Int 21/AH=21h

DOS 1+ - READ RANDOM RECORD FROM FCB FILE

AH = 21h DS:DX -> opened FCB (see #01345)

Return:
AL = status 00h successful 01h end of file, no data read 02h segment wrap in DTA, no data read 03h end of file, partial record read Disk Tranfer Area filled with record read from file

Notes: The record is read from the current file position as specified by the random record and record size fields of the FCB. The file position is not updated after reading the record. If a partial record is read, it is zero-padded to the full size. Not supported by MS Windows 3.0 DOSX.EXE DOS extender

See Also: AH=14h - AH=22h - AH=27h - AH=3Fh"DOS"

Category: DOS Kernel - Int 21h - D

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