Saved up the $500 from my first summer job after my freshman year in high school in '80. Just looked it up on oldcomputers.net and learned more than I knew. Installed the RS232 card by unplugging the 8080, plugging it into the card, and plugging the card into the empty processor socket. Game controllers were funky...digital direction and an analog knob at the top of the stick. BASIC was a little like the CoCo, especially the graphics (x,y,color,something...or was it x,y,fg,bg?), but different enough to find it painful to convert. I think it overheated due to the very solid metal box the mainboard was contained in. Was forgotten when family for a ][e in '83. WHEE!!!