"Eloraam calls it the 65EL02, because "it supports all the 6502, 65C02, and part of the 65C816 instruction set" as well as "a set of completely new instructions and two addressing modes." Since the 65EL02 is an 8-bit CPU, Eloraam didn't have as many options for programming environments as we have on today's 64-bit computers. While it's possible to program the 65EL02 in assembly language, for general use she chose to implement a Forth interpreter. Further technical information about RedPower Control's 65EL02 is available on Eloraam's blog RP Control Internals, and on the RedPower wiki's page for Red Power Control."
Fair disclosure: The video linked in the article is mine"