Save, Compile and Debugging a assembly program

Bismillahir Rahmanir Rahim

Hey guys, what's up?I'm coming back.Now I'm showing you How Can compile a assembly program.
Click here to collect  some necessary files and software.

Let's consider a very simple program.

youtube:

How can compile assembly program?

At first open a text editor or notepad and write your code example:

data segment
msg db "My first assembly program. $"
data ENDs
stack segment
db 100 Dup(0)
stack ENDs
code segment
Assume cs:code,ds:data,ss:stack
start:
 mov ax,seg data
 mov ds,ax
 mov ax,seg stack
 mov ss,ax

 mov dx,offset msg
 mov ah,09h
 int 21h

 mov ax,4c00h
 int 21h

code ENDs
End start

In notepad like as

Now click file>>save as

then file name: Your_program_name.ASM  (example: hello.asm)
Save as file type: All files

hit SAVE button. One thing remember your file location will be where your asm file are stored. otherwise you have to face compiling errors.
my program link is in my pc: E:\asm

Code writing  is done!
Now Compile the program.........
Here describe two way to compile....
Using cmd command:create a folder on D: drive. Name it ASM,

Place your assembly program file, MASM.EXE, LINK.EXE, MYLIB1.LIB in this folder,

           Assemble the program with MASM.EXE, linker LINK.EXE

At DOS prompt( or cmd ) type the following !

·         Create the translated file first.obj with assembler:

·         >masm first.asm <enter><enter><enter><enter>

·         Create the executable file first.exe with linker

·         >link first.obj <enter><enter><enter><enter><enter>

·         run the executable file:

>first <enter> 

The output will be 04 as expected.

Note the length of the file is only 321 bytes. 

  

using cmd command some tips: 
for jump one drive to another drive type Drive_name: hit Enter (example: E:)
for jump one folder to another folder type cd folder_name hit enter (Example cd asm)


 In the case of Windows 7 operating system we have to use the DOSBOX package to prepare and run the program.

a.       Create a folder on D: drive. Name it ASM,

b.      Place your assembly program file, MASM.EXE, LINK.EXE, MYLIB1.LIB in this folder,

c.       Double click on DOSBOX.EXE,

d.      Type-->: mount f  d:/asm (d:/asm is your program link in your pc)

e.       Type -->:  f:

f.       Run the commands in #b.
 #

·         Create the translated file first.obj with assembler:

·         >masm first.asm <enter><enter><enter><enter>

·         Create the executable file first.exe with linker

·         >link first.obj <enter><enter><enter><enter><enter>

·         run the executable file:

>first <enter> 

The output will be 04 as expected.

Note the length of the file is only 321 bytes.

  Debugging the program: stepwise execute each instructions and inspect the values in variables.

1.      Type DEBUG nameOfExecutivefile.exe

2.      Type -u to see the code and instruction of program

3.      Type -r to see the contents of the registers and next instruction

4.      Type -t to run an instruction at a time ( single stepping ):

5.      Type -p to run procedure  type INT XX

6.      Type –g to complete the program

7.      Type -q to exit DEBUG

 Reference:

                      Dr Ehteshamul Haque (lecture)

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