Microsoft KB Archive/68071

= FIX: MASM Aligns on 4-Byte Boundary After Offset 8000h =

Article ID: 68071

Article Last Modified on 10/17/2003

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APPLIES TO


 * Microsoft Macro Assembler 5.1 Standard Edition
 * Microsoft Macro Assembler 5.1a

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This article was previously published under Q68071



SYMPTOMS
The module below demonstrates a problem with the Microsoft Macro Assembler (MASM) versions 5.1 and 5.1a. If an EVEN directive is used after an offset of 8000h within a segment, the assembler will try to align the next instruction or data element on a 4-byte boundary. In other words, more bytes for padding will be added than are necessary to achieve even alignment.



STATUS
Microsoft has confirmed this to be a problem in MASM versions 5.1 and 5.1a. This problem was corrected in MASM version 6.0.



MORE INFORMATION
The following is the assembly listing that is generated for the example below.

Assembly Listing
Code Generated  Source --  --

F8              clc 90              EVEN F8              clc ORG 8000h F8              clc 87 DB 90        EVEN F8              clc

Sample Code
; Assemble options needed: none

_TEXT SEGMENT PARA PUBLIC 'CODE' ASSUME CS:_TEXT start: clc EVEN clc ORG 8000h clc EVEN clc _TEXT ENDS

END start

Additional query words: 5.10 5.10a buglist5.10 buglist5.10a fixlist6.00

Keywords: kbfix KB68071

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