arithmetic control unit to control data transfers between said units connected to said second bidirectional bus.
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Accused Products
Abstract
An information processing system having a main memory unit, an arithmetic control unit, and a plurality of input/output units, is comprised of a first bus, which is bidirectional, commonly connecting the main memory unit, the arithmetic control unit, and at least one input/output unit, a bus controller for controlling data transfer between two units connecting to the first bus, a second bus, which is also bidirectional, commonly connecting to the arithmetic control unit with at least another input/output unit, and a bus control means which is provided in the arithmetic control unit and controls data transfer between two units connecting to the second bus. The information processing system uses various units connecting to the first and second buses in time sharing and multiplexing mode.
36 Citations
10 Claims
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1. An information processing system including a main memory unit, arithmetic control unit and a plurality of input/output units;
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a first bidirectional bus through which said main memory unit, said arithmetic control unit and at least a first of said plurality of input/output units are commonly connected; a bus controller adapted to manage a first bus access requirement relative to said main memory unit, said arithmetic control unit and said first input/output unit;
one unit of said main memory unit, said arithmetic control unit and said first input/output unit functioning as a master unit and another of said units functioning as a slave unit under the control of the bus controller whereby data is transferred between said master and slave units;
said bus controller including means for processing a bus request from said arithmetic control unit and for granting said request, whereupon said arithmetic control unit and a slave unit are directly coupled via said first bus for the transfer of address and data information therebetween;a second bidirectional bus through which said arithmetic control unit and a second input/output unit are commonly connected; and bus control means provided in said arithmetic control unit to control data transfers between said units connected to said second bidirectional bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A multi-processing system comprising a plurality of information processing systems, each information processing system comprising:
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a first bidirectional bus through which said main memory unit, said arithmetic control unit and at least a first of said plurality of input/output units are commonly connected; a bus controller adapted to manage a first bus access requirement relative to said main memory unit, said arithmetic control unit and said first input/output unit;
one unit of said main memory unit, said arithmetic control unit and said first input/output unit functioning as a master unit and another of said units functioning as a slave unit under the control of the bus controller whereby data is transferred between said master and slave units;
said bus controller including means for processing a bus request from said arithmetic control unit and for granting said request, whereupon said arithmetic control unit and a slave unit are directly coupled via said first bus for the transfer of address and data information therebetween;a second bidirectional bus through which said arithmetic control unit and a second input/output unit are commonly connected; bus control means provided in said arithmetic control unit to control data transfers between said units connected to said second bidirectional bus; and in which the first busses of the plurality of information processing systems are linked through a computer system linkage device. - View Dependent Claims (10)
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Specification