Int 21H Function 17H
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Description: Rename File
Alters the name of all matching files in the current directory on the
disk in the specified drive.
Input Output
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AH=17H If function successful (one or more
DS:DX=segment:offset of files renamed)
"special" file AL=00H
control block If function unsuccessful (no matching
files, or new filename matched an
existing file)
AL=FFH
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