Re: [hatari-devel] Re: Screen in Protracker

[Anders Eriksson <ae@xxxxxx>]

On Tue, 21 Feb 2017, Nicolas Pomarède wrote:

> Le 21/02/2017 à 11:13, Nicolas Pomarède a écrit :
>
> > Maybe it depends on your tos version ? Are you using a 60 Hz tos (french
> > one is 50 Hz) ?
> >
> > I see the routine to remove bottom border does a "eor #2,$ff820a", so on
> > a 60 Hz screen, this will do a 50/60 Hz switch instead of the usual
> > 60/50 Hz switch on line 262, which will give different results.
>
> I confirm there's a problem with tos1.04 US for example.
>
> The bottom border is removed on the 60 Hz screen (at hbl 234), but it seems 
> the switch back to 60 Hz is made too late, which might cause the flickering.
>
> I will check this later to be sure, as I don't know many programs that use 60 
> Hz bottom border (Leaving terramis does it and works fine)

Just for the record, I've used Hatari to make many Protracker videos over 
the years, it works fine. It's a PAL program so don't use american TOS, 
although I suppose forcing it to 50 Hz with a small program ahead of 
launching Protracker will work as well.

Another program with low border in 60 Hz is Neochrome Master (escape key 
goes to full image view and have the realtime zoomer in the lower border).

--
Anders Eriksson
ae@xxxxxx     http://www.dhs.nu/
ae@xxxxxxxxx  http://www.atari.org/