darn you this stuff is interesting.
   *[1]http://www.colorforth.com/install.htm*- THIS guy made a pin
   compatible TI99A (and other systems) graphics chip which is
   programmable using a Forth variation he invented he called
   "colorForth". You program in COLORS. I downloaded the version he
   puts on his site for the chip and I was all smiles. * I had to
   go out for the day but all I could think about was getting back
   to understanding this stuff. *A language where YOU DEFINE how
   functions like "IF" might work really changes things.

References

   Visible links
   1. http://www.colorforth.com/install.htm