Re: [hatari-devel] VBL warnings from Hatari on MegaSTE 8->16Mhz change

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

I mailed the CPX.

Another issue is that STDOOM crashes when cache bit is enabled, but I'm 
not sure whether that's STDOOM or Hatari issue, because Hatari comment 
states that the cache bit is not emulated:
https://github.com/hatari/hatari/blob/main/src/ioMemTabSTE.c#L31


	- Eero

On 23.5.2025 14.30, Nicolas Pomarède wrote:
> Le 22/05/2025 à 23:08, Eero Tamminen a écrit :
> > Hi Nicolas,
> >
> > It tried running latest Hatari git with (EmuTOS v1.3 +) MegaSTE 
> > emulation.
> >
> > I think (Emu)TOS sets CPU to 8Mhz initially, but when "general.cpx" 
> > configuration changes MegaSTE to 16Mhz, or 16Mhz+cache during, I see 
> > lots of warnings like this:
> > cyc since vbl old 177270 != new 177338
> > cyc since vbl old 177364 != new 177432
> >
> > They stop only when EmuTOS desktop is reached.
> >
> > Few more of those warnings come if I change at runtime from 8Mhz to 
> > 16Mhz in the CPX.
>
> Hi
>
> these warnings are from the change to remove CYCLES_COUNTER_VIDEO, to 
> ensure the new counter method work as before.
>
> They are harmless when you have only 1 ou 2 of them after changing some 
> settings, but I will have a look to try to fix these (it could be more 
> problematic for demos using precise cycle synchronisation)
>
> Could you send "general.cpx" or give a link to it, in order to have the 
> same context as you ?
>
> Note for emutos : would be great to have directly an option to change 
> MegaSTE 8/16 Mhz or cache from the emutos desktop :)
>
> Nicolas