Control Logic Gates



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The block diagram of the control logic gates is shown in Fig. 5-6. The inputs to this circuit come from the two decoders, the I flip-flop, and bits 0 through 11 of IR.

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The other inputs to the control logic are: AC bits 0 through 15 to check if AC = 0 and to detect the sign bit in AC(15); DR bits 0 through 15 to check if DR = 0; and the values of the seven flip-flops. The outputs of the control logic circuit are:

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1 Types of Operating Systems - Batch operating system, Time-sharing systems, Distributed OS, Network OS, Real Time OS link
2 Bus and Memory Transfers link
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4 Three-State Bus Buffers link
5 Memory Transfer link

1. Signals to control the inputs of the nine registers

These Topics Are Also In Your Syllabus Control Logic Gates
1 Types of Operating Systems - Batch operating system, Time-sharing systems, Distributed OS, Network OS, Real Time OS link
2 Bus and Memory Transfers -2 link
You May Find Something Very Interesting Here. Control Logic Gates link
3 Three-State Bus Buffers link
4 Memory Transfer link
5 Binary Adder link

2. Signals to control the read and write inputs of memory

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1 Types of Operating Systems - Batch operating system, Time-sharing systems, Distributed OS, Network OS, Real Time OS link
2 Complements link
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3 Complements -2 link
4 Subtraction of Unsigned Numbers link
5 Subtraction of Unsigned Numbers-2 link

3, Signals to set, clear, or complement the flip-flops

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1 Types of Operating Systems - Batch operating system, Time-sharing systems, Distributed OS, Network OS, Real Time OS link
2 Decimal Fixed-Point Representation link
You May Find Something Very Interesting Here. Control Logic Gates link
3 Floating-Point Representation link
4 Floating-point representation link
5 Other Binary Code link

4. Signals for 52, 51, and 50 to select a register for the bus

5. Signals to control the AC adder and logic circuit

The specifications for the various control signals can be obtained directly from the list of register transfer statements.


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