Format of DEC DC21140/DC21040/DC21041 Tulip {Fast/Plus} Ethernet:
Offset	Size	Description	)
 00h 64 BYTEs	header (see #00878)
		(vendor ID 1011h, device ID 0014h)
 10h	DWORD	base I/O port for access to control/status registers
 14h	DWORD	base memory address for access to control/status registers
 40h	DWORD	configuration driver area
		bit 31: sleep mode   \ only one of bits 31,30 may be set
		bit 30: snooze mode  /
		bits 15-8: device driver's use
!!!digital\21041hm.pdf p.34   digital\21140ahm.pdf p.35
SeeAlso: #00742