Aquarius+ Bugs Demo - RLE Encoded Basic Screen Image 

First pass is characters, second pass is foreground color, third is background color. Got slightly better "compression" by splitting them out.

@@RetroComputerist I've worked with CGA text mode which has a similar layout and the extra work of treating chars, foreground, and background as their own "planes" has never really been that much of a benefit in my experience. Either there's no space savings, or the additional processing outweighs the savings. You might want to look into LZ4 - very easy to decode and also has RLE opportunities.

@@JimLeonard Most of the purpose of the exercise was to convert something written for the Mattel Aquarius to check compatibility with the AQ+