Re: ancient animation

[gberigan@cse.unl.edu (Greg Berigan)]

nathan@cco.caltech.edu (Nathan Mates) writes:

>   Despite single hires being 280x192, and color resolution something
>like 140x192, the way things were done on the Apple II meant that
>there were two ways of drawing "white." Further, these two were
>slightly offset from each other, giving a doubled horizontal
>resolution for only whites on separate lines, etc.

There was a program that took advantage of this offset.  I believe it
used page flipping to create 80 column text using this shifting between
two pages without the need of extra hardware.  Naturally, it flickered
quite a bit and looked terrible on a color monitor, but it was quite an
interesting sight.  Using both graphic screens did use up a lot of
memory just to get 80 column text though, so it wasn't really practical.
It was designed for use on a ][ or ][+, but it would run on any II,
including the IIgs.

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