Re: [hatari-devel] MMU emulation broken ?

[Laurent Sallafranque <laurent.sallafranque@xxxxxxx>]

Just for info, there's still this message when Hatari boots with MMU 
enabled :

Exception_mmu 00e02cde 00e02cde 00000000

But now, with Thomas' patch, it boots to the GEM.
Maybe this exception is normal, I don't know.

Regards
Laurent



Le 08/09/2013 20:21, Laurent Sallafranque a écrit :
> Hi,
>
> Thanks a lot Thomas for the patch.
> Hatari runs well again to the gemdos with MMU enabled.
>
> The EXA demo doesn't work and gives the following :
>
> Exception_mmu 00e0184e 00e0184e 00000000
> Exception_mmu 00e0184e 00e0184e 00000000
> Exception_mmu 00020346 00020340 00000000
> A-Trap a000 at 20e02 ((nil))
> B-Trap f4f8 at 5c076 ((nil))
> B-Trap f4f8 at 3c1680 ((nil))
> Illegal instruction: 4f61 at 0005BFA4 -> 0005BFE6
> MMU disabled
> MMU enabled
>
> I think there's a MMU problem left, but I'm really not a MMU 
> specialist here (I don't know what the MMU is and what is it useful for)
> Any specialist here to confirm the problem ?
>
> Best regards
>
> Laurent
>
>
>
> Le 08/09/2013 16:44, Thomas Huth a écrit :
> >   Hi!
> >
> > Am Tue, 03 Sep 2013 10:45:38 +0200
> > schrieb Laurent Sallafranque <laurent.sallafranque@xxxxxxx>:
> > > I wanted to try evolution demo by EXA (patched today by ggn).
> > > It seems to need the MMU emulation to run.
> > > But when I select MMU in hatari GUI, I get the following:
> > >
> > > Building CPU, 45989 opcodes (3 0 1)
> > > CPU=68030, FPU=68882, MMU=1, JIT=0.
> > > MMU disabled
> > > MMU enabled
> > > Exception_mmu 00e02cde 00e02cde 00000000
> > >
> > > And hatari stops running on the initial black screen, before starting
> > > the white (GEM) screen and the falcon memory check.
> > >
> > > Any idea ?
> > Looks like this bug stepped in before the 1.7 release already ... seems
> > like some of Nicolas' new MFP exception magic was missing from
> > Exception_mmu(). I moved that code now to the common Exception()
> > function so MMU mode should boot fine to the desktop again.
> > I haven't tested the EXA demo, though.
> >
> >   Thomas