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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Sign (s) Bit
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     If the sign (s) bit is set, sign-extend 8-bit immediate data
     to 16 bits. Under the .386 or .486 directive, sign-extend 8-bit and
     16-bit immediate data to 32 bits.
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