Re: [hatari-devel] MMU compatibility (was: Tests of Falcon games)

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 20/10/2020 à 14:04, Eero Tamminen a écrit :
> Hi,
>
> On 10/17/20 10:24 AM, laurent.sallafranque@xxxxxxx wrote:
> > Thanks Eero.
> > I think maybe that mmu enabled should now be the normal setting for 
> > Falcon
> > emulation and one should disable MMU only for speed or special case.
>
> Although better, I think MMU emulation in Hatari
> is still too buggy to be enabled by default, at
> least in regards to prefetch & cache emulation
> (--compatible on --cpu-exact on).
>
> Note: based on what Toni has said about things
> working on Amiga side with WinUAE, this seems to
> be Hatari or Atari specific problem.  Do we have
> some HW components which memory accesses don't
> go through MMU/cache emulation like it should
> (DSP, blitter, DMA etc)?

Hi

quite the opposite, they shouldn't go through cache/mmu since they're 
not part of the cpu.
AFAIK, it's already the case.

On my side, there won't be time to have a deep look at this before 
relase ; much work has been made with CPU, MMU was greatly improved 
compared to hatari 2.2, non working issues should be added to 
compatibilty list and we will have another round of MMU work after 
hatari 2.3 is released (it's too risky to change things now at these 
places where MMU is involved)

Nicolas