Format of Extended System Configuration Data Freeform Board Header:
Offset	Size	Description	)
 00h  4 BYTEs	signature "ACFG"
 04h	BYTE	minor version number
 05h	BYTE	major version number (currently 02h)
 06h	BYTE	board type
		01h ISA
		02h EISA
		04h PCI
		08h PCMCIA
		10h PnPISA
		20h MCA
 07h	BYTE	reserved (00h)
 08h	WORD	disabled functions (bit N set = function N disabled)
 0Ah	WORD	configuration error functions
 0Ch	WORD	reconfigurable functions (bit N set = function N reconfig'able)
 0Eh  2 BYTEs	reserved (00h)
SeeAlso: #01249,#01250