Int 21H Function 24H
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Description: Set Relative-Record Number
Sets the relative-record-number field of a file control block (FCB) to
correspond to the current file position as recorded in the opened FCB.
Input Output
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AH=24H AL is destroyed (other registers not
DS:DX=segment:offset of affected)
previously opened FCB relative-record field (offset
file control block 21H) updated
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