Ch 1: 4. What are the opcode, data type, and operand(s) in this instruction: MOV

Question

Ch 1:

4. What are the opcode, data type, and operand(s) in this instruction:

MOV AH,7

12. What does this instruction accomplish?

BSWAP EBX

14. Registers AX, BX, CX, and DX contain, respectively, 1111H, 2222H, 3333H, and 4444H. What are the contents of each register after this sequence of instructions?

PUSH AX

PUSH CX

PUSH BX

POP DX

POP AX

POP BX

22. If EAX contains 00000200H, EBX contains 00000003H, and the data segment contains 1000H, what is the effective address generated by these instructions?

(a) MOV ECX, [EAX]

(b) MOV ECX, [EBX] [EAX]

(c) MOV ECX, [EAX] [EBX*8]

(d) MOV ECX, [ESI] [EDI]

30. Repeat question 29 for BX equal to 9A00H.

Explanation / Answer

PLEASE ASK ONLY ONE QUESTION AT A TIME

4.

12.BSWAP EBX: It reverses the byte order of the destination register EBX i,e, 0-7 bits are swapped with 24 to 31, 8-15 bits are swapped with 16 to 23 and so on

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