Retro video games delivered to your door every month!
Click above to get retro games delivered to your door ever month!
X-Hacker.org- Assembly Language - <b>function 4404h (68-4) ioctl: read from block device</b> http://www.X-Hacker.org [<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]
Function 4404h (68-4)    IOCTL: Read from Block Device

    Reads a control string from a block device.

       On entry:      AH         44h
                      AL         04h
                      BL         Drive number (0=default, 1=A, etc.)
                      CX         Number of bytes to read
                      DS:DX      Data or buffer

       Returns:       AX         Number of bytes read
                                 Error code, if CF is set

       Error codes:   1          Device doesn't support control strings
                      5          Drive is invalid

  --------------------------------------------------------------------------

    This subfunction reads CX bytes of data from the block device's
    control channel into either DS:DX or the memory pointed to by DS:DX.
    How data is written is defined by the device driver.  Data can be read
    only if the device can process control strings.

See Also: 44h 4405h

Online resources provided by: http://www.X-Hacker.org --- NG 2 HTML conversion by Dave Pearson