Running programs

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kazsemisonic

Joined: 22 Aug 2005
Posts: 3

kazsemisonic 22 Aug 2005, 16:36

Hey everybody,
I'm just starting to learn assembly and got the fasm compiler. Whenever I run my programs nothing happens (I think a dos prompt is just popping up and back down really quickly). So I think if i run it from command prompt I will be able to see the output. Does anybody know how to do this? I'm not having much luck. Thanks

-Kaz

EDIT: I compiled it, so now it's a .bin. But from what I've read in a tutorial, I still need to "link" it to get the .exe. Does fasm come with a linker? If it does, then how do you link it? Thanks for the help.

btw, here's the code:

Code:

MOV AH,02
MOV DL,"!"
INT 21h
MOV AH,04Ch
MOV AL,00
INT 21h

22 Aug 2005, 16:36

polygon7

Joined: 14 Aug 2003
Posts: 62
Location: Poznan, Poland

polygon7 22 Aug 2005, 20:10

Hi,
add "format MZ" at begin of your source file:

Code:

format MZ
MOV AH,02
MOV DL,"!"
INT 21h
MOV AH,04Ch
MOV AL,00
INT 21h

btw. look in fasm/examples directory Smile

_________________
best regards
p7

22 Aug 2005, 20:10

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 22 Aug 2005, 20:47

click start->run and type "command" (or "cmd" under XP). It opens DOS console, let me know with further problems.
btw: "format MZ" means you want to produce .EXE file, you can also use "org 100h" to produce .COM which is more natural solution in this case

22 Aug 2005, 20:47

kazsemisonic

Joined: 22 Aug 2005
Posts: 3

kazsemisonic 23 Aug 2005, 01:21

Thanks, I stuck the "org 100h" in there and it made the .com. Just wondering, when I run it my screen blinks and the program is up, why does it do that? Thanks again.

- Kaz

23 Aug 2005, 01:21

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 23 Aug 2005, 10:36

hmm, what do you mean by "program is up?" are you running it under windoze's console or how?

23 Aug 2005, 10:36

Madis731

Joined: 25 Sep 2003
Posts: 2139
Location: Estonia

Madis731 23 Aug 2005, 10:39

Because when it finishes - it has nothing to do and exits. You have to either put "pause" in the end or infinite loop. Alternatively you can use the command/cmd suggestion made few posts before.
I usually make some a.bat file that has "cmd" ("command" on Win9x) written in it. When opening it in the same directory as your .com file is you can just type the file's name. You can see that it finishes immediately giving you back your blinking (or not Confused

) cursor like this:

Code:

C:\WINDOWS\Desktop>command


Microsoft(R) Windows 98
   (C)Copyright Microsoft Corp 1981-1999.

C:\WINDOWS\Desktop>hello
Hello, World!
C:\WINDOWS\Desktop>_

-OR-

Code:


C:\Documents and Settings\User\Desktop>cmd
Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\Documents and Settings\User\Desktop>hello
Hello, World!
C:\DOCUME~1\User\Desktop>_

23 Aug 2005, 10:39

kazsemisonic

Joined: 22 Aug 2005
Posts: 3

kazsemisonic 23 Aug 2005, 15:32

I got it all figured out now. I can't remember what I did for it to act like that, but I thing I was executing the program from the directory it was in. The screen would go black and then come back up with a new ms-dos console open (not the regular one, but with the file - edit stuff at the top) and the program running in it. Thanks for the help, now it's off to learn some more assembly....

23 Aug 2005, 15:32

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