Re: PET hi-res board

Mine is an interlaced 512x512 in a 8296 and it works fine on the inbuilt 
monitor. It is quite a slow phosphor monitor so the interlace flicker is 
not too noticeable. This monitor timing is very different though and on 
mine I need to tweak the v and h sizings a little because I'm missing 
the bottom 30 pixels or so when in hi-res mode. The horizontal size is 
also very compressed, here is a screen image which is plotted from 0,0 
to 511,511.

http://inchocks.co.uk/commodore/PET/GFXBoard/DisplayAlignment1.jpg

Rob

On 24/07/2012 00:02, didier@aida.org wrote:
> Hi
>
> The board I tested in 1982 was just not working in 512x512
> It was using "interlaced" lines so we just saw flickering
> you could be see sick after having watched the screen for 1 mn :)
>
> perhaps that it worked fine with a new release of this board with the
> connector for an external monitor.
>
> --
> Didier
>
>
>
>
> -----Message d'origine-----
> De : owner-cbm-hackers@musoftware.de
> [mailto:owner-cbm-hackers@musoftware.de] De la part de Rhialto
> Envoyé : lundi 23 juillet 2012 23:51
> À : cbm-hackers@musoftware.de
> Objet : Re: PET hi-res board
>
> On Mon 23 Jul 2012 at 22:44:52 +0200, Christian Dirks wrote:
>> Am 23.07.2012 21:39, schrieb Steve Gray:
>>> [...] I don't know of any real software that would use it. [...]
>>>
>> About a year ago I bought a PCB layout system: A 8032-SK with the HSG
>> board installed, an additional external monitor, a Watanabe flatbed
>> plotter with integrated IEEE-488 interface, and ... some disks,
>> including the PCB layout software and some PCB files.
>> Unfortuantely no documentation, but I managed loading, displaying and
>> plotting PCB files.
> Well, that makes a case for adding some emulation to VICE.
> I have no idea how complex that graphics chip is but it helps that its
> memory apparently isn't mapped into CPU address space.
>
> How does a 512 x 512 graphics screen go on a display that normally shows
> 640 x 200 (80*8 x 25*8)? I must assume that they can show only one or the
> other, with wildly differing video timings?
>
>> Christian Dirks
> -Olaf.
> --
> ___ Olaf 'Rhialto' Seibert  -- There's no point being grown-up if you
> \X/ rhialto/at/xs4all.nl    -- can't be childish sometimes. -The 4th Doctor
>
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