tasm to fasm?

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godomega

Joined: 21 Jun 2005
Posts: 8

godomega 21 Jun 2005, 09:08

At the moment Im learning ASM from a tutorial.
And I allways used Tasm, in the tutorial the writers says that all his tutorial code is in Tasm format...
ButIi think he's using an old version of tasm(I use 5.0),
becausse I cannot compile his code in my tasm compiler.
the strange thing is that the Masm code he also provides is compilable in tasm...
but in chapter 9, the hello world example, he doesn't include mams format anymore..

so now my quistion is can anyone tell me how to translate this in Fasm format?
and why it issn't working in my tasm compiler..?

Code:

ideal
p286n
model tiny

codeseg
   org 100h
   jmp start

   message db 'Hello World!$'
start:
   mov dx, offset message
   mov ah, 09
   int 21h

   mov ax, 4c00h
   int 21h
end

and can you create COM structures in fasm?

.. thanks Rolling Eyes

21 Jun 2005, 09:08

smiddy

Joined: 31 Oct 2004
Posts: 557

smiddy 21 Jun 2005, 09:46

First, I'll translate this for you:

Code:

   org 100h 
   jmp start 

   message db 'Hello World!$' 
start: 
   mov dx, message 
   mov ah, 09 
   int 21h 

   mov ax, 4c00h 
   int 21h

You would compile this like this: FASM HELLO.ASM HELLO.COM

I suggest you read the online documentation here: http://flatassembler.net/docs.php This should answer most of your questions and be a great primer for those you will ask in the future. Wink

21 Jun 2005, 09:46

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 21 Jun 2005, 10:02

Code:

org 100h
   jmp start
   message db 'Hello World!$'
start:
   mov dx, message  ;NOTE - no OFFSET
   mov ah, 09 
   int 21h 

   mov ax, 4c00h 
   int 21h

no need to mess with segmnets in .COM program (tiny model)

read http://flatassembler.net/docs.php?article=design

21 Jun 2005, 10:02

godomega

Joined: 21 Jun 2005
Posts: 8

godomega 21 Jun 2005, 15:34

Thanks for your help..
but Why didn't my code worked in my tasm compiler?
(i'll still use fasm though Wink

)

21 Jun 2005, 15:34

smiddy

Joined: 31 Oct 2004
Posts: 557

smiddy 21 Jun 2005, 16:10

I don't know...I'll have to give it a shot when I get home. If Bogdan is listening he could probably help you with TASM though. His web site is: http://www.hostileencounter.com/os_main.html His OS is written in TASM and may give you some insight on the issues. I have only used TASM very little and it was 1989-ish. Pre-protected-mode too in my programming style.

21 Jun 2005, 16:10

decard

Joined: 11 Sep 2003
Posts: 1092
Location: Poland

decard 21 Jun 2005, 18:28

I'm not sure, but maybe this line causes an error:

Code:

mov dx, offset message

In Ideal mode it should be:

Code:

mov dx, message

But I can't check it myself, I don't have tasm.

21 Jun 2005, 18:28

smiddy

Joined: 31 Oct 2004
Posts: 557

smiddy 22 Jun 2005, 01:56

Using TASM 4.1 I got this:

Code:

C:\smiddyOS\SolarOS-3>..\tasm5.0\tasm hello.asm
Turbo Assembler  Version 4.1  Copyright (c) 1988, 1996 Borland International

Assembling file:   hello.asm
Error messages:    None
Warning messages:  None
Passes:            1
Remaining memory:  418k

That is with the initial code you have in the first post. What is the error you're receiving and what version are you using?

22 Jun 2005, 01:56

godomega

Joined: 21 Jun 2005
Posts: 8

godomega 24 Jun 2005, 14:16

thanks for the replies:
im using Tasm 5 and i get the error While linking. not when compiling.
so when i Tlink my code with COM structure.
i get this:

(tlink /t hello.obj)
Fatal: Cannot generate COM file : invalid initial entry point address

24 Jun 2005, 14:16

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