We define the effective address to be the address of the operand in a computatio

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We define the effective address to be the address of the operand in a computation-type instruction or the target address in a branch type instruction. An instruction code is a group of bits that instruct the microprocessor to perform a specific operation. It is usually divided into parts, each having its own particular interpretation. The basic part of an instruction code is its operation part (operation code). In a selective clear operation, the bit pattern in B is used to clear certain bits in A. If a bit in B is set to 1, that same position in A gets set to 0, otherwise it is unchanged. In a mask operation, the bit pattern in B is used to clear certain bits in A. If a bit in B is set to 0, that same position in A gets set to 0, otherwise it is unchanged. Register-reference instructions are recognized by the control when D_7 = 1 and I =0. These instructions use bits 0 through 11 of the instruction code to specify one of the 12 instructions. These 12 bits are available in IR(0 - 11) When a memory-reference instruction with I = 0 is encountered, it is not necessary to do anything since the effective address is already in AR. However, the sequence counter SC must be incremented when D_7 T_3 = 1 A Register-reference or input-output can be executed with the clock associated with timing signal T_3. After the instruction is executed, SC is cleared to 0 and control returns to the fetch phase with T_0 = 1. The instruction ADD adds the content of the memory word to the value of AC. The sum is transferred into AC, the C_out is transferred to E, two timing signals are used T_4 and T_5, and the operation decoder D_1 is also used. An Arithmetic shift left multiplies a signed binary number by 2 An Arithmetic shift right divides the number by 2

Explanation / Answer

1. true

2 false

3 true

4 true

5 false

6 true

7 true

8 true

9 false

10 true

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