RBIL61 - INT 31 - DPMI 0.9+ - ALLOCATE SPECIFIC LDT DESCRIPTOR {protected mode}

INT 31 P - DPMIsee DOS Protected-Mode Interface 0.9+ - ALLOCATE SPECIFIC LDT DESCRIPTOR
	AX = 000Dh
	BX = LDT selector
Return: CF clear if successful
	    descriptor allocated
	CF set on error
	    AX = error code (DPMIsee DOS Protected-Mode Interface 1.0+) (8011h,8022h) (see #03143)
Notes:	free descriptor with INT 31/AX=0001h
	the first 16 descriptors (04h-7Ch) are reserved for this function, but
	  some may already be in use by other applications under DPMIsee DOS Protected-Mode Interface 0.9;
	  DPMIsee DOS Protected-Mode Interface 1.0 guarantees 16 descriptors per client
	not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0000h,AX=0001h