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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1 Types of Operating Systems - Batch operating system, Time-sharing systems, Distributed OS, Network OS, Real Time OS link
2 Control Logic Gates link
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5 Control of Common Bus link

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 Decimal Fixed-Point Representation link
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3 Floating-Point Representation link
4 Floating-point representation link
5 Other Binary Code 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 Common Bus System link
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3 Common Bus System-memory address link
4 Computer Instructions link
5 Instruction Set Completeness 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 Input-Output and Interrupt link
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3 Input - output Register link
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5 Types Of Systems link

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

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 Timing and Control link
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3 Timing and Control -2 link
4 Instruction Cycle link
5 Fetch and Decode 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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