INT 31H 0000H: Allocate LDT Descriptors

                                                    Compatibility: DPMI 0.9+ 
 Expects: AX    0000H
          CX    desired number of descriptors to allocate
 Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
          AX    base selector (if successful)
    Info: Allocates one or more descriptors in the LDT.

          If CX > 1, then AX returns with the base selector of a series.
          Use INT 31H 0000H to obtain the increment used to calculate the
          other selectors.

          This does not allocate memory. Use fns such as INT 31H 0501H and
          INT 31H 0504H to obtain memory before setting a descriptor to
          point to it.

          Use fns such as INT 31H 0002H (segment to descriptor) and
          INT 31H 0007H (set segment base address) to prepare the selector
          for use.

See Also: DPMI API
          INT 2fH: Multiplex Interrupt
          DOS Functions