Design of a bus arbitration sequential circuit for computer

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Consider the design of a bus arbitration sequential circuit for a computer containing four CPUs. This circuit has four Boolean inputs and outputs, one per CPU. A CPU requesting bus access sets its input to 1 and waits until its output is set to 1, after which it puts its word and destination address on the bus. CPUs not requesting bus access set their bus arbitration input variable to 0.
At the beginning of each cycle the bus arbitration circuit reads the input variables and, if at least one of them has value 1, sets one output variable to 1. If all input variables are 0, it sets all output variables to 0. Design two such arbitration circuits, one that grants priority to the lowest indexed input that is 1 and a second that grants priority alternately to the lowest and highest indexed input if more than one input variable is 1.

Reference no: EM131211769

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