Re: [hatari-devel] UAE 68030 MMU + prefetch + instruction and data cache emulation

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 27/07/2017 à 20:29, Nicolas Pomarède a écrit :
>
> thanks Toni for your work ; I will try to update Hatari with this 
tomorrow.
>
> Nicolas
>
>

Hi

Hatari sources were juste updated with Toni's latest changes.

Here's a little summary of the mode we have for 68030 now, when using 
the "cpu setting" dialog in Hatari :


MMU not enabled :

- Cycle Exact	68030 CE + caches (internal mode=4  op_smalltbl_24_ff)
- Prefetch	68030 prefetch, no cache (internal mode=3  op_smalltbl_22_ff)
- none		68030 basic, no cache (internal mode=0  op_smalltbl_2_ff)


MMU enabled :

- Cycle Exact	68030 MMU + prefetch + cache (internal mode=6 
op_smalltbl_34_ff)
- Prefetch	68030 MMU + prefetch + cache (internal mode=6  op_smalltbl_34_ff)
- none		68030 MMU, no cache (internal mode=5  op_smalltbl_32_ff)


NOTE :

 - there's no "cycle exact" mode for now in 68030 MMU, it's the same 
emulation as "prefetch". For "cycle exact" 68030 (instructions tail/head 
and more accurate cycles) don't use MMU mode.

 - even in "cycle exact" mode without MMU, cycles are not always 
correct yet, this is still work in progress.


To test for regressions / bugs, please check your favorites 
games/demos/utils and report programs that work in 68030 prefetch 
without MMU, but crash in the new mode 68030 prefetch with MMU (and caches).

Nicolas