DOCERR: DUP Is a Reserved Word in MASM

 Last reviewed: November 3, 1994
Article ID: Q39527
The information in this article applies to:
  • Microsoft Macro Assembler for MS-DOS and OS/2, version 5.1

The table of reserved words in MASM on Page 69 of the "Microsoft Macro Assembler Programmer's Guide" does not include DUP. DUP is an operator for defining arrays, buffers and other data structures consisting of multiple data objects of the same size. DUP cannot be used as a variable. For example, the following statement allocates the string "Test " five times for a total of 20 bytes: 

   DB   5 DUP ("Test ")

Additional reference words: 5.10
KBCategory: kbprg kbdocerr
KBSubcategory: MASMLngIss

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Last reviewed: November 3, 1994
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