DOS / Functions / 22

                   INT 21 - DOS - RANDOM DISK RECORD WRITE

Input	DOS1	Y	DOS2	Y	DOS3	Y	DOS5	Y	Output
AX	22h						Status		AX
BX									BX
CX									CX
									DX
DS:DX	Address of FCB								CF

Status: 0 = Successful read
        1 = End of file
        2 = Data transfer area too small
        3 = Partial record, EOF

See Also 15h 1Ah 28h 40h FCB