Re: Making the ][+ better

[bill_gates@microsoft.com (Simon Williams)]

Michael J. Mahon <mjmahon@aol.com> wrote:

> Rubywand wrote:
> 
> >     If you'd like to try building the circuit to kill color in the Text
> >beneath
> >graphics displays, there's a diagram pic at ...
> >
> >
> >http://apple2.org.za/gswv/a2zine/Docs/DiagramsAndSchematics/TextColorKill
> er.jpg
> 
> This is a fine example of a "fast" color killer, which works not by
> putting the monitor into monochrome mode (which would take some
> time) but by reducing the gain of the chroma subcarrier.
> 
> The visual result is the same, except for "clever" color monitors
> like the AppleColor Composite, which will not have time to increase
> its lumnance bandwidth for sharp text, as it does when it switches
> to monochrome mode.
> 
> I think that there is another place in the AppleColor Composite
> circuit where a similar circuit could be attached to switch it to
> true monochrome mode quickly, allowing crisp 80-column text
> under a DHR display.
> 
> -michael
> 
> Check out parallel computing for 8-bit Apples on my
> Home page:  http://members.aol.com/MJMahon/

This might be getting off topic, but does the IIc+ have something like
this built in? I had mine hoked up to my TV and noticed that text
display had the expected *horrible* red and green haloes, but when I ran
anything with a HGR screen the 4 text lines at the bottom were much
sharper and the haloes seemed much less "saturated".

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