Format of VGA video hardware state:
Offset	Size	Description	)
 00h	BYTE	sequencer index register
 01h	BYTE	CRTC index register
 02h	BYTE	graphics controller index register
 03h	BYTE	attribute controller index register
 04h	BYTE	feature controller register
 05h  4 BYTEs	sequencer registers
 09h	BYTE	sequencer register 0
 0Ah 25 BYTEs	CRTC registers 0-8
 23h 16 BYTEs	palette registers 00h-0Fh
 33h  4 BYTEs	attribute registers 10h-13h
 37h  9 BYTEs	graphics controller registers 0-8
 40h	BYTE	CRTC base address (low)
 41h	BYTE	CRTC base address (high)
 42h	BYTE	plane 0 latch
 43h	BYTE	plane 1 latch
 44h	BYTE	plane 2 latch
 45h	BYTE	plane 3 latch