Print Page - undefined symbol?

Title: undefined symbol?
Post by: realcr on July 23, 2006, 08:09:30 PM

Hi there.
I tried using tasm for dos mode [you can't program for windows all the time lol...] , however some things aren't working as expected.

Code Select


DOSSEG
    .MODEL SMALL
    .STACK 200h
    .DATA

OurString   DB  "This is a string of characters.  "
            DB  "Do you lack imagination?  Put something interesting here!$"
.CODE

START:


    mov si,600h
    mov di,[si]
    mov [si+5],di


    mov ax,12h
    call WriteInt

    MOV   AX, 4C00h             ; Exit to DOS sufunction
    INT   21h                   ; Generate interrupt 21h



  WriteInt:
  ; Prints the content of the AX register onto the screen
  MOV     CX , 0Ah
  @@GetNextChar:
    XOR     DX , DX
    DIV     CX
    PUSH    DX
    OR      AX , AX
    JZ      @@PrintIt
    CALL    @@GetNextChar
  @@PrintIt:
    POP     DX
    ADD     DL , 30h
    MOV     AH , 02h
    INT     21h
  RET


END START

C:\>c:\tasm\bin\tasm.exe aaa.asm
Turbo Assembler Version 4.1 Copyright (c) 1988, 1996 Borland International

Assembling file: aaa.asm
**Error** aaa.asm(17) Undefined symbol: WRITEINT
Error messages: 1
Warning messages: None
Passes: 1
Remaining memory: 415k

I have no idea what's wrong , I thought I writeint was defined.
thanks,
bar.

Title: Re: undefined symbol?
Post by: skywalker on July 24, 2006, 12:17:13 AM

I'ts been a long while, but you need to do something like this.

WriteInt Proc

....

WriteInt endp

Title: Re: undefined symbol?
Post by: MichaelW on July 24, 2006, 07:59:29 AM

Using TASM 3.1 I cannot duplicate the problem. The source as posted assembles OK:

Code Select


Turbo Assembler  Version 3.1  Copyright (c) 1988, 1992 Borland International

Assembling file:   test.asm
Error messages:    None
Warning messages:  None
Passes:            1
Remaining memory:  459k

And the object module links OK, and the EXE runs OK, displaying "18" before it exits.

And the same results with MASM.

Title: Re: undefined symbol?
Post by: realcr on July 24, 2006, 09:09:06 AM

thanks MichaelW and skywalker.
skywalker , I tried at first to use the proc notation but it still didn't work , so I guess indeed something is wrong with my tasm.
Anyways, if u already mentioned that , where can I find the masm version which allows me to write assembly programs for dos? Because I remember hutch saying that the masm version that can be downloaded from the masm website can't do that...
I prefer masm over tasm so I will be more than happy to know I can use masm for dos programming.

bar.

Title: Re: undefined symbol?
Post by: MichaelW on July 24, 2006, 07:18:01 PM

The ML 6.14 from the MASM32 package will work just fine for 16-bit DOS applications, but you must replace the linker. The one that I use is available here (version 5.63):

http://spiff.tripnet.se/~iczelion/download.html

Title: Re: undefined symbol?
Post by: realcr on July 26, 2006, 09:01:48 AM

Tnx Michael! Finally masm to get things work.

bar.

The MASM Forum Archive 2004 to 2012

Miscellaneous Forums => 16 bit DOS Programming => Topic started by: realcr on July 23, 2006, 08:09:30 PM