problem with printing array data

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majidkamali1370

Joined: 31 Oct 2010
Posts: 50
Location: Iran

majidkamali1370 19 Nov 2011, 18:32

Hi.
Here's my code:

Code:

org 100h
jmp start

include "0Header.inc"

arraydata db 5 dup ("Hello!")

start:
        mov si, 0
        forLoop:
                PrintChar [arraydata + si]
                inc si
                cmp si, 30  ; <-- commented line
                jb forLoop
int 20h

PrintChar is defined in 0Header.inc file like below:

Code:

macro PrintChar ch
{
        pusha
        mov dl, ch
        mov ah, 2h
        int 21h
        popa
}

when I add

Code:

size db $ - arraydata

below arraydata definition and change commented line with this,

Code:

cmp si, size

, it prints some bullshit after printing array data. I don't know where it comes from.

What's the problem?

Thanks and excuse Very Happy

19 Nov 2011, 18:32

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 19 Nov 2011, 19:29

majidkamali1370 wrote:

when I add
Code:
size db $ - arraydata    
below arraydata definition and change commented line with this,
Code:
cmp si, size    
, it prints some bullshit after printing array data. I don't know where it comes from.

What's the problem?

Hi,
You compare si value with size address.

Try this

Code:

   arraydata db 5 dup ("Hello!") 
   size = $ - arraydata
   ;
   ;
   ;
   cmp si, size

or this

Code:

   arraydata db 5 dup ("Hello!") 
   size dw $ - arraydata
   ;
   ;
   ;
   cmp si, [size]

Last edited by Picnic on 19 Nov 2011, 19:50; edited 1 time in total

19 Nov 2011, 19:29

majidkamali1370

Joined: 31 Oct 2010
Posts: 50
Location: Iran

majidkamali1370 19 Nov 2011, 19:47

Thanks

19 Nov 2011, 19:47

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