)
Values user initialization function is called with:
	EBX = physical address of block's start
	ESI = user data from function 82h call
	EDI = user data from function 82h call
	CS = code selector for XMS block at EBX (16-bit or 32-bit)
	DS = data selector for XMS block, starting at EBX
	ES = selector for V86 memory access to full real-mode 1088K
	GS = selector for full 4G flat address space
	SS:ESP -> stack provided by host
Return: via 32-bit FAR return
Note:	the initialization function may call any protected-mode Cloaking
	  service; it should store the values of DS, ES, and GS for future
	  reference