Masm Procedure

7/29/2019 Masm Procedure

1/23

PC PROGRAMMING WITH ASSEMBLY LANGUAGE USING

MASM

Procedure:

1. Open command window (click: start->run->type cmd )

2. Paste the 8086 or MASM software in any drive


2/23

3. In that window change the directry


3/23

4.In the command window type the directory name after that change thedirectory to 8086(masm) after that type edit


4/23

5.After changing directory type edit then you get one window in that

window you can write a program


5/23

6.After writing a program click: file->save->exit [again we enter the

commond window]

7.Type : masm filename,,; [this will display the error report]


6/23

8.Type: link filename,,; [This will create a list file you can see thisinside the masm(8086)software]

Note : Here we no need to use stack segment so no need to worry about

stack error


7/23

8.Type : debug filename.exe [to create exe file]


8/23

9.type: n filename.bin[to create a bin file]


9/23

10.type : wcs:1000 [writing code segment]


10/23

11.type:g =1000[to execute a program]


11/23

12.type: u 1000[to see opcode]


12/23

13.type : e 1200[see output in corresponding address] use space bar to see

next output value


13/23

15.type: q [terminate a line]


14/23

16. down loading procedure

Note: dont use these command while down loading

Mov ah, 4ch [These commands are used to see the results system itself]Int 21h

( bin file is used to down loading )

Type: dc then you can get the following window


15/23

17. press f1 key and set the portsetings


16/23

18.press esc key to abort

19.now in micro 86 kit select receiving mode(ie) type si 1000(starting

address) then press enter key. Then the kit is ready to receive data and

press any in the host to start transmission. During transmisson the

message display as ,

transmission progress.

Press esc to abort.

Now binary files are downloaded to kit.


17/23

Write an alp to display a string in the monitor

Code segment

Assume cs: code, ds: code

Org 1000hMov ah, 09h

Mov dx, 1200h

Int 21h

Mov ah, 4ch

Int 21h

Org 1200h

Db VI micro$

Code ends

End------------------------------------------------------------------------------------------------------------------

Write an alp to read scan code and character code from a keyboard

Code segment

Assume cs: code, ds: code

Org 1000h

Mov ah, 0h

Int 16h

Mov si, 1200h

Mov [si], al

Inc si

Mov [si], ah

Mov ah, 4ch

Int 21h

Code ends

End

-----------------------------------------------------------------------------------------


18/23

File manipulation:

File creation

code segment

assume cs:code,ds:code

org 1000hmov ax,data

mov ds,ax

mov ah,3ch

mov cx,0000h

mov dx,1200h

int 21h

mov ah,4ch

int 21h

code ends

data segment

org 1200h

db 'vi.asm'

data ends

end

Create a file in a different directory:

code segment


org 1000hmov ax,data

mov ds,ax

mov ah,5bh

mov dx,1200h

mov cx,0

int 21h

mov ah,4ch

int 21h

code ends

data segment

org 1200h

db 'e:\man\v.asm'

data ends

end


19/23

File rename[Find and replace]

code segment

assume cs:code,ds:data,es:data

org 1000h

mov ax,datamov ds,ax

mov es,ax

mov dx,1300h

mov [di],1500h

lea dx,oldname

lea di,newname

mov ah,56h

int 21h

mov ah,4ch

int 21h

code ends

data segment

org 1300h

oldname db 'vi.txt'

org 1500h

newname db 'service.txt'

data ends

end

File deletion

code segment


org 1000h

mov ax,data

mov ds,ax

mov ah,41h

mov dx,1200h

int 21h

mov ah,4ch

int 21h

code ends

data segment

org 1200h


20/23

db 'vi.asm'

data ends

end

---------------------------------------------------------------------------------------------------------

Write an alp to writing datas to a file

code segment

assume cs:code,ds:data

org 1000h

mov ax,data

mov ds,ax

mov ah,3dh

mov al,01h

lea dx,filename

int 21h

mov si,1500h

mov [si],ax

mov ah,40h

lea dx,buffer

mov cx,0050h

mov bx,[si]

int 21hmov ah,3eh

int 21h

mov ah,4ch

int 21h

code ends

data segment

org 1300h

filename db 'vi.txt'

org 1400h

buffer db 'vimicro systems'

data ends

end


21/23

Write an alp to send an 8 bit data to serial port

code segment


org 1000hmov ah,00h

mov dx,0

mov al,0e2h

int 14h

mov ah,01h

mov al,"A"

mov dx,0

int 14h

mov ah,4chint 21h

code ends

end

The baud rate is 9600 bps

The number of the port is defined in register DX

Print a character using Pc's parallel port with dos calls

code segment


org 1000h

mov ah,00h

mov dx,0mov al,"A"

int 17h

mov ah,4ch

int 21h

code ends


22/23

end

Write an alp to read the CMOS time using dos calls

code segment


org 1000hmov ah,02h

int 1ah

mov si,1200h

mov [si],ch

inc si

mov [si],cl

inc si

mov [si],dh

mov ah,4ch

int 21h

code ends

end

Write an alp to create a directory using dos calls

code segment


org 1000h

mov ax,data

mov ds,ax

mov ah,39h

mov dx,1200h

int 21h

mov ah,4ch

int 21h

code ends

data segment

org 1200h

db 'man'

data ends

end


23/23

Write an alp to show the mouse pointer in the dos window screen

code segment


org 1000h

mov ax,1

int 33h

mov ah,4ch

int 21h

code ends

end

Addition: code segment


org 1000h

mov ax,1234h

mov bx,1234h

add ax,bx

mov si,1200h

mov [si],ax

mov ah,4ch

int 21h

code ends

end

Result:

e 1200=68 24

Documents

Masm Procedure