| RE: [hatari-devel] Buss error - $FFFF9200 |
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> From: Thomas Huth [mailto:th.huth@xxxxxx]
> Sent: 31 December 2015 08:44
>
> Am Wed, 30 Dec 2015 15:09:51 +0000
> schrieb "Konador, Cyprian" :
>
> > I'm testing TT/Mega STe DIP switches which are visible under byte
> > $FFFF9200. I discovered that on real STE and Mega STE, byte read from
> > $FFFF9200 causes buss error. Under Hatari that access is allowed.
> > I attached test application DIP2.ZIP. On real hardware it is closed
> > immediately without any prompt.
>
> Concerning Mega STE - Hatari does not emulate this machine yet, only a
> normal STE, and on a normal STE, you can find the joypad buttons
> register at FF9200, so that's normal that you don't see a bus error
> here.
>
> Concerning TT - it seems like Hatari is currently also emulating the
> joypad registers on this machine ... I guess that's wrong? Did the TT
> have the enhanced joypad ports of the STE?
>
> Thomas
Hi
Lets skip TT at that moment.
That instruction works fine on STE/MSTE/Hatari:
move.w $FFFF9200.w,D0
That instruction works fine on STE/MSTE/Hatari:
move.b $FFFF9201.w, D0
That instruction throws Buss Error on STE/MSTE but works fine in Hatari:
move.b $FFFF9200.w,D0
Regards
Cyprian