Bitfields for 10NET System Flags:
Bit(s)	Description	)
 0	in NetBIOS
 1	processing INT 28
 2	is server
 3	in net user-DOS function
 4	in DOS user-DOS function
 5	in net for user non-DOS function
 6	in server DOS function
 7	in server non-DOS function
 8	in terminate
 10	in user on server request
 13	in DOS for user on server
 14	disable critical error handler