Int 2F Fn 4A11  - Dblspace.bin - "getversion" - Installation Check         [d]

   AX = 4A11h
   BX = 0000h

Return: AX = 0000h (successful)
   BX = 444Dh ("DM")
   CL = first drive letter used by DBLSPACE (0=A:)
   CH = number of drive letters used by DBLSPACE
   DX = internal DBLSPACE.BIN version number (bits 14-0)
       bit 15 set if DBLSPACE.BIN has not yet been relocated to final
       position in memory (i.e. DBLSPACE.SYS /MOVE)
Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the
     disk-compression software bundled with MS-DOS 6.0

See Also: AX=4A11h/BX=0001h,AX=4A11h/BX=0002h,AX=4A11h/BX=0003h

See Also: AX=4A11h/BX=0005h,AX=4A11h/BX=0007h,AX=4A11h/BX=FFFFh

See Also: INT 21/AX=4404h"DBLSPACE"