INT 16 - TEXTCAP 2.0 - UNINSTALL                                                
	AX = 4253h
Return: AX = segment of resident code
Notes:	the uninstall code does not check whether interrupt vectors have been
	  chained by other programs
	the caller must free the main memory block (using the returned segment)
SeeAlso: AX=4252h,AX=4254h