1. In an 8-bit binary number, which is the most significant bit (MSB)? 2. In the

Question

1. In an 8-bit binary number, which is the most significant bit (MSB)? 2. In the following code, the value in AL is intended to be a signed byte. Explain how the Overflow flag helps, or does not help you, to determine whether the final value in AL falls within a valid signed range. mov al,-1 add al,130 3. Trace the following program: 1: main PROC 2: mov eax,5 3: add eax,6 4: sub eax, 6 5: mov ebx, eax what is the value in eax= and in ebx= 4. At which level/s can an assembly language program manipulate input/output? use up to eight floating-point registers. 6. What is a calling convention, and how is it used in assembly language declarations? 7.How do you reserve space for the stack in a program?

Explanation / Answer

1- In 8 bit binary number the right most bit is the MSB .

For ex- consider a 8 bit binary number as 01111111 here the right most bit is 0 which is the MSB of the number.

MSB represnts the sign of a number in sign magnitude representation means it tells whether a no is positive or negative.

If MSB =0 the number is positive.

If MSB=1 the number is negative.

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