Write the content of al register, after executing each instruction. Show the computation.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Assume that currently overflow flag, OF = 0,

carry flag, CF = 0, zero flag, ZF = 1, and sign flag, SF = 1.

Now consider the following code segment.

mov al, 118

add al, 15 rcl al, 2 and al, 5

;OF=?, CF=?, SF=?, ZF=?

; OF=?, CF=?, SF=?, ZF=? ;OF=?, CF=?, SF=?, ZF=?

Write the content of al register, after executing each instruction. Show the computation. (1 point for each instruction)

Write the value of the Carry Flag (CF), Overflow Flag (OF), Sign Flag (SF), and Zero Flag (ZF),

after executing each instruction. (0.5 points for each flag). No points if you don't provide any explanation for flags.

 

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