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1. What will be the value in EDX after each of the lines marked (a) and (b) execute? .data one WORD 8002h two WORD 4321h .code mov edx, 21348041h movsx edx, one movsx edx, two 2. What will be the value in EAX after the following lines execute? mov eax, 30020000h dec ax ; (a) ; (b) 3. What will be the value of the Parity flag after the following lines execute? mov al, 1 add a1,3

1. What will be the value in EDX after each of the lines marked (a) and (b) execute? .data one WORD 8002h two WORD 4321h .code mov edx, 21348041h movsx edx, one movsx edx, two 2. What will be the value in EAX after the following lines execute? mov eax, 30020000h dec ax ; (a) ; (b) 3. What will be the value of the Parity flag after the following lines execute? mov al, 1 add a1,3

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1. What will be the value in EDX after each of the lines marked (a) and (b) execute? .data one WORD 8002h two WORD 4321h .code mov edx, 21348041h movsx edx, one movsx edx, two 2. What will be the value in EAX after the following lines execute? mov eax, 30020000h dec ax ; (a) ; (b) 3. What will be the value of the Parity flag after the following lines execute? mov al, 1 add al, 3
Transcribed Image Text:1. What will be the value in EDX after each of the lines marked (a) and (b) execute? .data one WORD 8002h two WORD 4321h .code mov edx, 21348041h movsx edx, one movsx edx, two 2. What will be the value in EAX after the following lines execute? mov eax, 30020000h dec ax ; (a) ; (b) 3. What will be the value of the Parity flag after the following lines execute? mov al, 1 add al, 3
Expert Solution
Step 1: 1st Solution

1)

8002=10000000 00000010 (16 bit). Sign is negative

4321=01000011 00100001 (16 bit) Sign is positive

MOVSX copies the content of the source operand into the destination operand. Also extends the sign from 16-bit to 32-bit.

.data

EDX

one WORD 8002h

 

two WORD 4321h

 

.code

 

mov   edx,21348041h

21348041h

(00100001 00110100 10000000 01000001b)

movsx edx,one

FFFF8002h

(11111111 11111111 10000000 00000010b)

movsx edx,two

00004321h

(00000000 00000000 01000011 00100001 b)

 

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