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

INT 31 P - DPMIsee DOS Protected-Mode Interface 0.9+ - FREE LDT DESCRIPTOR
	AX = 0001h
	BX = selector to free
Return: CF clear if successful
	CF set on error
	    AX = error code (DPMIsee DOS Protected-Mode Interface 1.0+) (8022h) (see #03143)
Notes:	only one descriptor is freed per call
	the program's initial CS, DS, and SS descriptors may be freed
	(DPMIsee DOS Protected-Mode Interface 1.0+) any segment registers containing the freed selector are
	  set to 0000h
	not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0000h,AX=000Ah,AX=000Dh,INT 21/AX=3502h