Article: Q79067
Product(s): Microsoft Macro Assembler
Version(s): 6.0
Operating System(s):
Keyword(s):
Last Modified: 04-MAY-2001
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The information in this article applies to:
- Microsoft Macro Assembler (MASM), version 6.0
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SYMPTOMS
========
With the Microsoft Macro Assembler (MASM) 6.0, the following error is generated
incorrectly for instructions using the operand [ebx][ebx]:
error A2029 : multiple base registers not allowed
For example:
lea esi, [ebx][ebx]
mov esi, [ebx][ebx]
RESOLUTION
==========
A workaround for this problem is to embed the opcode for the instruction
directly in the code. The sample code below demonstrates this method.
STATUS
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Microsoft has confirmed this to be a problem in MASM version 6.0. This problem
has been corrected in MASM version 6.0a.
MORE INFORMATION
================
Error A2029 will be incorrectly generated for the following program. The code
that should be generated for lea esi [ebx][ebx] is 8D 34 1B. Note that the
operand [ebx][ebx] is available only when using the .386 or .486 directives.
Sample Code
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; Assembler options needed none
.386
.MODEL flat
.STACK 4096
CODE32 SEGMENT PUBLIC USE32
main PROC near
lea esi, [ebx][ebx] ; Replace this by BYTE 8Dh, 34h, 1Bh
ret
main ENDP
CODE32 ENDS
END
Additional query words: 6.00 buglist6.00 fixlist6.00a
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Keywords :
Technology : kbMASMsearch kbAudDeveloper kbMASM600
Version : :6.0
Solution Type : kbfix
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