31 Aug
2011
31 Aug
'11
4:06 p.m.
On Wed, 31 Aug 2011 20:06:46 +0100 (BST), ard at p850ug1.demon.co.uk (Tony
Duell) wrote:
> One thing I am wondering about. The monitor
I'm testing this with is a
> Monitor ///. It gives a perfect picture from a Europlus (50fps), but on
> this one, it looks like it can't sync to the NTSCoid output of the II+.
> Might have to find something that is more 60Hz-happy. Or maybe there's
> still something wrong with the video output. Will check when I next get
a
moment.
The horizontal frequencies (15625Hz .vs. 15750 Hz IIRC) are sufficiently
close that just about any monitor that will sync to one will sync to the
other. So if you have a problem other than vertical syuc (picture rolling vertically), I would suspect a fault. In gneral most
monitors will sync
toi 50 or 60Hz verticla if you tweak the vertical hold control (may be an
internal preset, though).
Right - this monitor is doing more than just rolling, the text only appears
on the right side of the screen, and it's not stable in X or Y. I might
look at it on an NTSC monitor just to make sure the rates are right, but I
suspect that there are nasty things going on with the output. More work
required.
Cheers,
Mike