Bitfields for service flags:
Bit(s)	Description	)
 0	supports broadcast
 1	supports multicast
 2	supports functional/group addressing
 3	supports promiscuous mode
 4	station address software settable
 5	statistics always current
 6	supports InitiateDiagnostics
 7	supports loopback
 8	MAC does primarily ReceiveChain indications instead of ReceiveLookahead
	indications
 9	supports IBM source routing
 10	supports MAC reset
 11	supports Open/Close adapter
 12	supports interrupt request
 13	supports source routing bridge
 14	supports GDT virtual addresses (OS/2 version)
 15	multiple TransferDatas allowed durign a single indication
 16	MAC normally sets FrameSize = 0 in ReceiveLookahead
 17-31	reserved, must be 0