[hatari-devel] Problem in 20 years STe megademo (DHS fullscreen) ?

[Nicolas Pomarède]

Le 20/12/2010 19:42, Laurent Sallafranque a écrit :
> I've used the latest source.
>
> My values :
>
> nMaxWidth = 832
> nMaxHeight = 576
>
> I can take a snapshot if you want.
>
> Regards
>
> Laurent
>
>

I have the same values.

In fact I ran the demo again, and what you see is not garbage, it's the 
background color 0 being changed on each scanline.

On a real STE, you would not see the colors on the left, because left 
border is removed with a switch to hi res (this display real back 
pixels) ; this is not emulated in Hatari, this a very complex things to 
emulate accurately.

On the right border, there're 8 pixels with background colors, this is 
specific to Hatari and shouldn't be visible. I already had plans to fix 
this, but this requires some rewrite of the screen conversion routines.

Nicolas


> Le 20/12/2010 18:48, Nicolas Pomarède a écrit :
>> Le 20/12/2010 18:42, Anders Eriksson a écrit :
>>> On Mon, 20 Dec 2010, Laurent Sallafranque wrote:
>>>
>>>> I've noticed a problem in the DHS screen (coordonates : X:199 Y:88)
>>>>
>>>> First , there's the tower screen (OK)
>>>> Then, there's a left/right fullscreen. Left and right border displays
>>>> garbage.
>>>> Is it the same on a real computer ?
>>>
>>> Hi,
>>>
>>> no on a real computer it looks alright.
>>>
>>>
>>>> It seems to be the 16 first and 16 last pixels of each line that
>>>> display strangely.
>>>
>>> Have you used the latest Hatari sources with the 224 byte overscan fixes
>>> by Styckx? I've not been able to test them myself, as Hatari doesn't
>>> compile with Xcode any more.
>>
>> for the tests I made with latest hg version, unused pixels in
>> left/right border were black, no garbage for me.
>>
>> What are your value for nMaxWidth / nMaxHeight in hatari.cfg ?
>>
>> Nicolas
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>
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