Basic Instructions

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Answer the following questions:

a. For each part of this problem, assume the “before” values when the given instruction is executed. Give the requested “after” values.

Before	Instruction	After
1. EBX: 00 00 01 A2	mov eax, 100	EAX

b. For each part of this problem, assume the “before” values when the given instruction is executed. Give the requested “after” values.

Before	Instruction	After
DX: 01 4B	add dx, 40h	DX, SF, ZF, CF, OF

c. For each part of this problem, assume the “before” values when the given instruction is executed. Give the requested “after” values.

Before

Instruction

After

EBX: FF FF FF 75

ECX: 00 00 01 A2

sub ebx, ecx

EBX, ECX, SF, ZF, CF, OF

d. For each part of this problem, assume the “before” values when the given instruction is executed. Give the requested “after” values.

Before

Instruction

After

EAX: FF FF FF E4

EBX: 00 00 00 02

mul ebx

EAX, EDX, CF, OF

e. For each part of this problem, assume the “before” values when the given instruction is executed. Give the requested “after” values.

Before

Instruction

After

AX: FF 75

byte at count: FC

div count

Assignment is also attached in file.

basic_instructions.docx

11 years ago
22.02.2015
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