8086汇编创建文件并写入内容

Posted 2021-12-07 u25th_engineer

图 1程序编译前

图 2 程序编译后

图 3 程序运行后

图 4 用edit打开所创建的文件

图 5 查看文件内容

图 6 查看文件内容

stack	segment stack
        db 512 dup(?)
stack		ends

data segment
    filename db 'motto.txt',0
    fhandle dw ? 
    buff db "There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy. $" ;"8086 ALP $"
data ends


code segment
	assume cs:code, ss:stack, ds:data
start:
	mov ax, stack
	mov ss, ax
    mov ax,data
    mov ds,ax
    
    mov ah,3ch;set function number to crate filename 
    xor cx,cx ;make contents of cx all zero
    mov dx,seg filename;mov segment address of filename in which 
    mov ds,dx; it is appearing, to register dx  and then to ds
    mov dx,offset filename; points to filename
    int 21h;call software interrupt of type 21 h
    
    mov ah,3dh;set function number to open file  
    mov al,1 ; set file access mode as 1 i.e. write access
    mov dx,seg filename;mov segment address of filename in which
    mov ds,dx; it is appearing, to register dx  and then to ds
    mov dx,offset filename;points to filename
    int 21h; call sofrware interrupt of type 21h 
    mov fhandle,ax; mov flie handler of file motto.txt to fhandle 
     
    mov ah,40h;mov function number to ah to write into file
    mov dx,seg buff;mov segment address of buff in which
    mov ds,dx;it is appearing, to register dx  and then to ds
    mov dx,offset buff; points to buff
    mov bx,fhandle;mov flie handler of file motto.txt to fhandle  
    mov cx, 90;8; specify number of butes to write into file
    int 21h;call software interrupt of type 21h to write into file 
    
    mov ah,3eh;set function number to close file
    mov bx,fhandle; move fhandle to bx 
    int 21h; call software interruopt of the type 21h to close file
	
	mov ah, 4ch
	int 21h
code ends
	end start