What will be the value of EAX and sign flag after the following lines execute?
Mov eax, 6
Sub eax, 5 ;
B. Is it possible to set the overflow flag if you add a negative integer to a negative integer? Explain with examples where applicable.
C. Is it possible for both the sign and zero flags to be set at that same time? State reasons.
D. In the following code, the value in AL is intended to be a signed byte. Does the overflow flag help to determine whether the final value in AL is within a valid signed range? Explain.
mov al, -1 ;
add al, 130 ;
E. What will be the value of the parity flag after the following lines execute?
Mov al, 2
Add al, 5 ;
Given the following data declarations:
Alpha BYTE 1Ah, 2Bh, 3Ch, 4CH
Beta DWORD 11223344h
Delta DWORD 44332211h
Iota DWORD 434h
Zeta WORD 124h
Write instructions that move Delta into ECX and then adds Beta to the same register
Write a set of instructions that adds all the elements of the array Alpha into AL
Write a set of instructions that moves Beta into EAX, adds the value stored in Zeta to the same register
Write an instruction that moves the last two bytes in ALPHA into AX.
What are the contents of AX subsequent to part D of this question?
Fill in the requested register values after executions of the instructions:
Show the memory map.
myBytes BYTE 11h, 22h, 33h, 44h
myWords WORD 1234h, 5678h, ABCDh, EF01h, 2345h
myDoubles DWORD AB23h, BC34h, CD54h, 8967h, 6F6Ah
myPointer DWORD myDoubles
mov esi, OFFSET myBytes
mov ax, WORD PTR [esi+2] ; A. AX =
mov eax, DWORD PTR myWords ; B. EAX =
mov esi, myPointer
mov ax, WORD PTR [esi+8] ; C. AX =
mov ax, WORD PTR [esi+1] ; D. AX =
mov ax, WORD PTR [esi-6] ; E. AX =
What is the value of ax after the follow:
myArray DWORD 7 DUP (2), 21, 4, 65, 0CDE
mov ax, TYPE myarray
mov ax, lengthof myarray
mov ax, sizeof my array
Fill in the requested register values after executions of the instructions (Do not let your eyes deceive you. There are some movSx instructions and some movZx instructions.):
mov bx, 0B24Ch
movzx eax, bx ; A. EAX =
movzx edx, bl ; B. EDX =
movzx cx, bh ; C. CX =
mov bx, 0D3C2h
movsx eax, bx ; D. EAX =
movsx edx, bl ; E. EDX =
movsx cx, bh ; F. CX =
What will be the value of the destination operand after each of the following instructions execute?
var1 SBYTE -4, -2, 3, 1
var2 WORD 1000h, 2000h, 3000h, 4000h
var3 SWORD -16, -42
var4 DWORD 1, 2, 3, 4
mov ax, var2 AX =
mov ax, [var2+4] AX =
mov ax, var3 AX =
mov ax, [var3-2] AX =