[hatari-devel] Falcon emu and STE compatibility (D-Bug games)

[Laurent Sallafranque]

Hi,

I've uploaded source for full Ste bus compatibility mode (Falcon mode only).

I didn't want to create a new ioMemTabFalconSteMode table (no need to 
maintain 2 tables with the same parameters), so I've done it this way.

Don't hesitate to tell me if you would have preferred another way.

I've tested with some D-bug games, it seems to work well.

I'll try to add the 8 Mhz switch immediately.

Regards

Laurent



Le 18/02/2011 20:09, Laurent Sallafranque a écrit :
> Hi,
>
> Thanks for the files, I'll implement the full STe bus this ween end 
> (if I've got enough time).
>
> According to your test, I've removes this line in IoMemTabFalcon
>
> //    { 0xff800A, SIZE_WORD, IoMem_VoidRead, IoMem_VoidWrite 
> },                               /* Fix Illusion demo */
>
> And the demo still works well.
> I've got no explanation why it didn't work before and it does now.
>
> Regards
>
> Laurent
>
>
> Le 18/02/2011 00:02, Thomas Huth a écrit :
>> Am Thu, 17 Feb 2011 23:13:02 +0100
>> schrieb Laurent Sallafranque<laurent.sallafranque at free.fr>:
>>
>>> I'm pretty sure they use register $ff8007.b (Bit 0)  for this (I'll
>>> check tomorrow).
>>>
>>> Is there a way for us to switch the CPU speed of Hatari from 16 Mhz
>>> to 8 Mhz (or from 8 Mhz to 16 Mhz) on the fly (while Hatari runs) ?
>> You could try to modify the nCpuFreqShift variable... it is used to
>> scale the CPU frequency (see M68000_AddCycles() in m68000.h).
>>
>>
>>> - When bit 5 of register $ff8007.b is clear (I'll check this too
>>> tomorrow), all STe specific addresses (like shadow addresses) become
>>> allowed.
>> Yes, if I remember correctly, the STE Bus mode bit can be used to
>> disable the bus errors for certain memory regions, including the PSG
>> shadow registers.
>>
>> I once measured this behaviour with my bus error testing program, you
>> can find the results for this STE-Bus mode in the following two files:
>>
>> tests/buserror/results/fal_c_b.txt&  tests/buserror/results/fal_c_w.txt
>>
>>   Regards,
>>    Thomas
>> _______________________________________________
>> hatari-devel mailing list
>> hatari-devel at lists.berlios.de
>> https://lists.berlios.de/mailman/listinfo/hatari-devel
>>
>>
>
> _______________________________________________
> hatari-devel mailing list
> hatari-devel at lists.berlios.de
> https://lists.berlios.de/mailman/listinfo/hatari-devel
>
>