2. Given the following data declarations: .data Alpha BYTE 2Bh, 23h, 4Ah Beta DW

Question

2. Given the following data declarations: .data Alpha BYTE 2Bh, 23h, 4Ah Beta DWORD 222h Delta DWORD 312h Iota DWORD 434h Zeta WORD 124h A. Write instructions that move Beta into EAX and then adds Beta to the same register B. Write a set of instructions that adds all the elements of the array Alpha into AL c. Write a set of instructions that moves Beta into EAX, adds the value stored in Zeta to the same register D. Write an instruction that moves the last two bytes in ALPHA into CX. E. What are the contents of CX subsequent to part D of this question?

Explanation / Answer

FIRSTLY HAVE A BASIC IDEA OF ALL THE IMPORTANT INSTRUCTIONS THEN GO THROUGH THE ANSWERS. ANY FURTHER QUERIES COMMENT PLZZ!!

A. MOV EAX,Beta

ADD EAX,beta

B.LEA SI,Alpha //POINTS TO STARTING ADDRESS OF THE ARRAY Alpha

MOV Al,[SI]

GO:ADD AL,[SI]

INC SI

JNZ GO

C.MOV EAX,Beta

MOV EBX,Zeta

ADD EBX,Zeta

D.LEA SI,ALPHA

MOV A,[SI]

INC SI

MOV CX,[SI]

INC SI

MOV CX,[SI]

E. CX has only the last two vaues of Alpha

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