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1. Wite a program to exchange the contents of memory locations 2050H and 2370H using STA...

1. Wite a program to exchange the contents of memory locations 2050H and 2370H using STA and LDA instructions.

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Expert Solution

Exchange the contents of memory locations 2050H and 2370H.

Program 1:

  1. LDA 2050H : "Get the contents of memory location 2050H into accumulator"
  2. MOV B, A : "Save the contents into B register"
  3. LDA 2370H : "Get the contents of memory location 2370Hinto accumulator"
  4. STA 2050H : "Store the contents of accumulator at address 2050H"
  5. MOV A, B : "Get the saved contents back into A register"
  6. STA 2370H : "Store the contents of accumulator at address 2370H"

Program 2:

  1. LXI H 2050H : "Initialize HL register pair as a pointer to memory location 2050H."
  2. LXI D 2370H : "Initialize DE register pair as a pointer to memory location 2370H."
  3. MOV B, M : "Get the contents of memory location 2050H into B register."
  4. LDAX D : "Get the contents of memory location 2370H into A register."
  5. MOV M, A : "Store the contents of A register into memory location 2050H."
  6. MOV A, B : "Copy the contents of B register into accumulator."
  7. STAX D : "Store the contents of A register into memory location 2370H."
  8. HLT : "Terminate program execution."

venereology answered 7 months ago
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