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

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

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