.model small .data str1 db 10h dup(0) ; will save filename in this buff db 1h dup(0) ; buffer to save data str2 db 10,13,'File Not Found $' ; will print this in case file not found .code mov ax,@data mov ds,ax mov ah,62h ; reading psp contents int 21h mov es,bx mov si,0080h ; 80h contains the lenght of command tail mov al,es:[si] mov cl,al dec cl mov si,0082h ; 82h starts the text of command tail lea di,str1 ; saving it in str1, in this case the filename read: mov al,es:[si] mov [di],al inc si inc di loop read mov ah,3dh ; opening the file using 3dh of int 21h lea dx,str1 ; dx contain the filename in ASCIIZ format, i.e 0's at the end int 21h jnc mylabel ; there is carry generated if any error mov ah,09h ; printing str2 on error else skip lea dx,str2 int 21h mylabel: mov bx,ax ; file handle of the open file is stored in AX, need to move it in BX to read the open the file with handle AX, better store AX somewhere label1: mov ah,3fh mov cx,0001h lea dx,buff ; reading data in buff of size 1 int 21h cmp ax,0000h ; printing till ax=0000h, i.e end-of-file jz end1 ; will break and jump to end1 label on end of file mov cx,0001h lea si,buff ; printing data in buff label2: mov dl,[si] mov ah,02h ; interrupt on print on screen int 21h inc si loop label2 jmp label1 end1: mov ah,4ch ; normal end of any assembly program int 21h end
Simulation of Type dos command in 8086 assembly
Page 1 of 11 Replies - 2782 Views - Last Post: 01 April 2012 - 06:01 AM
#1
Simulation of Type dos command in 8086 assembly
Posted 04 November 2010 - 10:43 PM
Description: The code can be directly copied. To run compile the code using TASM and then make the exe using TLINK. After exe is made, run the exe with filename of existing text file with extension.It is simulation of type command of dos..which is used to read the contents of file and display it on screen
Replies To: Simulation of Type dos command in 8086 assembly
#2
Re: Simulation of Type dos command in 8086 assembly
Posted 01 April 2012 - 06:01 AM
even if we remove the lines mov ah,62h int 21h this code works..what is the reason behind this???
Page 1 of 1