Format of CAPI v2.0 capabilities:
Offset	Size	Description	)
 00h	WORD	number of installed controllers
 02h	WORD	number of supported B channels
 04h	DWORD	global options (see #04075)
 08h	DWORD	B1 protocol support flags (see #04076)
 0Ch	DWORD	B2 protocol support flags (see #04077)
 10h	DWORD	B3 protocol support flags (see #04078)
 14h 24 BYTEs	reserved for CAPI use
 2Ch 20 BYTEs	vendor-specific information