Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Data Bytes
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     The data (data) bytes give the actual value for constant values.
     In instruction coding, the possible lengths (in bytes) are shown
     in parentheses.
 
     Under the .386 and .486 directives, values can be up to four
     bytes.
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