Click above to get retro games delivered to your door ever month!

Function 4405h          Send Control Data to Block Device

    Writes control information of any length and format to a block
    device driver. The format of the information is device-specific
    and does not follow any standard.

        Entry   AX    = 4405h
                BL    = Drive number (0 = default, 1 = A, etc.)
                CX    = Number of bytes to write
                DS:DX = Address of data buffer

        Return  AX = Error code, if CF is set
                     | 01h Invalid function
                     | 05h Access denied
                     | 06h Invalid handle
                     | 0Dh Invalid data