Hexadecimal Numbers Must Begin With a Digit Between 0 and 9

Last reviewed: January 23, 1995
Article ID: Q24958

The information in this article applies to:

Microsoft Macro Assembler for MS-DOS, versions 5.0, 5.1, 6.0, 6.0a, and 6.0b

SUMMARY

With the Microsoft Macro Assembler, a hexadecimal number must begin with a digit between zero and nine. This is so that the assembler can distinguish between something that should be a number and something that should be a label.

MORE INFORMATION

Assembling the following code will result in the following errors, since the assembler will assume that ABh is a label

MASM 5.0, 5.1:   error A2009: Symbol not defined: ABh
MASM 6.0:        error A2006: undefined symbol: ABh

Sample Code

;Assemble options needed: none

   .model small
   .code

      mov ax, ABh

    end

Additional reference words: kbinf 5.00 5.10 6.00 6.00a 6.00b
KBCategory: kbtool
KBSubCategory: MLIss

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Last reviewed: January 23, 1995
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