Subj : Re: Why does the colour map move on the VIC-20?
To   : lorryw...@gmail.com
From : Tom Lake
Date : Thu Dec 10 2020 12:30 pm

On Thursday, December 10, 2020 at 2:34:07 PM UTC-5, lorryw...@gmail.com wrote:
> Hello,
>
> Does anyone know why the colour map moves between $9400 and $9600 on the
> Vic? Is there a reason it couldn't stay at a single location such as
> $9400?
>
> I've wondered about this for a while and there is probably an obvious
> reason that I'm missing but I would love to know. My interest in this was
> renewed recently when I was creating a video (links below) which shows
> the colour map being used as a location to store data and now it seems
> I really should find out. I've posted about this on vcfed.org but
> there's been no answer yet so am hoping someone here will know.
>
> Run Code and Store Data in Display Memory on the VIC-20
> Video: https://www.youtube.com/watch?v=EkfBijC8MSU
> Article: https://techtinkering.com/articles/code-and-data-in-display-memory-on-the-vic-20/
>
>
> Best wishes
>
>
> Lorry

Maybe they didn't really plan on memory expansion cartridges?

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