; this sample prints out the command line parameters. 
; in dos you simply add this line after an executable, for example: 

; paramexe p1 p2 p3 

; it is possible to set parameter in emulator  
; by selecting "set command line parameters" from the "file" menu. 

name "paramexe"

data segment
    msg db 'no command line parameters!', 0Dh,0Ah, '$'
ends

stack segment
    db  20 dup(0)
ends

code segment
start:
    ; set segment registers: 
    mov ax, data
    mov ds, ax

    mov si, 80h      ; cmd parameters offset. 

    ; copy command line to our buffer: 
    xor cx, cx      ; zero cx register. 
    mov cl, es:[si] ; get command line size. 

    cmp cx, 0       ; cx = 0 ? 
    jz  no_param    ; then skip the copy. 

    inc si          ; start printing from second byte. 
    next_char:
    mov al, es:[si]
    mov ah, 0eh     ; print out in teletype mode 
    int 10h
    inc si
    loop    next_char

    jmp exit    ; skip error message. 

    no_param:
    ; print out the error message: 
    lea dx, msg
    mov ah, 09h
    int 21h


    exit:
    ; wait for any key press... 
    mov ah, 0
    int 16h


    ; return control to the operating system: 
    mov ah, 4ch
    int 21h
ends

end start