Video Timing Register

Number	$11
Readable	Yes
Writable	Yes
Short Description	Sets video output timing variant.

(writable in config mode only)

Bit	Function
7-3	Reserved, must be 0
2-0	video signal timing variant

Possible timing variants:

Bit pattern	selected variant
%000	Base VGA timing (50/60Hz depending on bit 2 of Peripheral 1 Register ($05))
%001	VGA setting 1
%010	VGA setting 2
%011	VGA setting 3
%100	VGA setting 4
%101	VGA setting 5
%110	VGA setting 6
%111	HDMI

Each VGA setting increases the frequency by approximately 1 kHz.