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8/2/2019 Masm Program 11
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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
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3. In that window change the directry [Where you paste the masmsoftware]
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4.In the command window type the directory name after that change the
directory to 8086(masm) after that type edit
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5.After changing directory type edit then you get one window in that window
you can write a program
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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]
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8.Type: link filename,,; [This will create a list file you can see this
inside the masm(8086)software]
Note : Here we no need to use stack segment so no need to worry about
stack error
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8.Type : debug filename.exe [to create exe file]
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9.Type : n filename.bin [to create a bin file]
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10.Type : wcs:1000 [writing code segment]
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11.Type : g =1000 [to execute a program]
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12. Type : u 1000[to see opcode]
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13.Type : e 1200 [see output in corresponding address] use space bar
to see next output value
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15.Type : q [terminate a line]
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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
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17. press f1 key and set the port settings
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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.
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PROGRAMS:
Write an alp to display a string manupulation in the monitor
Code segment
Assume cs: code, ds: codeOrg 1000h
Mov ah, 09h
Mov dx, 1200h
Int 21h
Mov ah, 4ch
Int 21h
Org 1200h
Db VI micro$
Code endsEnd
------------------------------------------------------------------------------------------------------------------
Write an alp to read scan code and character code from a keyboard control
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
-----------------------------------------------------------------------------------------
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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
Write an alp to create a directory using dos calls
code segment
assume cs:code,ds:data
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
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Create a file in a different directory:
code segment
assume cs:code,ds:code
org 1000h
mov ax,datamov 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
File rename[Find and replace]
code segment
assume cs:code,ds:data,es:data
org 1000hmov ax,data
mov 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
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newname db 'service.txt'
data ends
end
File deletioncode segment
assume cs:code,ds:code
org 1000h
mov ax,data
mov ds,ax
mov ah,41h
mov dx,1200h
int 21hmov ah,4ch
int 21h
code ends
data segment
org 1200h
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
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lea dx,buffer
mov cx,0050h
mov bx,[si]
int 21h
mov 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
Addition:code segment
assume cs:code,ds:code
org 1000h
mov ax,1234h
mov bx,1234h
add ax,bxmov si,1200h
mov [si],ax
mov ah,4ch
int 21h
code ends
end
Result:e 1200=68 24