[Openchrome-users] TVout overscan adjustment on CN400?

[John Robinson]

On 05/07/2006 09:58, Greg Farrell wrote:
>> No real issues - just wanting to fettle up the display so I can read the
>> Mythtv menus rather than quessing the first letter!
[...]
> Some over-scan is needed for good tv. Though if you've tested with a test
> card I guess you're pretty sure you've too much overscan.

Even if you did tweak the Noscale modes to fit your TV better, if you 
stick with reasonably correct PAL (or NTSC) timings you're only going to 
be able to move the picture about a little, and perhaps change the 
horizontal size a little (e.g. by using a faster dotclock with wider 
left and right borders to make the picture narrower). It won't be 
possible to shrink or grow the picture vertically without removing or 
adding scan lines, and that would definitely mean driving the TV with 
non-PAL (or NTSC) timings - the CRT equivalent of overclocking.

Cheers,

John.