INT 31 - DPMI 0.9+ - CREATE ALIAS DESCRIPTOR

	AX = 000Ah
	BX = selector
Return: CF clear if successful
	    AX = new data selector
	CF set on error
	    AX = error code (DPMI 1.0+) (8011h,8022h) (see #03143)
Notes:	fails if selector in BX is not a code segment or is invalid
	use INT 31/AX=0001h to free new selector
	future changes to the original selector will not be reflected in the
	  returned alias selector
	not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0001h