Re: [hatari-devel] Re: Leonard/Oxygene trace protection crashes on Hatari

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 21/12/2016 à 10:25, Troed Sångberg a écrit :
> Console output:
>
> Illegal instruction: 4e7a at 000127AE -> 000127B4
> M68000 Bus Error reading at address $ff8e21 PC=$127ca.
> Bus Error at address $ff8e21, PC=$127ca addr_e3=127cc op_e3=4210
> Your Atari program just did something terribly stupid:
> VoidMem_xlate($e8198216)
> Bus error wget at e8400000
> M68000 Bus Error reading at address $e8400000 PC=$e83ffffa.
> Bus Error at address $e8400000, PC=$e83ffffa addr_e3=e83ffffe op_e3=0
>
> I like the error comment ;) I'm assuming (haven't debugged) that this is
> a trace protection modifying next instructions in sync.
>
> /Troed

Hi

I know this demo, I downloaded it some times ago on atari-forum and 
traced it under hatari.
Hatari perfectly handled the trace+sync, but it crashed when decoding 
bytes n*512 (around the end of the file, can't remember the value of 
'n'), which lead me to the conclusion that the file itself was corrupted 
and some sectors were not correctly read from the original floppy.

I would need to find the thead on atari-forum about this.

IIRC I also tried it on my STF and it crashed too.

Did you try it on a real STF ? Maybe it's a different version that the 
one I tested earlier.

Nicolas


> On Wed, Dec 21, 2016 at 10:13 AM, Troed Sångberg <troed@xxxxxxxxxxx
> <mailto:troed@xxxxxxxxxxx>> wrote:
>
>     (and SainT .. )
>
>     Just saw this in a discussion on Facebook, and verified on Hatari
>     v2.0.0 with compatible, no patching ST and TOS 1.04. Double bus error.
>
>     https://demozoo.org/productions/67830/
>     <https://demozoo.org/productions/67830/>
>
>     https://www.facebook.com/orion.fuzion/posts/10208055804013106?comment_id=10208092119320966&comment_tracking=%7B%22tn%22%3A%22R%22%7D
>     <https://www.facebook.com/orion.fuzion/posts/10208055804013106?comment_id=10208092119320966&comment_tracking=%7B%22tn%22%3A%22R%22%7D>
>
>     /Troed