4.1 Data Transfer Instructions
1 The destination operand of a MOV instruction cannot be a segment register.（MOV指令的目标操作数不能是段寄存器。）
答 ：×
2 In a MOV instruction, the second operand is known as the destination operand.（在MOV指令中，第二个操作数称为目标操作数。）
答 ：×
3 The EIP register cannot be the destination operand of a MOV instruction.（EIP寄存器不能是MOV指令的目标操作数。）
答 ：√
4 Use the following variable definitions:
.data
var1 SBYTE -4,-2,3,1
var2 WORD 1000h,2000h,3000h,4000h
var3 SWORD -16,-42
var4 DWORD 1,2,3,4,5
① What will be the hexadecimal value of the destination operand after each of the following
instructions execute in sequence?
mov al,var1
mov ah,[var1+3]
答 ：
al = FCh
ah = 01h
② For each of the following statements, state whether or not the instruction is valid:
a. mov ax,var1
b. mov ax,var2
c. mov eax,var3
d. mov var2,var3
e. movzx ax,var2
f. movzx var2,al
g. mov ds,ax
h. mov ds,1000h
答 ：
Valid : b g
Not Valid : a c d e f h
③ What will be the value of the destination operand after each of the following instructions
execute in sequence?
mov ax,var2
mov ax,[var2+4]
mov ax,var3
mov ax,[var3-2]
答 ：
ax = 1000h
ax = 3000h
ax = FFF0h
ax = 4000h
④ What will be the value of the destination operand after each of the following instructions
execute in sequence?
mov edx,var4
movzx edx,var2
mov edx,[var4+4]
movsx edx,var1
答 ：
edx = 00000001h
edx = 00001000h
edx = 00000002h
edx = FFFFFFFCh
5 In the operand notation used by Intel, what does imm16 indicate?
答 ： A 16-bit immediate (constant) operand
6 In the operand notation used by Intel, what does reg/mem32 indicate?
答 ： A 32-bit register or memory operand
7 What are the three basic types of operands?
答 ： Register, immediate, and memory