interupt 21 dl=10

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xddxogm3

Joined: 09 Nov 2005
Posts: 12

xddxogm3 12 Nov 2005, 03:22

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.

12 Nov 2005, 03:22

vbVeryBeginner

Joined: 15 Aug 2004
Posts: 884
Location: \\world\asia\malaysia

vbVeryBeginner 12 Nov 2005, 07:43

what ah function are you using?

12 Nov 2005, 07:43

xddxogm3

Joined: 09 Nov 2005
Posts: 12

xddxogm3 12 Nov 2005, 20:20

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]

12 Nov 2005, 20:20

Matrix

Joined: 04 Sep 2004
Posts: 1164
Location: Overflow

Matrix 21 Nov 2005, 15:56

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

21 Nov 2005, 15:56

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