KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q81367: FIX: EVEN, ALIGN Generate Error in AT Segments

Article: Q81367
Product(s): Microsoft Macro Assembler
Version(s): 6.0
Operating System(s): 
Keyword(s): 
Last Modified: 04-MAY-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Macro Assembler (MASM), version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

The Microsoft Macro Assembler (MASM) version 6.0 incorrectly generates the
following error when an EVEN or ALIGN statement is used in a segment that has an
"AT" combine type:

  error A2189: invalid combination with segment alignment : X

X is equal to 2 for EVEN directives, and equal to the alignment of the ALIGN
directive. MASM version 5.1 does not generate this error.

STATUS
======

Microsoft has confirmed this to be a problem in MASM version 6.0. This problem
was corrected in MASM version 6.0a.

Sample Code
-----------

  ; Assemble options needed: none

  ;Hello.asm - This program writes "Hello world." in red at the top of
  ;            screen.

  .MODEL small

  .STACK 4096

  .DATA
  msg    DB 'H', 0Ch, 'e', 0Ch, 'l', 0Ch, 'l', 0Ch, 'o', 0Ch, ' ', 0Ch
         DB 'w', 0Ch, 'o', 0Ch, 'r', 0Ch, 'l', 0Ch, 'd', 0Ch, '.', 0Ch

  _bad   SEGMENT PARA AT 0B800H
         ORG 160
         ALIGN 2            ; This line generates the A2189 error.
  Line2  LABEL   WORD
  _bad   ENDS

  .CODE
  start: mov ax, @data
         mov ds, ax

         mov ax, SEG Line2
         mov es, ax

         mov di, OFFSET Line2
         mov si, OFFSET msg

         mov cx, 0Ch

         rep movsw

         mov ax, 4C00h
         int 21h

  END start

Additional query words: 6.00 5.10 buglist6.00 fixlist6.00a

======================================================================
Keywords          :  
Technology        : kbMASMsearch kbAudDeveloper kbMASM600
Version           : :6.0
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.