BTW, this January 1978 magazine article specifically says Mattel Auto Race, Missile Attack and Football are Rockwell PPS-4/1.
http://blog.modernmechanix.com/new-1978-electronic-games/4/

But Handheld Museum (and others) says Football is Rockwell B6100-15 (modified calculator chip).
www.handheldmuseum.com/Mattel/FB.htm

Magazine article here:
https://archive.org/stream/creative...g_v04_n01_1978_Jan-Feb#page/n27/mode/2up
also says Rockwell B6000 series.

Patent says Rockwell "B6000 Series"
http://www.google.com/patents/US4322074

Anyhow, this is not TMS09xx/1xxx related, hap, but we know Sean is interested. wink