Format of Intel 82557 Control/Status Registers:
Offset	Size	Description	)
 00h	WORD	SCB status word
 02h	WORD	SCB command word
 04h	DWORD	SCB general pointer
 08h	DWORD	PORT
 0Ch	WORD	Flash control register
 0Eh	WORD	EEPROM control register
 10h	DWORD	MDI control register
 14h	DWORD	Early RCV Interrupt Rx byte count (RXBC) register
Note:	see www.intel.com/design/network/datashts/64434604.pdf for additional
	  details
SeeAlso: #01228