Re: [hatari-devel] WinUAE CPU core MMU option and CPU accuracy?

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 17/11/2016 à 18:23, Laurent Sallafranque a écrit :
> I second that.
> The falcon is a machine with a MMU, it should be enabled.
> But maybe the timings in MMU mode are worse than in cycle exact or
> prefetch mode.
>
> We should be careful with that before enabling the MMU

Hi

IIRC without looking at the sources now, cpu is indeed less 
cycle-accurate when MMU mode is set.

I guess for now MMU mode is more about running unix like OSes under 
680x0 cpu where memory protection and all are needed, than about being 
cycle accurate to run demos/games.

Maybe it could be disabled by default for falcon, I don't think many 
games/demos are using it anyway, and TOS test for MMU can be bypassed 
during boot.


Nicolas

> Le 16/11/2016 à 21:32, Eero Tamminen a écrit :
> > Hi,
> >
> > Almost all of the games & demos currently listed
> > in compatibility doc as needing MMU with WinUAE
> > CPU core, work also if:
> > - oldUAE CPU core is used instead, or
> > - CPU exact & compatible options are enabled
> >
> > What enabling MMU for 030 does in regards to
> > WinUAE CPU core emulation accuracy?
> >
> >
> >     - Eero