move.w	#-1,-(sp)
		move.w	#$58,-(sp)	;get_original_rez
		trap	#14
		addq.l	#4,sp
		move.w	d0,org_falcon_rez

		move.w	$ffff82aa.w,org_overscanbtm	;bottom overscan

;This bit will automatically set the falcon video res but it will
;preserve the RGB/VGA mode.
;			  fedcba9876543210
;Octet de poids faible :    S O P V 8 N N N
		move.w	d0,d1
		and.w	#%00010000,d1
		move.w	#%0000000010100010,d0
		or.w	d1,d0
		move.w	d0,-(sp)
		move.w	#$58,-(sp)
		trap	#14
		addq.l	#4,sp

;Octet de poids faible :    S O P V 8 N N N
;	N  Bits par pixels :	4 -> 16 bits	65536 colours
;				3 -> 8  bits	256 colours
;				2 -> 4  bits	16 colours
;				1 -> 2  bits	1 colours
;				0 -> 1  bit
;	8 Flag 80 colonnes :	1 -> mode 80 colonnes
;				0 -> mode 40 colonnes
;	V Flag VGA         :	1 -> mode moniteur VGA
;				0 -> mode TV
;	P Flag PAL         :	1 -> mode PAL
;				0 -> mode NTSC
;	O Flag Overscan    :	1 -> Overscan ON (impossible en VGA)
;				0 -> Overscan OFF

;Where 'mode' looks like this:-
;    bits            meaning
;    0-2             These bits form a value so that 2^X represents the 
;                    number of bits/pixel
;    3               80 coloun flag (if set, 80 columns, otherwise 40)
;    4               VGA Flag (if set, VGA mode, if not TV/RGB mode) 
;    5               PAL Flag (if set, PAL mode, otherwise NTSC)
;    6               Overscan Flag (not valid with VGA)
;    7               ST compatibility flag
;    8               Vertical flag (if set, enables interlace mode on a         
;                    colour monitor or double line mode on a VGA monitor)
;    9-15            Reserved (set 0)