02 .stack 0100h 03 04 .data 05 msg db 'HELLO', '$t 06 07 .code 08 09 xor bx, bx 10 mov c1, 4 11 mov ah, 1 12 int 21h 13 14 while : 15 стр а 1, 0dh 16 je end_while 17 18 cmp al, 39h 19 jg 1 20 21 and al, Of h 22 jmp do 23 24 1: 25 26 sub al, 37h 27 28 do : 29 30 shl bx, cl 31 or bl, al 32 33 int 21h 34 jmp while 35 36 end_while: 37 38 test bx, 1 39 jnz end 40 41 mov ah, 9 42 mov d x, offset msg 43 int 21h 44 45 end: 46 47 mov ah, 4ch 48 int 21h

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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Question

Consider following assembly language code and answer questions at end:

) Show how above-mentioned code is saved in memory in the form of segmentation (Program
segments). Draw diagram and explain it

01
- model small
02
-stack 0100h
03
04 .data
05 msg db
06
07 .code
08
09
'HELLO', '$t
хоr bx, bx
10 mov c1, 4
11
mov ah, 1
12 int 21h
13
14 while :
15 cmp a1, Odh
16 je endwhile
17
18 стр а 1, 39h
19 jg 1
20
21 and a1, Øf h
22 jmp do
23
24 1:
25
26 sub al, 37h
27
28 do:
29
30 shl bx, cl
31
or bl, al
32
33
int 21h
34 jmp while
35
36 end_while :
37
38 test bx, 1
39 jnz end
40
41 mov ah, 9
42 mov dx, offset msg
43 int 21h
44
45 end:
46
47 mov ah, 4ch
48 int 21h
Transcribed Image Text:01 - model small 02 -stack 0100h 03 04 .data 05 msg db 06 07 .code 08 09 'HELLO', '$t хоr bx, bx 10 mov c1, 4 11 mov ah, 1 12 int 21h 13 14 while : 15 cmp a1, Odh 16 je endwhile 17 18 стр а 1, 39h 19 jg 1 20 21 and a1, Øf h 22 jmp do 23 24 1: 25 26 sub al, 37h 27 28 do: 29 30 shl bx, cl 31 or bl, al 32 33 int 21h 34 jmp while 35 36 end_while : 37 38 test bx, 1 39 jnz end 40 41 mov ah, 9 42 mov dx, offset msg 43 int 21h 44 45 end: 46 47 mov ah, 4ch 48 int 21h
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