Re: [hatari-devel] DSP addressing bug

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Hi Doug,

> Quick question Laurent - does the patch also work for (Rn)-Nn addressing? 

It should ;)

But I think I understand precisely the problem now (in hatari, -Nn is passed as a negative argument to the function when the addressing mode is (Rn)-Nn, I'll have to rewrite it by adding a sign variable and keeping Nn unchanged).
Don't expec this fix before tuesday or wednesday (we'll have family at home in the next days).

At least, I see how to fix it definitively now.



----- Mail original -----
De: "Douglas Little" <doug694@xxxxxxxxxxxxxx>
À: hatari-devel@xxxxxxxxxxxxxxxxxxx
Envoyé: Vendredi 23 Octobre 2015 12:20:16
Objet: Re: [hatari-devel] DSP addressing bug

Quick question Laurent - does the patch also work for (Rn)-Nn addressing? 

If I keep my workaround just for this case and remove it for the (Rn)+Nn cases the remaining problem seems to go away... 


On 23 October 2015 at 11:11, Douglas Little < doug694@xxxxxxxxxxxxxx > wrote: 

Yep definitely something is slightly different on real HW. I'm getting selectively black pixels in Hatari where they look correct on HW. Previously I was getting a completely destroyed image. 

It's going to take effort to figure out what's going on but I still see some kind of problem. I'll try to narrow it down a bit. 


On 23 October 2015 at 10:54, Douglas Little < doug694@xxxxxxxxxxxxxx > wrote: 

Perhaps I spoke too soon. There is something funny still happening - but I'll need to do more checks to make sure it's not my fault. I'll update soon when i have more info.... 


On 23 October 2015 at 10:13, Douglas Little < doug694@xxxxxxxxxxxxxx > wrote: 

It works for me - everything looks good! 

Thanks :) 

I'll report if I run into any problems with it but I don't think so. 


On 22 October 2015 at 22:10, Laurent Sallafranque < laurent.sallafranque@xxxxxxx > wrote: 

I've already tested : 

EKO_systems : still working to the end 
TERE RA'I ;) : still working to the end 
Sololuminezcent : still working to the end 

underscore demo seems to crash now but it also crash with the n-1 version of hatari (ie without my patch). 
There's a regression with this demo, it was at least working to the 4rth screen before. 

I continue some tests but the patch seems OK to me. 



Le 22/10/2015 23:02, Nicolas Pomarède a écrit : 

Le 22/10/2015 22:57, Douglas Little a écrit : 

Woo, that was quick. Thanks! 

If the patch has made it into the repo, I can just collect tomorrow's 
nightly build and see if that works for me. Sounds like it probably 
will. Otherwise I'll try a local build tomorrow. 


unfortunately, it seems builds at are not regularly updated anymore (and it even returns a HTTP 503 error at the moment :( ) 


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