Re: Crosspost: Did the cpu influence the display?

["Michael J. Mahon" <mjmahon@aol.com>]

Eric Smith wrote:
> "Michael J. Mahon" <mjmahon@aol.com> writes:
>
> > His point is well taken--the Apple II display mapping is motivated
> > by the desire to display 40 characters/280 pixels per line while
> > leaving as few/small holes as possible and using as little logic
> > as possible.  DRAM refresh is not a primary consideration, since
> > its requirements are easily met by many mappings.
>
>
> And if you install the Video Associate Labs VB3 Microkeyer in your
> Apple II or Apple II+, you get some added video modes including linear
> mapping.
>
> Wish I still had mine.  Sigh.

That's a pretty amazing mod, since video generation is so
pervasive in the Apple II design.

How did it do that?

-michael

Music synthesis for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
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