Interrupt 67h	Expanded Memory Specification
Function  40h	Get Status
entry   AH      40h
return  AH      status (for all Functions)
		00h	Normal return code (No error occured)
		80h	Software error
		81h	Hardware error
		83h	Unallocated or invalid handle
		84h	Undefined function or code
		85h	Out of handles
		87h	Page count error
		88h	Page count error
		89h	Requested zero pages
		8Ah	No logical page for this handle
		8Bh	Physical page outside valid range
		8Ch	Context stack out of memory
		8Dh	Handle already has context stack
		8Eh	No context stack for that handle
		8Fh	Undefined subfunction code