Subject: Re: 512x384 displays
To: Emile Schwarz <emile.schwarz@wanadoo.fr>
From: David A. Gatwood <dgatwood@deepspace.mklinux.org>
List: port-mac68k
Date: 10/07/2000 11:16:39
On Sat, 7 Oct 2000, Emile Schwarz wrote:

> The Apple IIgs analog RGB display video on a IIgs was (from memory):
> 
> 320 * 200 * 16 colors
> 
> But it can also be 640 * 200 * 16 colors (dithering)
> 
> also possible is to increase the color numbers to 3200 using scb (video
> interrupts to change the color in the palette)
> 
> 16 palettes of 16 colors.
> 
> At last, I can say, in a < 3MHz machine, we had a color Macintosh (in 1986) with
> a graphic interface (pulling menus, mouse, GUI) compatible with older Apple II
> software but incompatible with "current" (at that time) Macintosh software and I
> think that was the true error; the other characteristics were fine (ADB for the
> first time on an Apple Computer, Music Synthesizer co-processor with 16 channels
> - STEREO -, etc.)

Last I checked, there was a hardware mod necessary to get stereo.  The
outputs were shorted together, to the best of my memory.  And the audio
input was mono, and required making your own custom connector that plugged
into the motherboard.  But yes, I agree.  It was a cool machine.  Even had
a primitive PMMU.  Anybody want to do a BSD port?  ;-)


Later,
David

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