Re: Using VGA/LCD monitor with a IIgs?

[sporadic <sporadically@gmail.com>]

On Dec 3, 12:29 pm, pitz <pitz.w...@gmail.com> wrote:
> On Dec 3, 12:28 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
>
>
>
> > sporadic wrote:
> > > On Dec 2, 7:26 pm, MdntTrain <j...@cimmeri.com> wrote:
>
> > >>On Dec 2, 12:03 pm, sporadic <sporadica...@gmail.com> wrote:
>
> > >>>On Dec 2, 5:10 am, Steven Hirsch <snhir...@gmail.com> wrote:
>
> > >>>>sporadic wrote:
>
> > >>>>>>Can you publish some screen shots?  In particular, I'd like to see what the
> > >>>>>>80-column text mode looks like.  I'm not a gamer, but do care about being able
> > >>>>>>to use programming tools.
>
> > >>>>>Here are a few pics I just took:
>
> > >>>>>http://picasaweb.google.com/sporadically/GSOnAcer24LCDWithAmbery#
>
> > >>>>I don't think any of those are 80-column text mode, are they?  And, as Mike
> > >>>>added, it would be nice to see the GSOS desktop.
>
> > >>>Pics 1 & 2 are 40 columns, 3 & 4 are 80 columns.  I'm waiting for the
> > >>>MicroDrive to show up so until then, I probably won't have easy access
> > >>>to the GSOS desktop.  I'll look for the system 6 setup disk, it's
> > >>>gotta be here somewhere.
>
> > >>>Jimmy
>
> > >>   A friend tested this unit.  It crapped out on 16mhz video
> > >>(640x200).  Maybe you'll have better luck.
>
> > >>      jS
>
> > > So is the GS Finder desktop 640x200?  I nearly broke out in a cold
> > > sweat when I read this and I had to find the GSOS disk.  Well, I'm
> > > still happy to report that it's working for me.  I've updated the
> > > picasa album with 3 more pictures from the Finder desktop.  I also
> > > found a disk labeled Slide.3200.Vol#3, and ShowAll 3200 SmallPic,
> > > which I vaguely recall as the palette switching 3200 color pics.  They
> > > also displayed via the Ambery on the Acer 24" LCD.
>
> > > I'll be happy to take more pictures this weekend, with better lighting
> > > and steadier hands:
>
> > >http://picasaweb.google.com/sporadically/GSOnAcer24LCDWithAmbery#
>
> > All the vertical stripes are the problem with 16MHz.  Ideally it would
> > be a non-distracting solid light blue (produced by a 16MHz dither
> > between dark blue and white [8MHz fundamental]).
>
> > -michael
>
> > NadaNet and AppleCrate II: parallel computing for Apple II computers!
> > Home page:http://home.comcast.net/~mjmahon
>
> > "The wastebasket is our most important design
> > tool--and it's seriously underused."
>
> I'm getting curious about this.  As I understand it, the Finder
> desktop is 640 across.  From the Ambery web site specs, the box can
> output 640x480, 1024x768, or 1366x768, depending on switch selection.
> I'm guessing that the 640x480 setting is what's been selected.  What
> about that blue margin around the desktop?  If the Ambery box is
> receiving that, is there an intelligent way of stripping that so that
> it maps better to the 640-pixel output setting?
>
> Looking at sporadic's pictures, I'm guessing that the LCD is set to
> not expand the input to fill the screen (and we could rule out
> dithering by the monitor).  So is the dithering being applied by the
> Ambery box?

The Ambery output is set to 1366x768, and the Acer is set to display 1-
to-1 aspect ration without any scaling.  I'll try the 640x480 and
1024x768 output tonight, and also try the old Viewsonic 15" to see if
the dithering is "better" with the old CRT.  I'm also going to build a
proper cable this weekend, the current cable is one that I spliced and
basically twisted the wires together and wrapped with electrical
tape.  Assuming a shielded cable will improve the image quality.

The blue margin is the standard GS border, I should be able to change
the color in the control panel to verify that.

Pitz, feel free to swing by this weekend if you have time and see it
for yourself.

Jimmy