Category: DOS kernel
INT 21 - DOS 1+ - WRITE RANDOM RECORD TO FCB FILE AH = 22h DS:DX -> opened FCB (see #01345) Disk Transfer Area contains record to be written Return: AL = status 00h successful 01h disk full 02h segment wrap in DTA Notes: the record is written to the current file position as specified by the random record and record size fields of the FCB the file position is not updated after writing the record if the record is located beyond the end of the file, the file is extended but the intervening data remains uninitialized if the record only partially fills a disk sector, it is copied to a DOS disk buffer to be written out to disk at a later time not supported by MS Windows 3.0 DOSX.EXE DOS extender SeeAlso: AH=15h,AH=21h,AH=28h,AH=40h