INT 7F - Alloy NTNX - GET SYSTEM FLAGS                                          
	AH = 0Ah
	CL = 00h
	ES:DI -> buffer for system flags (see #03949)
Return: ES:DI buffer filled
Notes:	on a slave, only the NX_Busy flag is returned
	all three flags are at fixed positions, so this function only needs to
	  be called once
	an interrupt handler should only perform DOS or device accesses when
	  all three flags are 00h


Format of Alloy system flags:
Offset	Size	Description	(Table 03949)
 00h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to NX_Busy flag (nonzero when communicating with users)
 04h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to device driver busy flag
 08h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to InTimer flag