Format of Everex mode information record:
Offset	Size	Description	)
 00h	BYTE	mode number (bit 7 set if extended mode)
 01h	BYTE	mode type (see #00196)
 02h	BYTE	info bits (see #00198)
 03h	BYTE	font height
 04h	BYTE	text columns on screen
 05h	BYTE	text rows on screen
 06h	WORD	number of scan lines
 08h	BYTE	color information
		bits 7-4 reserved
		     3-0 bits per pixel