Re: [hatari-devel] SCU/VME register access?

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

On 14.6.2024 11.57, Nicolas Pomarède wrote:
> Le 13/06/2024 à 22:47, Nicolas Pomarède a écrit :
> > So, similar to SystemV (as discussed on atari-forum) it seems linux 
> > doesn't need hsync nor vsync interrupt and sys_mask at ff8e01 should 
> > be set to 0x00 and not 0x10.
> >
> > I guess it would work also if we set vectos[VEC_INT4] in current code 
> > for TT (Eero sent me such image, I will check later), but it's 
> > certainly cleaner to completely disable vsync and hsync in SCU sys_mask
>
> I also tested the linux image Eero sent me with the addition of :
>
>   vectors[VEC_INT4] = falcon_hblhandler;
>
> in the case of the TT / SCU
>
> With 0x10 in sys_mask to enable vsync interrupt then linux also boots 
> correctly with Hatari and start busybox
>
> So I think there's really a bug in Linux sources in the case of the TT, 
> as no vsync is needed anymore by this linux version SCU's sys_mask 
> should be set to 0x00 not 0x10
>
> If someone feels like reporting this to Geert Uytterhoeven who maintain 
> this m68k linux port ?

Thanks for debugging (both you and Christian)!

I can report it to m68k linux mailing list.


	- Eero