Re: Making the ][+ better

[mjmahon@aol.com (Michael J. Mahon)]

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

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