Re: Making the ][+ better

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

Rubywand replied:

>"Michael J. Mahon" writes ...
>> 
>> Rubywand writes ...
>> 
>> >     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.
> ....
>
>     If there's a Color-Monochrome switch, you thing that might be a good
>place
>to attach the color killer circuit?-- i.e. to switch to Monochrome.

It would certainly be a good place to try.  It may still be a "slow"
switch, but perhaps not.

I haven't seen a schematic of the AppleColor Composite, but that
would reveal any good places for fast monochrome switching.

-michael

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