Write without INT 21h???

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joachim_neu

Joined: 22 Dec 2003
Posts: 139

joachim_neu 25 Dec 2003, 16:51

hello,

how do you write a string without interrupt 21h??

JOACHIM NEU

25 Dec 2003, 16:51

decard

Joined: 11 Sep 2003
Posts: 1092
Location: Poland

decard 25 Dec 2003, 16:59

You can use for example 0x0e function form int 0x10. Try this:

Code:

        mov     si,szText
   mov     ah,0x0e
     mov     bx,0x0007
  .more:
   lodsb
       or      al,al
       jz      .done
       int     0x10
        jmp     .more
  .done: 

(...)

szText db "some text", 0

25 Dec 2003, 16:59

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 25 Dec 2003, 18:08

things which are visible on screen are stored in segment B800. Each character is described by 2 bytes. First is ASCII code of character, second is it's color and background. You should search something about segment B800 on net.

25 Dec 2003, 18:08

joachim_neu

Joined: 22 Dec 2003
Posts: 139

joachim_neu 26 Dec 2003, 12:43

hello,

I've found a solution:

Code:

mov ah,0fh
int 10h
mov dl,01h
mov dh,01h
mov ah,02h
int 10h
mov ah,09h
mov cx,01h
mov al,ASCII-CODE in HEX
mov bl,0007h
int 10h
mov ah,0fh
int 10h
mov dl,01h
mov dh,01h
mov ah,02h
int 10h
mov ah,09h
mov cx,01h
mov al,ASCII-CODE in HEX
mov bl,0007h
int 10h

It's very long... Embarassed

I've done it 2 ones, 'cause with only 1 it doesn't work.

JOACHIM NEU

26 Dec 2003, 12:43

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