INT 2fH 4a11H BX=000aH: Set Automount Drives

                                                         Compatibility: 6.2+ 
 Expects: AX    4a11H (mux number)
          BX    000aH (DoubleSpace fn code)
          CX:DX bitmap of drives to enable/disable for automount (see below)
 Returns: AX    DoubleSpace API Error Code (0000H=success)
          CX:DX bitmap indicating previous automount settings
    Info: This service is new for DOS 6.2.

          This lets you enable and disable automounting for some or all
          removable-media drives.  In conjunction with INT 2fH 4a11H 000bH,
          you can use it to see if automounting is possible.

    CX:DX Is treated as a 32-bit bitmap, with the lowest 26 bits each
          representing one drive.  Bit 0 of DX represents drive A, bit 1 is
          drive B...bit 15 is drive P.  Bit 0 of CX represents drive Q,

          A bit-value of 1 specifies to enable the drive for automounting.

          On Entry:  CX:DX specifies which drives you want to enable and
          disable for automounting.

          On Return: CX:DX contains the previous settings.

   Notes: ■ If all automounting is disabled (Automount=0 in DBLSPACE.INI),
            then this call will have no effect.

          ■ You can see if automounting is possible by using this fn to
            try to enable a drive, then using INT 2fH 4a11H 000bH (query
            automount drives) to see if the change was recorded.

See Also: DoubleSpace Overview
          DoubleSpace API
          INT 2fH: Multiplex Interrupt
          DOS Functions