Simple question

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slovach

Joined: 14 May 2007
Posts: 4

slovach 30 Jul 2008, 05:01

I'm pretty ASM retarded, but I've been goofing with it lately since I'm interested in ultimately getting a better understanding of things.

Code:

org $0100
use16

mov     ah, $02

print:
        mov     dl, [hello + bx]
        int     $21
        inc     bx
        cmp     bx, 5
        jne     print

int     $20

hello db 'hello', $24

What's a smarter way of counting, so I don't have to do it myself? I'm used to sizeof() being available.

Feel free to tell me if I'm doing anything stupid / if anything can be bettered.

30 Jul 2008, 05:01

Kenneth

Joined: 16 Nov 2005
Posts: 38
Location: United States of America

Kenneth 30 Jul 2008, 05:25

Code:

org $0100
use16

mov     ah, $02

print:
        mov     dl, [hello + bx]
        int     $21
        inc     bx
        cmp     bx, hello.size
        jne     print

int     $20

hello db 'hello', $24
hello.size = $ - hello  ;current offset - address of hello

Or you can just use this

Code:

struc db [bytes]
{
common
  . db bytes

.size = $ - .
}

30 Jul 2008, 05:25

DOS386

Joined: 08 Dec 2006
Posts: 1905

DOS386 23 Aug 2008, 07:33

slovach wrote:

Code:
hello db 'hello', $24    
What's a smarter way of counting

1. Why the $24 -> dollar "$" ? Do you want to see "hello$" ??? Confused

PS: prefixing hex numbers with dollar is good Smile

Code:

txhello db 'hello', 0

and compare against 0 before printing the char Idea

23 Aug 2008, 07:33

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