The content of AC in the basic computer is hexadecimal A937 and the initialvalue of E is 1. Determine the contents of AC, E, PC, AR, and IR in hexadecimalafter the execution of the CLA instruction. Repeat 11 more times, starting fromeach one of the register-reference instructions. The initial value of PC is hexa-decimal 021

To determine the contents of AC, E, PC, AR, and IR after the execution of the CLA instruction, we will follow the given steps:

1. Initial values:

   • AC = A937
   • E = 1
   • PC = 021
   • AR = (not specified)
   • IR = (not specified)

2. CLA instruction:

   • CLA stands for "Clear Accumulator".
   • It clears the content of the AC register, setting it to zero.

3. After the execution of the CLA instruction:

   • AC = 0000 (cleared)
   • E remains unchanged at 1
   • PC remains unchanged at 021
   • AR and IR are not affected by the CLA instruction and their values remain unspecified.

Now, let's repeat the process 11 more times, starting from each one of the register-reference instructions:

1. LDA instruction:

   • LDA stands for "Load Accumulator".
   • It loads the content of a memory location into the AC register.

2. STA instruction:

   • STA stands for "Store Accumulator".
   • It stores the content of the AC register into a memory location.

3. ADD instruction:

   • ADD stands for "Add to Accumulator".
   • It adds the content of a memory location to the AC register.

4. SUB instruction:

   • SUB stands for "Subtract from Accumulator".
   • It subtracts the content of a memory location from the AC register.

5. MUL instruction:

   • MUL stands for "Multiply Accumulator".
   • It multiplies the content of the AC register by a value in a memory location.

6. DIV instruction:

   • DIV stands for "Divide Accumulator".
   • It divides the content of the AC register by a value in a memory location.

7. AND instruction:

   • AND stands for "Logical AND with Accumulator".
   • It performs a logical AND operation between the content of the AC register and a value in a memory location.

8. OR instruction:

   • OR stands for "Logical OR with Accumulator".
   • It performs a logical OR operation between the content of the AC register and a value in a memory location.

9. NOT instruction:

   • NOT stands for "Logical NOT of Accumulator".
   • It performs a logical NOT operation on the content of the AC register.

10. JMP instruction:

    • JMP stands for "Jump to a memory location".
    • It changes the value of the PC register to the specified memory location.

11. HLT instruction:

    • HLT stands for "Halt the program".
    • It stops the execution of the program.

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