Problem 2 : Code Analysis

• Assume that registers contain the following values:

  Reg. Value (hex) AX 0111 BX 0022 CX 0003 DX 0400

  Reg. Value (hex) SI 0001 DI 0002 BP 0003 ES 0004

  • Part 1: Analyze the following code and determine the final values for AX, BX, CX, and DX.
    Show your work to the right of the code. Enter your results in the boxes below.

    XOR AH,AL NOT BH SUB BL,BH ADC CH,2 ROR DH,CL

  • Part 2: Analyze the following code and determine the final values for SI, DI, BP, and ES.
    Show your work to the right of the code. Enter your results in the boxes below.

    PUSH ES PUSH DI POP ES PUSH BP POP DI PUSH ES POP SI POP SI

  • Enter the final values of the registers after executing the code in parts 1 and part 2.

    Reg Value (hex) AX BX CX DX

    Reg Value (hex) SI DI BP ES

    (3 pts/each = 24 pts)

• Using the initial values of the registers (given at the top of the page), Write an opcode that would simultaneously set the carry flag and clear the overflow flag (3pts)

  
  
  

• Using the initial values of the registers (given at the top of the page), Write an opcode that would simultaneously set the carry flag and set the zero flag (3pts)