Re: [hatari-devel] Tests of Falcon games

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 04/10/2020 à 18:59, Eero Tamminen a écrit :
> > capy : not tested
>
> Dies now to:
> WARN : Bus Error reading at address $ff9c00, PC=$3dfe2 addr_e3=3dfe2 
> op_e3=4cd8
>
> This is *regression* from Hatari v2.2.1.
>
> (FF9C00 is just after normal VIDEL regs.)

> > Sokoban by FUN : game freeze (black screen) after Bus Error writing at 
> > address $ff97fe, PC=$e12bce addr_e3=e12bce op_e3=4ad5
>
> same.

Hi

according to our test results for bus errors in falcon mode, we can see 
that we have different results depending on compatibility mode with ste 
(bit 5 at ff8007).

in falcon mode :
 $FF9C00 - $FFA200 : gives bus error
 $FF9224 - $FF9800 : gives bus error
 -> access to ff9c00 and ff97fe should give bus error

in compatible mode :
 $FF9000 - $FFA000 : no bus error
 -> access ff9c00 and ff97fe should not give bus error

So, are those games really supposed to run in plain falcon mode or 
should compatible mode be used ?
I don't see why the games would access these 2 addresses that don't seem 
to be used for anything.

Nicolas