Re: [hatari-devel] little problem with 060 CPU and prefetch or cycle exact modes

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 05/07/2017 à 23:45, Laurent Sallafranque a écrit :
> Hi all,
>
> I've got a problem with the 060 CPU :
>
>
> If I run hatari with 060 CPU and prefetch mode AND cycle exact 
> unchecked, hatari runs well.
>
> But If I check (activate) either "prefetch mode" or "cycle exact", the 
> desktop displays very very slowly.
>
>
> Is it a bug in hatari ?

Hi

68060 is really very simple regarding accuracy, it mostly considers each 
instruction takes 1 cycle and apart from that it's a 68040 with 
different opcodes.

It could be a problem in Hatari, I don't think anyone really uses 68060 
mode, so we don't have many reports.

For now, don't use prefetch or cycle exact for 68060, even it didn't 
slow down Hatari, you wouldn't see any better results anyway (there's no 
cycle exact mode for 68060).


Nicolas