Format of XGA DMQS buffer:
Offset	Size	Description	)
 00h	WORD	offset (in bytes) to DMQS data for next XGA instance
 02h	BYTE	slot number
 03h	BYTE	XGA implementation function level identifier
 04h	BYTE	XGA implementation resolution level identifier
 05h	WORD	vendor identifier - identifies card vendor
 07h	WORD	vendor defined field
 09h	WORD	XGA adapter I/O register base address
 0Bh	WORD	XGA coprocessor register base address
		(paragraph--multiply by 10h to get physical address)
 0Dh	WORD	1 Megabyte system video memory aperture
		0000h if not allocated
		(Multiply by 100000h to get physical address)
 0Fh	WORD	4 Megabyte system video memory aperture
		0000h if not allocated
		(multiply by 100000h to get physical address)
 11h	WORD	video memory base address
		(multiply by 100000h to get physical address)
 13h	WORD	composite ID of the attached display
 15h	BYTE	amount of video memory available, in multiples of 256K bytes
 16h	DWORD	alternate XGA coprocessor register base address.  0 = none.
 1Ah	var	DMQS Data for further XGA Instances (as above)
Note:	"Instances" refers to the capability of having up to 8 XGA
	  adapters in one computer.
SeeAlso: #00061