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Index > DOS > interupt 21 dl=10

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xddxogm3



Joined: 09 Nov 2005
Posts: 12
xddxogm3
display character of 10h = "data link escape"
what does data link escape do?
i found it in a snippin of code that creates a carriage return.
Post 12 Nov 2005, 03:22
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vbVeryBeginner



Joined: 15 Aug 2004
Posts: 884
Location: \\world\asia\malaysia
vbVeryBeginner
what ah function are you using?
Post 12 Nov 2005, 07:43
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xddxogm3



Joined: 09 Nov 2005
Posts: 12
xddxogm3
Code:
mov ah, 2
    


this is a excerpt from a carriage return module.
you print out two ascii characters first the carriage return, then the data link escape

full code of module
Code:
CRLF:
        push    ax 
        push    dx

        mov     ah,2    ;assign 2 to ah register (output character)
        mov     dl,13   ;print carriage return
        int     21h     ;doit
        mov     dl,10   ;print data link escape
        int     21h     ;doit

        pop     dx 
        pop     ax 

ret 
    

[/code]
Post 12 Nov 2005, 20:20
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Matrix



Joined: 04 Sep 2004
Posts: 1171
Location: Overflow
Matrix
this is a print char function,
dl means the code of the byte to be put to screen at cursor position,

13 = $0d this means carrige return - CR, moves to beginning of line

10= $0a this is line feed - LF, moves 1 line down
Post 21 Nov 2005, 15:56
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